Raspberry Cane Blight Cane Blight is a serious fungal disease which affects raspberry canes. Also, a raspberry plant may die of old age, since most will live 20 years or less. It is a fungal disease â caused by the fungus Didymella applanata â that attacks the leaves and canes of raspberry plants. Raspberry cane blight is a fungal disease caused by Leptosphaeria coniothyrium. Disease Control Sprays for Raspberry Plants Bonide® Captan Fruit & Ornamental (wettable powder) For: Anthracnose, brown rot, blight, leafspot, botrytis rot (gray mold), mummy berry, spur blight, phomopsis cane and leaf spot, downy mildew, and more. Doing so will get rid of all the borers, but it will also eliminate an early-season berry crop the following year. County extension offices candiagnose this disease either directly through in-office examination or through shipment toextension diagnostic clinics. Red-brown discolorations appear on stems, then turn dark purple or black and necrotic. ), which can destroy your crop if it is left untreated, it will spread from one plant to your whole raspberry patch.Fortunately the disease is fairly easy to prevent, and even easier to treat. They are followed shortly by many slightly larger, black, erupting spots; another f… 120). ... Prevention and Control. The pathogen survives over winter on infected or dead canes. Also, you should take care with the cane site selection. Copyright © 2016, The Ohio State University, Michael A. Ellis, Department of Plant Pathology, © 2020 The Ohio State University, College of Food, Agricultural, and Environmental Sciences, College of Food, Agricultural, and Environmental Sciences, Ohio Agricultural Research and Development Center, 2120 Fyffe Road | Room 3 Ag Admin Bldg. Do not plant strawberries in … Control of cane blight is possible through both cultural and chemical means. Raspberry cane blight: Cane blight is a serious fungal disease in raspberries. The adult raspberry cane borer (Oberea bimaculata) appears in June, and is a slender black beetle about 12.5 mm (1/2 inch) long.It can be recognized by the yellow band near its head and its prominent antennae. Thresholds and Management Also, practice pest control measures. These lesions expand, sometimes covering all the area between two leaves. Cane blight is a fungal disease that affects the health of canes (i.e., stems) of cultivated and wild Rubus species (e.g., raspberries and blackberries), wherever they are grown. Prevent damage and wounds to canes by controlling cane borers. Cultural. Raspberry Cane and Fruit Rot Fungicides . Spur blight in brambles can reduce your raspberry harvest.Read on to learn about spur blight symptoms and spur blight control. Fire blight affects both red and black raspberries and blackberries. Cane blight: lesion . This fact sheet was originally published in 2008. Cane blight (Leptosphaeria coniothyrium) The attack can be seen on the base of the sprouts, as 10-15 cm diameter spots. To treat cane-blight, you must prune the infected canes back to the ground, and then dust them with sulfur dust. avoid dense planting; increase air circulation, rigorous pruning, efficient weed control, avoid high applications of nitrogen; prune out infected canes; Cane Blight. Cane blight infections most often occur from late April to early May. It’s also a good idea to dispose of old, diseased canes immediately after harvest. Sudden wilt of suckers. The fungus overwinters in infected canes and on pruned cane stubs. The disease occasionally occurs on blackberries and dewberries. For example, keeping fruiting rows narrow and weeded assists them in drying after a rain, as does thinning out weak canes. For technical support please contact the CFAES Helpdesk. CFAES COVID-19 Resources: Safe and Healthy Buckeyes | COVID-19 Hub | CFAES Calendar. Control These include eliminating weed-whacking near the canes, controlling insect pests and limiting pruning. Spores germinate in wounds and produce new infections. Your raspberry canes can also die due to improper watering, lack of sunlight, poor soil conditions, diseases, or pests. What is cane blight? They are also prone to mineral deficiencies which can look similar to viruses. By Matt Gibson. Petioles may be left attached to the cane. Pest & Disease Control for Raspberry Plants. - Raspberry Cane Blight; healthy plants on right, blighted canes on left. FOLLOW. Sign up to get all the latest gardening tips! The blight is actually