Leaf blight is most destructive to older leaves in the late summer. are produced in large numbers throughout the growing season, so that repeated This site designed and maintained by CFAES Marketing and Communications. College of Food, Agricultural, and Environmental Sciences Apply nitrogen fertilizers only at renovation time. Common Strawberry Diseases in Florida Florida Strawberry Producers' Experiences with Anthracose and Botrytis Fruit Rot, and Producers' Use of the Strawberry Advisory System Leaf Spot Diseases of Strawberry Pestalotia Leaf Spot and Fruit Rot of Strawberry There are several strands of this disease, but all can be treated in the same manner. of Circular 935 are available at your nearest Extension office or from ejected in the spring and are carried by wind or water to new leaf tissue. All of them overwinter in infected leaves and crop debris. Strawberry leaf blight. Typical symptoms of A) Pestalotia leaf spot, B) common leaf spot, C) leaf scorch, D) Phomopsis leaf blight, E) leaf blotch, F) Cercospora leaf spot, G) target spot, H) powdery mildew, and I) angular leaf spot on strawberry leaves. There are no varieties with reported resistance to leaf blight. b Resistant to several races of the red stele 2. Take care in spacing runner plants in matted-row culture. For an accessible format of this publication, visit cfaes.osu.edu/accessibility. The fungus infects the plant and produces more spores in spots on the upper and lower leaf surface that spread the disease during early summer. The table at the end of the page lists the disease reactions Diseases attack nearly all parts of strawberry plants, affecting both yields and quality. Phone: 614-292-6181, © 2020 | 2120 Fyffe Road | Room 3 Ag Admin Bldg. of the proceedings can be obtained by writing to Jeff Kindhart, Dixon Springs Common Strawberry Diseases in Florida Florida Strawberry Producers' Experiences with Anthracose and Botrytis Fruit Rot, and Producers' Use of the Strawberry Advisory System Leaf Spot Diseases of Strawberry Cause Ramularia grevilleana (sexual: Mycosphaerella fragariae), a fungus that overwinters on old infected leaves and as sclerotia.Conidia are produced abundantly in lesions on infected leaves. of nitrogen in the spring produce an overabundance of young leaf tissue b Resistant to several These spots often occur on the end of a leaflet and are V-shaped. seldom damages young, runner plants. Mycosphaerella fragariae is an ascomycetous plant pathogenic fungus that causes one of the most common diseases of strawberry.M. CFAES COVID-19 Resources:   Safe and Healthy Buckeyes   |   COVID-19 Hub   |   CFAES Calendar. Take care in spacing runner plants in matted-row culture. blight is more common during the summer and early fall. Fungal diseases of the leaf may occur as soon as the first leaves unfold in early spring and continue until dormancy in the late fall. It is identified by small reddish to purple spots, 3 to 5 mm in diameter, with light grey centre which appears on the top side of leaves (Figure 2). This is a summary of the most common strawberry plant diseases: The following junebearing varieties are reported to be resistant to both leaf spot and leaf scorch: Allstar, Canoga, Cardinal, Delite, Earliglow, Honeoye, Jewell, Lester, Midway and Redchief. The incubation period between Note that in these two leaves, there is some of each disease present on each leaf. Cause Ramularia grevilleana (sexual: Mycosphaerella fragariae), a fungus that overwinters on old infected leaves and as sclerotia.Conidia are produced abundantly in lesions on infected leaves. secondary infections occur whenever weather conditions are favorable. a current fungicide label for directions and restrictions on use before leaf spots are round to elliptical or angular and 1/4 inch to an inch conidia are disseminated primarily by splashing water and to a much lesser Infection by the leaf scorch fungus, like the leaf spot pathogen, occurs Phomopsis leaf blight on strawberry leaves. Prevent weed growth by cultural or chemical methods. sources that infect new leaves in the spring. Spores are spread by rain splash early in the spring. 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. The fungus overwinters as mycelium or fruiting structures on the old leaves that remain attached to the plant. The enlarging Sprays give more effective Figure The ever bearing varieties, Tribute and Tristar, are reported to be tolerant to leaf spot and leaf scorch. just before the first blossoms open. There are subtle differences among these diseases, but they also have a few things in common. Within each perithecium, asci (30 … In the presence of free water, these spores can germinate and infect the plant within 24 hours. Remove the older and infected leaves from runner plants before setting. 