Disease
Ascochyta leaf and pod blight of pea
Ascochyta pisi Lib.Ascochyta pisi causes a fungal leaf and pod spot disease of garden and field pea in the United States. Symptoms include tan to brown,…
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Plant problem library
Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
Disease
Armillaria Root Rot (Honey Fungus)
Armillaria melleaArmillaria root rot is a persistent soilborne fungal disease caused here by Armillaria mellea, commonly called honey fungus or oak root fungus. It attacks…
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Pest
Spanish Slug
Arion vulgaris Moquin-Tandon, 1855The Spanish slug, Arion vulgaris, is a large, highly polyphagous terrestrial slug that can severely damage vegetable seedlings, leafy crops, strawberries, ornamentals and emerging…
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Pest
Large rose sawfly
Arge rosae (taxonomic name variably treated; often associated with Arge ochropus, while Arge pagana is also called large rose sawfly in some references)Arge rosae is a taxonomic name associated in reference databases with rose-feeding sawflies, especially the large rose sawfly complex now treated under Arge ochropus…
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Disease
Apple stem grooving virus
Capillovirus maliApple stem grooving virus is a graft-transmitted viral disease of apple and other woody fruit crops. Most commercial apple cultivars remain symptomless, but susceptible…
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Disease
Apple mosaic virus
Ilarvirus ApMVApple mosaic virus is a graft- and root-graft-associated viral disease of apple. Infected leaves develop irregular cream, yellow or white mottling, often along veins;…
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Disease
Apple Chlorotic Leaf Spot
Apple chlorotic leaf spot virus (ACLSV), genus Trichovirus, family BetaflexiviridaeApple chlorotic leaf spot virus is a graft-transmitted virus of apple and other woody plants in the rose family. Many commercial apple cultivars carry…
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Disease
Sycamore Anthracnose
Apiognomonia venetaSycamore anthracnose is a fungal disease of sycamores and plane trees caused by Apiognomonia veneta. It is most damaging during cool, wet springs, when…
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Disease
Oak anthracnose
Apiognomonia errabundaOak anthracnose is a cool, wet-weather fungal disease associated with Apiognomonia errabunda, especially on oak leaves, shoots, and twigs. Early infections may produce vein-associated…
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Pest
Green Apple Aphid
Aphis pomiThe green apple aphid, Aphis pomi, is a sap-feeding pest of apple and related plants in the rose family. Colonies gather on tender shoot…
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Pest
Melon aphid (cotton aphid)
Aphis gossypii GloverMelon aphid, also called cotton aphid, is a small, highly variable aphid that colonizes tender shoots and leaf undersides of cucurbits, cotton, citrus, okra,…
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Pest
Black Bean Aphid
Aphis fabaeThe black bean aphid (Aphis fabae) is a small, soft-bodied sap-feeding insect that can form dense colonies on beans, beets, celery, potatoes, flowers and…
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