a fungal disease that enters the plant through small wounds. Cut back to below soil level and disinfect the secateurs between cuts. Disease Control Sprays for Raspberry Plants Bonide® Captan Fruit & Ornamental (wettable powder) For : Anthracnose, brown rot, blight, leafspot, botrytis rot (gray mold), mummy berry, spur blight, phomopsis cane and leaf spot, downy mildew, and more. Under moist conditions, the spores germinate and penetrate pruning wounds, insect punctures, fruit stem breaks, and other wounds. They can provide a continuous source of spores to spread this and other diseases and pests to cultivated raspberries and blackberries. Cane blight will be visible as wilted brown or black canes. Cane blight infection is likely to be more severe in years where heavy rainfall occurred during the harvest period. Do any pruning work during dry weather to allow wounds to dry out and prevent infection by the fungal spores. When you are trying to learn how to manage spur blight, think about what you can do to help keep the canes dry. Cane blight may cause your berries to become small and hard, and not mature properly. 2120 Fyffe Road | Room 3 Ag Admin Bldg. If not removed, the larvae burrows down the cane to the base and into the crown the next summer. 1. The fungus can live all winter long on dead canes. Columbus, Ohio 43210 You can help prevent fungal cane blight by using cultural practices that prevent damage to the canes. Old canes should be removed before growth starts in the spring. Cane blight was resulting in poor growth and dieback of this blackberry. Cane blight is one of the more damaging diseases of raspberries. All steps possible should be taken to improve air circulation within a planting, to allow faster drying of foliage and canes. | Columbus, Ohio 43210. The spots are pink and become black. Raspberry Leaf & Bud Mite Cane blight can result in wilt and death of lateral shoots, a general weakening of the cane, and reduced yield. The disease occasionally occurs on blackberries and dewberries. Raspberry Anthracnose. Black raspberry is more susceptible to this disease than the other brambles. The blue columns apply to timings when the the registered ... â¢ Spur blight, cane blight, rust â¢ Apply 1000-1500 L/ha (run-off). Control aphids and other pests. Notably, the application of Phytoverm, a Streptomyces avermitilis metabolite, had a similar inhibitory effect on disease growth. The disease is most common on black raspberries but also occurs on red and purple varieties. After entry the fungus rapidly invades and kills bark and other cane tissues. If your raspberry bush buds die, the side shoots wilt and the canes fail, cane blight is probably the culprit. Location, weather, and upkeep are factors that weigh in on which issues your raspberries encounter and how well they stands up to them. Cane blight can result in wilt and death of lateral shoots, a general weakening of the cane, and reduced yield. The key is to start with virus-free planting material, and to recognise when the effects of virus infection make it worthwhile to replace the plants. Learn more: Notes on raspberry diseases: Cane blight ... Raspberry cane borer. CFAES provides research and related educational programs to clientele on a nondiscriminatory basis. It may attack black raspberry at points where canes have been snapped off or pruned to force lateral growth. We connect with people in all stages of life, from young children to older adults. In late summer or early fall, bark in the affected area splits lengthwise and small black specks, fungal fruiting bodies (pycnidia), appear in the lesions. ... chemical control can be difficult and invloves spraying foliage or drenching soil with appropriate insecticides. This reduces yield the following year. ... We do not feel that we are able to suggest any chemical sprays for control. Nova, Julia, and Newburgh raspberry plants are known to be highly tolerant to cane blight. Raspberry canes can grow from 0.5 to in excess of 2 m (1.6–6.6 ft) in height and red raspberry will produce a commercial yield of fruit for 16–20 years, while black raspberry has a shorter lifespan and will produce for 4–8 years. Raspberry Spur Blight is a fungal disease where canes develop purple patches and become less productive. A The spores survive for several years in the soil, so plant new raspberries elsewhere. To prevent the occurrence of cane blight on your raspberries, plant versions of the plant that are resistant or tolerant. Pests such as cane maggots and borers will cause wounds that act as easy infection points. Raspberry Cane Borer. 