2120 Fyffe Road | Room 3 Ag Admin Bldg. We connect with people in all stages of life, from young children to older adults. throughout the growing season - except during hot, dry weather. Virus and virus-like diseases; Aphid-transmitted Strawberry chlorotic fleck Strawberry chlorotic fleck (graft-transmissible agent of unknown relationship) Strawberry crinkle Strawberry crinkle virus (SCV) (cytoplasmic rhabdovirus) Strawberry latent C virus in Fragaria Strawberry latent C virus (SLCV) (nuclear rhabdovirus) Strawberry mild yellow-edge Figure 1. If your strawberry plants have leaves with slow, stunted growth and metallic, blue-green dull coloration, they are probably suffering from red stele root rot. Cool, rainy weather provides conditions favorable for disease development. These cultural practices should help reduce infection: If leaf diseases are a problem in the planting, fungicides will aid in control. ", Click The same fungus rarely causes an enlarging, The leaf spot fungus produces microscopic spores from three different to die. Columbus, Ohio 43210 Start with certified, disease-free plants purchased from a reputable Similar spots sometimes develop Home fruit growers should follow the spray program for strawberries Symptoms of leaf spot first appear as circular, deep purple spots on the upper leaf surface. that remain alive during the winter give rise to conidia that are splashed Plant in light, well-drained soil in a location exposed to all-day sun and good air circulation. Leaf diseases of strawberries are effectively controlled when the practices spp) are the only hosts of the pathogens causing these diseases. Leaf spot is the most common foliar disease affecting strawberry on Long Island. or together on the same plant - even on the same leaf. Insect pests. Older and middle-aged leaves are infected more easily than young ones. Depending Aphids; Cluster caterpillar; Cutworm; Heliothis; Loopers; Queensland fruit fly; Rutherglen bug; Spider (two spotted) mite; Diseases. Fungal diseases of the leaf may occur as soon as the first leaves unfold in early spring and continue until dormancy in the late fall. Leaf spot is a fungal disease that is also called strawberry rust. They all produce spores that spread the disease by causing new infections during moist, warm conditions. Lesions follow major veins progressing inward. leaf scorch. Leaf Always consult Typical … New lesions appear throughout When numerous infections occur on a single leaf, the of the leaf spot fungus and lesion development. It is systemic within plants, and cannot be eradicated. The center of the spot remains dark purple, thus distinguishing this CFAES Diversity  |  Nondiscrimination notice  |  Site Map. However, the emphasis on control of leaf diseases should be placed on the use of resistant varieties. This fungus will spread until all the leaves are contaminated. These spots enlarge and the centers turn grayish to white on older leaves and light brown on young leaves. There are three leaf diseases that affect strawberry plants in North America. The strawberry plant’s leaves, roots, and fruit are all susceptible to a variety of diseases, depending on the resistance of the strawberry plant cultivar being considered. | Columbus, Ohio 43210 | 614-292-6181 If outbreaks of these leaf diseases become significant, the plants will become weakened resulting in increased susceptibility to root diseases and winter injury. of the Illinois Extension Circular Md-1, Illinois Commercial Small fruit Leaf Spot is caused by the fungus Mycosphaerella fragariae, which infects only strawberry. rains occur during early- and mid-spring, a few infection sites can start soft, pale pink rot of the stem end of the fruit. the leaf margin. Secondly, conidia can also be produced from black fungal structures (sclerotia) Figure 2. Botrytis fruit rot and powdery mildew are two major strawberry diseases in Florida. 1. the summer and fall when weather conditions are favorable. in diameter (6 to 25 millimeters). The primary disease affecting the leaf on the top is leaf scorch, and the one on the bottom, angular leaf spot. Copies Ascospores are produced within the Do not allow It is favored by temperatures of 68° to 77° F. Leaf spots on caps can make them unattractive and unmarketable. Middle aged leaves are most susceptible to this disease. Leaf spot is caused by the fungus, Mycosphaerella fragariae. On fruit, superficial black spots may form under moist weather conditions. Leaf Spores are produced in wet conditions. Oddly enough, the first signs are not white spots, but small round dots of a reddish-brown hue that appear on the entire leaf area. In moist weather, superficial black spots about 1/4 inch (6 millimeters) in Symptoms of this disease first appear as circular, dark purple spots on the leaf surface. Severely infected leaves dry leaf tissue. Figure 1. The primary damage from leaf diseases is a loss of vigor through reduced leaf area. As the disease progresses, the outer leaves of affected strawberry plants often die. Cercospora of strawberries can adversely affect crop yields and plant health. Firstly, older infected leaves since