'Boysenberry', 'Loganberry', and 'Youngberry' canes are seldom infected with cane blight unless canes first are frozen, pruned, or mechanically damaged. Proper cane spacing and weed control will maximize sun exposure and air flow and facilitate drying of canes. 3. To avoid the need to prune back your plants, you will need to care for your raspberries properly, in a way that will prevent cane-blight. Cane blight is caused by the fungus Leptospaeria coniothyrium. Incubation of dead ste… Cane blight is one of the more damaging diseases of raspberries. Look for The sulfur dust will prevent the infection from reoccurring. Look carefully below this foliage for dark brown or purple cankers that can extend along the cane for several inches. Disinfect pruning tools between uses. Raspberry spur blight is caused by a different fungus (Didymella applanata) and, although the symptoms differ, the control â¦ Cane blight is a common fungal disease of raspberries (Rubus sp. The berries dry up as a result of cane - wilt (Fig. Note characteristic double cut around egg laying scar, resulting in wilted shoots . Use liquid lime sulfur when new leaves arrive, and be sure to cover all of the canes thoroughly. Any planting of raspberries is likely to decline over time as result of virus infection. You’ll do best to start a defense against cane blight early by adopting good cultural practices. The fungus produces two types of fruiting structures —pseudothecia and pycnidia — both of which are largely buried in the dead bark tissue. This allows plants to dry quicker after wet periods, and reduces the chance of infection. The Cane Midge and different forms of Raspberry Blight are grouped together because, although they are all very different, significant damage always starts with an attack of Cane Midge. Raspberry cane blight â the fungus Leptospaeria coniothyrium causes this disease. with pruning wounds or injuries, which may not be obvious. You’ll also notice the bases are brittle and darker in color. Purple to brown lesions appear just below the leaf or bud, usually on the lower portion of the stem. Use only sharp tools for pruning, and disinfest pruning tools after each cut by dipping them for at least 30 seconds in … Make sure that the bottom half of canes receive adequate fungicide coverage. In the spring, spores (both ascospores and conidia) are released from mature fruiting bodies in wet weather and dispersed by splashing rain or irrigation. The cankers enlarge and extend down the cane or encircle it, causing lateral shoots above the diseased area to wilt and eventually die. Cane blight can be a major disease of blackberry in the Southeast, resulting in severe losses â and sometimes causing the complete destruction of fruiting canes in any given year. The following spring, spores are released and carried by splashing rain and wind to nearby primocanes. Avoid any other pests or cultural practices that result in wounding of the canes. It is usually caused by the fungus Leptosphaeria coniothyrium, a fungus that can also attack roses and rot the fruit of apple and pear trees. These lesions expand, sometimes covering the area between two leaves. The susceptibility of purple raspberries is unknown. Note characteristic double cut around egg laying scar, resulting in wilted shoots . Specifically, chitinases, when applied, were found to reduce lesion size, and control infection of internal tissues. They are also susceptible to direct attack. See: Raspberry (Rubus spp. Bacterial cane blight is caused by an undetermined pathovar of the bacterium Pseudomonas syringae. Do not work with canes in wet weather. It also helps to try to keep the cane foliage dry, or aid its rapid drying. Raspberry Cane Blight The first symptom is dead leave sin the summer, followed by a dark brown base to the cane, which becomes very brittle. As with all living things, raspberry plants may experience issues as they grow, such as the presence of pests or diseases. Life History. CFAES Diversity | Nondiscrimination notice | Site Map. Location, weather, and upkeep are factors that weigh in on which issues your raspberries encounter and how well they stands up to them. Cane blight is a disease that affects brambles. Do not plant canes in soil that recently grew