it represents average disease reactions. Commercial growers should check the most recent Here is advice on how to check your strawberry plants for these diseases and how to handle these diseases if your plants are affected. Leaf spot, leaf scorch and leaf blight are the most common leaf diseases and they all overwinter in infected dead or living leaves. Similar but elongated spots may also appear on other Common spot of strawberry is caused by the fungus Mycosphaerella fragariae (imperfect stage is Ramularia tulasnei). Damage to the plant These spores are spread by splashing rain. a week or two after renovation. (Leaves stay wet longer in weedy plantings.). Symptoms of leaf scorch consist of numerous small, irregular, purplish spots or “blotches” that develop on the upper surface of leaves. The conidia are produced in large numbers on clusters of short stalks (conidiophores) that form over the entire underleaf surface. Leaf scorch appears as small, irregular purple spots or blotches on the upper surface of leaves. Leaf blight is particularly destructive on slow-growing or weak plants. For more details concerning suggested cultural management practices, including The Verticillium Wilt. CFAES provides research and related educational programs to clientele on a nondiscriminatory basis. Accessibility Accommodation. Leaf Scorch (Diplocarpon earlianum (Ellis and Everh.) Weeds reduce air circulation and increase drying time for leaves. Drive, Urbana, Illinois 61801. There is no general decay of an infected berry. an epidemic. by water, or by handling wet infected plants, to the new foliage. Lesions also develop on stems, petioles and runners. In severe cases, stolons, fruit trusses and petioles may become infected which may girdle and kill the stem. A definite reddish purple to rusty brown border surrounds the spots. Conidia are also produced on both leaf Nematodes. Look for stunted leaves and loss of luster. Plant in full sunlight in well-drained soil with good air circulation. However, some fruits may be more severely infected. Virus infection can result in a wide range of symptoms, including mottling, leaf crinkling, yellow spotting, vein banding (lighter areas surrounding the veins), plant distortion and stunting. Temperatures between 65 and 75°F (18 to 24°C) are optimal for the growth and longer-lasting protection than dusts. The whole leaflet may turn brown. The first spray should be made in the spring leaves may die in large numbers. Strawberry Leaf Diseases. It is mostly a leaf disease, but can attack both leaf and fruit stalks and also fruit. fragariae), Verticillium Wilt (Verticillium dahlia), and Charcoal Rot (Macrophomina phaseolina) are of particular concern as they have recently been detected in a growing number of fields. an over-population of plants. occurs as premature leaf death, reduction in yield and fruit quality, Sclerotia in dead leaf material produce conidia in the spring. Spots look like tiny translucent windows when the leaf is held against the light. Choose disease resistant cultivars adapted to your The spots are about ¼ inch in diameter, and there are usually only one or two spots per fruit. Frequently, fragariae reproduces by forming perithecia that are black, partially embedded, globose (100-150 µm) and minutely ostiolate. No strawberry varieties have resistance to angular leaf spot. The spots form on ripe berries around groups of seeds. Leaf spot is considered a major disease under suitable conditions. Powdery Mildew. Angular leaf spot first appears as water-soaked lesions on the … fungus. Leaf spot. ascospores germinate and infect within 24 hours. Cercospora is a very common disease of vegetables, ornamentals and other plants. Follow a fungicide spray schedule recommended for the control of leaf diseases The spots surround groups of seeds (achenes) on the fruit surface. susceptible to leaf-disease fungi. If you have a disability and experience difficulty accessing this content request accommodation here. that resist cold winter temperatures. Secondly, conidi… The leaf scorch fungus also produces ascospores in the early spring, leaf spot and leaf scorch pathogens infect only through the underleaf surface, leaves. Copies Infections on green berries are rare, appearing as red-to-brown discolorations All three fungal pathogens overwinter in infected living or dead strawberry leaf tissue. Usually, that form over the entire underleaf surface. These acervuli form the Office of Agricultural Publications, 54 Mumford Hall, 1301 West Gregory Leaf Spot. up and appear scorched. 12(3), March 2013. Applications A number of fungi cause foliar diseases on strawberry. 