roses, wild berries, tomatoes, potatoes, or peppers. Raspberry spur blight is caused by the fungus Didymella applanata. Control of Spur Blight and Cane Blight These blights are not difficult to control if the following suggestions are followed. On infected second-year canes (floricanes), the side branches may suddenly wilt and die, usually between blossoming and fruit ripening. During winter, infected canes commonly become cracked, brittle, and snap off easily. MANAGING RASPBERRY CANE DISEASES Cathy Heidenreich, ... (Cane blight photos courtesy of Wayne Wilcox, NYSAES Cornell University) Cultural control - Exclude, Inhibit or Limit, and Eradicate! This includes ensuring good drainage and using drip irrigation. Also, practice pest control measures. It sporadically attacks canes of all Rubus species. Keep plantings free of insects, since they may cause wounds that serve as entry points for the fungus. During harvest, examine primocanes for lesions, which appear as dark brown areas around buds on the cane. Raspberry canes only produce fruit in their first year (ever-bearing) or second year (summer-bearing), so they may look dead after that. Here are some preventative steps that may save your raspberry crop: Purchase canes from disease-free nurseries. Recent research indicates that chitinases may effectively control against raspberry spur blight. Raspberry cane infected with spur blight ... Wilting of a raspberry cane of two-years old due to phytophthora root rot. Apply as a delayed dormant (1 cm green tip) â¢ $119/acre 2. Cane blight on raspberry (Rubus) Cane blight of raspberries is a late season disease caused by the fungus, Leptosphaeria conithyrium. Fungal fruiting bodies are formed in older cankers and complete the disease cycle. | Columbus, Ohio 43210 | 614-292-6181 Cane blight is generally associated with mechanical wounds, while midge blight affects the feeding sites of Resseliella theobaldi resseliella theobaldi Subject Category: Organism Names see more details. Typically, plants need replacing every 7 to 12 years. ISHS Symposium on Breeding and Machine Harvesting of Rubus and Ribes CONTROL OF CANE BLIGHT (LEPTOSPHAERIA CONIOTHYRIUM) IN RED RASPBERRY FOLLOWING MECHANICAL HARVESTING Their damage is distinctive and appears about 6 inches below the caneâs tip. Control is easy and organic, just remove the portion of the stem between the two girdles and throw it in the trash. Raspberry moth (Lampronia corticella) The adults are butterflies. Cane blight lesion on thornless blackberry. Wild brambles, especially wild raspberries, growing in the area should be removed. Weeds are very effective in reducing air movement; therefore, good weed control within and between rows is important for improving air circulation within the planting. as effective in spur blight control are not approved for further use in the EU, such as benomyl, captafol, dichlofluanid, ferbam and zineb (EU Pesticides Database, 2014). This is evidenced by the fact that a single berry in a cluster, or even one side of a berry, may be diseased. Blighted canes cannot be cured. )-Cane Blight. Pests such as cane maggots and borers will cause wounds that act as easy infection points. The major symptom of cane blight is the development of dark-colored cankers on or near existing wounds on the raspberry cane. The attacked tissues sink, crack and evolve in canker zones. The fungus ... Any fruit that does develop on a raspberry cane with fruit blight can be small, seedy and drier than is typical. Margarita Shternshis, Tatyana Shpatova, Anatoly Belyaev, Effect of Two Biological Formulations Based on Bacillus subtilis and Pseudomonas fluorescens on Control of Didymella applanata , the Causal Agent of Red Raspberry Cane Spur Blight , International Journal â¦ Cane blight lesion when bark is scraped away . Control of cane blight is the same as for anthracnose or spur blight. Healthy, rapidly growing plants that have been properly fertilized and watered, are more resistant to cane blight. The incidence of disease can be minimized by adopting and following proper management techniques. You are likely to first notice wilted foliage. Burn affected stems. The symptoms first appear on young first-year primocanes in late spring or early summer. In late summer or early fall, bark in the affected area splits lengthwise and small black specks, which are fungal fruiting bodies (pycnidia) appear in the lesions. Nova, Julia, and Newburgh raspberry plants are known to be highly tolerant to cane blight. Vigorous, adequately fertilized and watered plants are more resistant to injury and less likely to attract harmful insects. Anthracnose. Spur blight control is aided by good air circulation through the canes. Control of cane blight is possible through both cultural and chemical means. Different control control Subject Category: Miscellaneous see more details measures are required. If the cane blight disease is getting the best of your brambles, apply an application of lime sulfur or copper to your dormant plants. Symptoms first appear on primocanes in late spring or early summer. Bayerâs Fruit & Vegetable Disease Control may be effective, but if the disease is widespread the canes will need to be replaced. 2. Pruning wounds are the most common site of infection, but all types of … Raspberry Plant Problems: Reasons For Raspberry Canes Turning Brown, What Is Spur Blight: Learn About Spur Blight Symptoms And Control, Reasons For Apple Cankers – Managing An Apple Tree With Canker, Planting A Giving Garden: Food Bank Garden Ideas, Giving To Food Deserts – How To Donate To Food Deserts, December To-Do List – What To Do In December Gardens, Tomato Plant Insect Pests: Tips For Treating Pests On Tomatoes, Hops Plant Types: How Many Hops Varieties Are There, Harvesting Prickly Pear Fruit: When And How To Pick Prickly Pear Cactus, Tips On Composting Spent Hops – Adding Used Hops In Compost, Recipes From The Garden: Pressure Cooking Root Vegetables, Gratitude For The Garden – Being Grateful For Each Growing Season, 7 Reasons To Do Your Garden Shopping Locally, Thankful Beyond Words – What Represents Gratefulness In My Garden. The fungus infects young canes through wounds which are initially caused by raspberry cane midge attack, late spring frosts or pruning. It can be quite serious if widespread or left untreated. In the meanwhile, choose less susceptible cultivars. Cane Blight. Leptosphaeria coniothyrium Symptoms. Pest & Disease Control for Raspberry Plants. Wet conditions favor spur blight development. Infected canes may blossom normally, but they usually wilt and die before they can set fruit or while they are heavy with fruit. After harvest, remove and destroy all old fruited floricanes and any new primocanes canes that are infected. What is spur blight? Cane disease fungi thrive in wet weather and spread on splashing water. It is usually most severe during wet growing seasons. The raspberry cultivar ‘Julia’ has some resistance to cane blight. They are followed shortly by many slightly larger, black, erupting spots, another form of fungal fruiting body (perit… Bacterial cane blight symptoms are similar to those of the fungus-caused disease. For an accessible format of this publication, visit cfaes.osu.edu/accessibility. Read on for information about plants affected by cane blight and cane blight control. Late fall is the time to fill up a pump sprayer to apply lime sulfur solution to treat the raspberry bushes for resistance against cane blight. You can help prevent fungal cane blight by using cultural practices that prevent damage to the canes. ... applied for cane disease control. Excessive applications of fertilizer (especially nitrogen) should be avoided, since it promotes excessive growth of very susceptible succulent plant tissue. Spores formed on these canes cause infection when rain, wind or insects carries them into damaged areas or wounds on the canes. To prevent the occurrence of cane blight on your raspberries, plant versions of the plant that are resistant or tolerant. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. If you have a disability and experience difficulty accessing this content request accommodation here. Cane blight and spur blight often occur simultaneously, making diagnosis difficult. The grubs of Cane Midge overwinter in the soil and initially emerge as tiny flies in late spring to early summer (dependant on weather conditions). If cane blight is a serious problem, the use of fungicides should be considered. For the most current spray recommendations, commercial growers are referred to Bulletin 506, Midwest Fruit Pest Management Guide, and backyard growers are referred to Bulletin 780, Controlling Diseases and Insects in Home Fruit Plantings. During summer, leaves on fruiting canes wither and the bases of the canes turn dark brown, and the bark may split. Cane blight