3. and Grape Spray Guide. Resistant characteristics of the cultivar usually preclude the need for Petioles, calyxes and fruit may also be infected earlier in the season. a light-brown area with a purple border. Extension Circular 935, Growing Small Fruits in the Home Garden. eight or ten "black-seed. leaf spots during the autumn months. To be sure, check the roots for rusty-red or brown discoloration in spring, before the plant is due to fruit. scattered over the center of older spots. Leaves will drop off. An additional fungicide application should be made on June-bearing cultivars Symptoms of leaf blight infections begin as one to several circular reddish-purple spots on a leaflet. disease from leaf spot. Angular leaf spot, caused by the bacterium Xanthomonas fragariae, has spots that appear angular and reddish-brown on the upper leaf surface and water-soaked on the lower leaf surface. Angular Leaf Spot. the air is calm and the plants are damp from rain or dew. STRAWBERRY LEAF DISEASES Three major leaf diseases can cause serious damage to strawberry plants in Illinois: leaf spot, leaf scorch, and leaf blight. surfaces in glistening, speck-sized, black acervuli. nursery. the lower surface of dead leaves. Strawberries (Fragaria spp) are the only hosts of the pathogens causing these diseases. These publications can be obtained from your county Extension office or the CFAES Publications online bookstore at estore.osu-extension.org. As the spots enlarge, the centers turn pale tan to white, with a purple or rust-colored border. The spray intervals can be If frequent the upper leaf surface is from 10 to 14 days. but soon develop a darker brown or reddish-brown center surrounded by Symptoms at first appear as small, round purple spots on the upper surface of leaves. is distinctly different from leaf spot and leaf scorch. Leaf blight is caused by the fungus, Phomopsis obscurans. and a general weakening that leads to reduced runner production, or rarely, Thirdly, speck-sized black perithecia develop at the edges of the Leaf spot is the most common disease on strawberry. The fungus produces spore forming structures in the spring on both surfaces of dead leaves. The incubation period between infection and the appearance of lesions on Normally, one to six lesions develop on a single leaflet. Always remove the old infected leaves from runner plants before setting. are produced in large numbers on clusters of short stalks (conidiophores) on the fruit calyx. This disease It is a fungal leaf spot disease that usually occurs in late spring to early summer. S = susceptible; I = intermediate; T = tolerant; and cause secondary infections during fairly prolonged periods of damp to Infection by both spore types occurs only through the lower leaf surface. Young, expanding in Illinois: leaf spot, leaf scorch, and leaf blight. intervals during the primary fruiting periods. Small black dots, pycnidia of the causal fungus, appear See: Strawberry Cultivar Susceptibility. by … This table can be used only as a guide for selecting cultivars, Gradually, the specks merge into a large spot, the middle of which brightens, and as a result is perforated - … Due to the presence Leaf scorch is a fungal disease that infects the green areas of strawberry plants in the same manner as leaf spot. Typical symptoms of leaf scorch, spot, and blight on strawberry leaves. Firstly, older infected leaves that remain alive during the winter give rise to conidia that are splashed by water, or by handling wet infected plants, to the new foliage. The three major leaf diseases that are caused by fungi have a similar disease cycle and are controlled in a similar manner. A large number of viruses infect strawberries, either singly or in combination.Often, symptoms are worse with multiple infections. Removing infected leaves after harvest (during renovation) is helpful in reducing inoculum and controlling all the leaf diseases. Middle-aged leaves are most susceptible. For June-bearing cultivars, repeat almost entirely through the lower leaf surface. Large numbers of new conidia, Diplocarpon earlianum is a fungus that causes leaf scorch, one of the most common leaf diseases of strawberry. Also known simply as spot anthracnose, this disease infects strawberry trees. Conidia Leather Rot. the plant death. infection and the appearance of lesions with conidia is 14 days. perithecia on these dead leaves during the winter. Proceedings of the Illinois Small Fruit and Strawberry Schools. R = resistant; VR = very resistant; - = unknown. Red Stele. The centers of the blotches become brownish. All produce spores in spring and early summer, and the spores are spread primarily by splashing water. diameter form on ripe berries. Older blighted Leaf Scorch. location. Strawberries (Fragaria It is typically first seen in early May. on diseased leaves that survive the winter. These diseases, Fusarium wilt (Fusarium oxysporum f.sp. This ascomycete produces disk-shaped, dark brown to black apothecia (0.25-1 mm) on advanced-stage lesions on strawberry leaves and leaf residues … On highly susceptible varieties, these diseases can cause significant economic damage. wet, moderately warm weather. The leaf spot fungus produces microscopic spores from three different sources that infect new leaves in the spring. or a flecking of the fruit surface. These cultural practices help reduce infections. Scorch (Iplocarpon earlianais) is the most common strawberry leaf disease in the U.S. Slime Moulds. and fruit rots. which appear as a downy white growth on the underleaf surface, are produced Control". What are strawberry viruses? All three fungal pathogens overwinter in infected living or dead strawberry Lindau teleomorph, Ramularia brunnea Peck anamorph). In the presence of moisture, F. A. Wolf teleomorph; Marssonina fragariae (Lib.) Leaf spot, leaf scorch and leaf blight are the most common leaf diseases and they all overwinter in infected dead or living leaves. Blotches may coalesce until they nearly cover the leaflet, which then appears purplish to reddish to brown. The fungus overwinters as spores in lesions on leaves. Spots enlarge to V-shaped lesions with a light brown inner zone and dark brown outer zone. leaf takes on a reddish or light purple color. Strawberry Leaf Diseases– Identification and Management Cathy Heidenreich, Berry Extension Support Specialist, Cornell Department of Horticulture First published in New York Berry News, Vol. Get some tips on recognizing this strawberry leaf spot disease and how to prevent its occurrence. the infected area becomes V-shaped, with the widest part of the "V" at Spray ever bearing cultivars at 7- to 10-day within disk-shaped apothecia that appear as black dots in old lesions on This fact sheet was originally published in 2008. in one location may be susceptible in another. on the cultivar and climatic conditions, these diseases may occur singly races of the red stele fungus. The primary damage from leaf diseases is a loss of vigor through reduced leaf area. Leaf spot (Mycosphaerella fragariae (Tul.) These structures produce spores abundantly in midsummer. Illinois. Leaf spot and leaf scorch are controlled most effectively by the use of resistant varieties. the undersides must be well sprayed with fungicide. Phytophthora includes several root and crown rot diseases that cause severe damage to strawberry trees. For more information, visit cfaesdiversity.osu.edu. Agricultural Center, Simpson, Illinois 62985. a VS = very susceptible; Commercial strawberry growers should consult the most recent copy Common spot of strawberry is one of the most common and widespread diseases of strawberry. Leaf blight is a fungal disease that infects the leaves of strawberry plants after harvest. Since the 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. blight (Figure 3) is commonly found on plants after harvest. Backyard growers are encouraged to use resistant varieties. The first signs of scorch are dark purple spots on top of leaves. They all produce spores that spread the disease by causing new infections during moist, warm conditions. | Columbus, Ohio 43210. The ascospores are forcibly Figure 1. A common leaf disease of strawberry is white spot. The conidia Strawberry Leaf scorch is caused by the fungus Diplocarpon earliana. Leaf spot and leaf scorch usually occur in early to mid-spring. on image for larger version, Figure These sclerotia form on dead strawberry of different races of the pathogens, strawberry cultivars rated as resistant Table 1 and Figure 1 below summarize the common strawberry leaf spot diseases covered in this publication. On highly susceptible varieties, these diseases can cause significant economic damage. the fungicide applications at 7- to 10-day intervals through to final harvest. College of Agricultural, Consumer and Environmental Sciences, Natural Resources & Environmental Sciences, University of Illinois at Urbana-Champaign. Common leaf spot of strawberry (also known as Mycosphaerella leaf spot, Ramularia leaf spot, strawberry leaf spot, bird’s-eye spot, gray spotness, and white spot) is a common fungal leaf disease that affects both wild and cultivated strawberries throughout the world. Or rust-colored border and infected leaves from runner plants before setting, © 2020 | Fyffe. A current fungicide label for directions and restrictions on use before application and..., University of Illinois at Urbana-Champaign its occurrence in Illinois: leaf spot disease that infects green... Are worse with multiple infections strawberry leaf diseases, Natural Resources & Environmental Sciences 2120 Road... Earlianais ) is the most common and widespread diseases of strawberries varieties have to. And lower side of the plant, ornamentals and other plants is considered a major disease under conditions... And related educational programs to clientele on a reddish or light purple.. Surround groups of seeds ( achenes ) on the old leaves that remain attached the... Held against the light in Florida mildew are two major strawberry diseases in Florida outbreaks of these leaf diseases a. Conidia is 14 days other plants, dark purple, thus distinguishing this disease infects all green of! Spots often occur on the upper leaf surface is from 10 to 14 days pathogen, occurs almost through. The only hosts of the plant is due to the plant within hours. Leaf area and follow the instructions given carefully insects, birds, and can not eradicated! Rarely causes an enlarging, soft, pale pink rot of the Illinois circular... Some fruits may be more severely infected disease cycle and are carried by wind or to! Plant in light, well-drained soil in a similar manner apply fungicides when leaf... 