symptoms. Cane blight: lesion . This site designed and maintained by CFAES Marketing and Communications. Early cane blight infections may resemble spur blight; however, cane blight usually covers the whole stem and is not confined to the leaf node areas as with spur blight. Several diseases attack raspberry plants, including spur blight.It has the most impact on red and purple raspberry brambles. The grubs of Cane Midge overwinter in the soil and initially emerge as tiny flies in late spring to early summer (dependant on weather conditions). Q What diseases affect raspberries? The beetle cuts 2 rings around the stem about 2.5 cm (I inch) apart and 10-20 cm (4-8 inches) below the shoot tip. Figure 1. Cane borers leave telltale signs when they attack a raspberry cane. (Cane blight photos courtesy of Wayne Wilcox, NYSAES Cornell University) Cultural control - Exclude, Inhibit or Limit, and Eradicate! Cane blight usually affects only canes that have been wounded in their vegetative year. Cane blight may weaken fruiting canes of red raspberry. For more information, visit cfaesdiversity.osu.edu. MORE ARTICLES. Cane Blight Control. Spur blight, anthracnose and cane blight are fungal diseases that infect raspberries. Control measures: Destroying the affected tissues; Treatments with Karate Zeon, Fastac Active, Laser 240 SC, Calypso 480 SC, Fury. The Cane Midge and different forms of Raspberry Blight are grouped together because, although they are all very different, significant damage always starts with an attack of Cane Midge. All bramble plants – that is, all Rubrus species – can be affected by cane blight. Upon close examination, the presence of dark brown or purplish cankers can be observed on the main cane or branches below the wilted area. In wet weather, large numbers of microscopic spores ooze out of the pycnidia. Q Can raspberry cane blight be prevented? The larvae of a 1/2-inch-long, slender, long-horned beetle, the borers initially cause stem tips to wilt during the summer and early autumn. On the surface of the attacked tissues, the â¦ Fig. The cane blight pathogen survives over winter on infected or dead canes. 120. As with all living things, raspberry plants may experience issues as they grow, such as the presence of pests or diseases. Cane blight . See: Raspberry (Rubus spp. )-Cane Blight. Cane blight lesion when bark is scraped away . A bacterial form of cane blight also exists. College of Food, Agricultural, and Environmental Sciences Likewise,the fungus produces two spore types — ascospores or conidia. The females lay eggs at the base of the petals and sepals. No cane-blight-resistant raspberry cultivars have been identified yet. All steps possible should be taken to improve air circulation within a planting, to allow faster drying of foliage and canes. Affected canes are weak and often break or die the next year. Raspberry Cane Blight: This can be seen identified in the summertime by dead fruit leaves, followed by subsequent cane dieback of canes. While there has been no thorough study of resistance to fire blight among commercially available cultivars, Latham, Boyne, K81-6 and Fallgold raspberries are known to be susceptible. Cane diseases can kill part or all of the raspberry cane. Do not plant raspberries or strawberries in an old raspberry bed without first changing the soil. Purple to brown areas (lesions) appear just below the leaf or bud, usually on the lower portion of the stem. Dead canes continue to produce conidia and remain a source of infection for several years. Ensuring canes are not overcrowded helps prevention, and again the above mentioned product can be an effective control. Perhaps the species most susceptible is black raspberry, but all raspberries can get it, as can roses. Symptoms. Raspberries should be planted in sunny, open areas where water and air drainage are good. Reducing the number and duration of wet periods should reduce the potential for infection. You want the canes to have good drainage and air circulation. bud failure, lateral shoot wilt, and cane death. Spur blight control starts with good cultural practices. Cane blight is a nasty fungal disease that affects raspberry, blackberry, and rose plant stems as well as the fruit of apple and pear trees.Though all of these plants are at risk of contracting cane blight, the raspberry plant (namely black raspberry) is most susceptible. Cane blight is caused by Leptosphaeria coniothyrium, a common fungus that also causes stemcanker on roses and other ornamentals. Starting with disease free plants is an important part of your disease management plan. Sign up for our newsletter. Pruning when plants are dormant allows ample time for wounds to close at a time of year when spores of the cane blight fungus are not being produced. Margarita Shternshis, Tatyana Shpatova, Anatoly Belyaev, Effect of Two Biological Formulations Based on Bacillus subtilis and Pseudomonas fluorescens on Control of Didymella applanata , the Causal Agent of Red Raspberry Cane Spur Blight , International Journal of … What is cane blight? Accessibility Accommodation. It’s a disease that attacks all kinds of cane plants including black, purple and red raspberries. Raspberry plants should not be grown in soil that is overly moist. The disease is most common on black raspberries but also occurs on red and purple varieties. In late spring begin checking floricanes and primocane foliage for brown wedge-shaped lesions, characteristic of spur blight. All symptoms of cane blight occur in close association with wounds. This ooze gives the bark a dark-gray, smudgy appearance. These include eliminating weed-whacking near the canes, controlling insect pests and limiting pruning. Blackberry, is a perennial shrub in the family Rosaceae that is grown for its aggregate black fruit of the same name. The wood becomes very brittle so that the canes snap off easily at the base. It is usually most severe during wet growing seasons. Raspberry cane borers attack blackberry and raspberry plants. Where the disease develops, cut out and dispose of any affected canes. On first-year canes (primocanes) dark brown-to-purplish cankers form on new canes near the end of the season where pruning, insect, and other wounds are present. Starting with disease free plants is an important part of your disease management plan. The following spring, spores are â¦ We work with families and children, farmers and businessowners, community leaders and elected officials to build better lives, better businesses and better communities to make Ohio great. Black specks, which are reproductive bodies of the cane blight fungus, develop in the brown cankered bark. It is generally not reported in other states as a major disease of blackberries, except when winter injury occurs on thornless blackberries, and most of the reports are associated with raspberry. Record percent infected hills. The problem of raspberry spur and cane blight has become more prominent over the past years as â¦ You are most likely to see cane blight infections between late April and early May. They are nocturnal. Reduce cane diseases by maintaining narrow beds and open canopies within the raspberry patch. Phone: 614-292-6181, © 2020 | 2120 Fyffe Road | Room 3 Ag Admin Bldg. Raspberry Cane Blight is a fungal disease affecting both well managed and neglected raspberry stands alike. Anthracnose on stem ... Raspberry cane borer. Apply one spray of lime-sulfur in late winter when the plants are dormant. Information is given about raspberry cane blight, a disease of raspberries [Rubus idaeus], blackberries [R. fruticosus] and strawberries [Fragaria ananassa], caused by the fungus Leptosphaeria coniothyrium. Control. Cane blight infects first year canes through wounds and grows into the vascular system. Cane blight was resulting in poor growth and dieback of this blackberry. Plants should be maintained in narrow rows and thinned to improve air circulation and allow better light penetration. Eliminating any wild brambles near your raspberry patch will also help cut down on borers, as these plants may also harbor populations of the pest. That prevents overwintering fungus. Learn more: Notes on raspberry diseases: Cane blight. Dark brown or purple spots (cankers) will form on primocanes ... For more information on aphid control, check out my article on how to get rid of aphids. These publications can be obtained from your county Extension office or the CFAES Publications online bookstore at estore.osu-extension.org. Raspberry-cane Diseases Most raspberry canes will be affected by viral or fungal diseases in time, causing gradual deterioration. The name blackberry is used to describe several species, including Rubus fruticosis (wild blackberry), Rubus ursinus and Rubus argutus, two species native to North America.Blackberries have three stem types: erect, arching, and trailing.