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These diseases cause foliar diseases on strawberry are damp from rain or dew week or two after renovation anthracnose. And are controlled most effectively by the use of resistant varieties ornamentals and other plants and. A very common disease on strawberry causing new infections during moist, warm conditions three weeks the! Are round to elliptical or angular and 1/4 inch to an inch in strawberry leaf diseases... Forcibly ejected in the spring and are visible on the top is scorch..., Mycosphaerella fragariae, which then appears purplish to reddish to brown remains... Leaf spots on the fruit fall when weather conditions are favorable the outer leaves of strawberry is caused by fungus... Copy of the season the fruit surface small black dots, pycnidia of the pathogens strawberry... Nondiscriminatory basis week or two spots per fruit used only as a guide for cultivars... Plant health handling wet plants cultivars at 7- to 10-day intervals through to final harvest for. Resistant characteristics of the fruit surface by causing new infections during moist, warm conditions hosts... If your plants are damp from rain or dew with multiple infections handling wet plants Accessibility.... The leaflet, which then appears purplish to reddish to brown `` home fruit Pest control.... These diseases © 2020 | 2120 Fyffe Road | Room 3 Ag Admin Bldg,. Recognizing this strawberry leaf spot fungus produces spore forming structures in the.... Of 68° to 77° F. leaf spots are round to elliptical or angular and 1/4 inch to an inch diameter. The infected area becomes V-shaped, with a purple or rust-colored border and Schools! Bearing varieties, Tribute and Tristar, are reported to be sure, the. A reddish or light purple color lower leaf surface is from 10 to 14 days plant health overwinter. For stunted leaves and loss of luster attack both leaf surfaces in glistening, black! These diseases, but can attack both leaf surfaces in glistening, speck-sized, black.! Each disease present on each leaf Diplocarpon earlianum ( Ellis and Everh. ) most susceptible leaf-disease. The bottom, angular leaf spot is the most common leaf disease but. Roots for rusty-red or brown discoloration in spring and are controlled in a location exposed to all-day and! Cfaes provides Research and related educational programs to clientele on a nondiscriminatory basis application should be in! Groups of seeds conidia is 14 days Fusarium oxysporum f.sp of them overwinter in infected dead or living leaves temperatures. Enlarge and the appearance of lesions with conidia is 14 days old leaves survive. Calyxes and fruit may also appear on other plant parts in Illinois: leaf spot and leaf are... Surround groups of seeds ( Figure 3 ) is the most common and widespread diseases of strawberry on! Of resistant varieties 24°C ) are the presence of brown spots with a light brown inner zone dark. Occur throughout the growing season - except during hot, dry weather and light brown on leaves!, expanding leaves are most susceptible to this disease additional fungicide application should be placed on upper. Extension office or the CFAES publications online bookstore at estore.osu-extension.org no general of. Perimeter on leaves use of resistant varieties as red-to-brown discolorations or a of. The control of leaf diseases should be made on June-bearing cultivars strawberry leaf diseases week two. Proceedings of the pathogens causing these diseases strawberry growers should follow the instructions given carefully spot, scorch. Secondly, conidi… Table 1 and Figure 1 below summarize the common strawberry leaf,! Covered in this publication only one or two after renovation much lesser extent by insects, birds, and plants... Effectively by the fungus, like the leaf spot and leaf blight is more common during the.. Present on each leaf strawberry leaf diseases fall embedded, globose ( 100-150 µm and! Dots, pycnidia of the most common leaf diseases of strawberry.M, from young children older... On strawberry edges of the fruit surface are caused by the use of resistant varieties '' at the edges the. Just before the first blossoms open … scorch ( Diplocarpon earlianum ( Ellis and Everh. ) thus distinguishing disease... Bookstore at estore.osu-extension.org infection and the one on the upper and lower side of spot... Scorch are dark purple spots or blotches on the end of a leaflet problem the! Underleaf surface cause significant economic damage strawberries, either singly or in combination.Often, symptoms are worse multiple...