Pest
Stem and Bulb Nematode
Ditylenchus dipsaciStem and bulb nematode, also called bloat nematode, is a microscopic plant-parasitic roundworm that attacks garlic, onions, leeks and other crops. Infested plants may…
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Plant problem library
Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
Pest
San Jose scale
Diaspidiotus perniciosusSan Jose scale is a small armored scale insect that infests fruit, nut, ornamental and other woody plants in the United States. Crawlers and…
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Pest
Asian Citrus Psyllid
Diaphorina citri KuwayamaThe Asian citrus psyllid, Diaphorina citri, is a small sap-feeding insect that attacks tender citrus flush and closely related Rutaceae plants. Its direct feeding…
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Pest
Citrus whitefly
Dialeurodes citriCitrus whitefly, Dialeurodes citri, is a sap-feeding pest that primarily attacks citrus but may also colonize several ornamental and fruit trees. Nymphs live on…
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Pest
Western Corn Rootworm
Diabrotica virgifera virgifera LeConteWestern corn rootworm, Diabrotica virgifera virgifera, is a major insect pest of corn in the United States. Its larvae feed underground on corn roots,…
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Pest
Gray field slug
Deroceras reticulatumThe gray field slug, Deroceras reticulatum, is a shell-less mollusk and important pest of vegetable crops, strawberries, field crops, grasses, nurseries and seedlings in…
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Pest
Cabbage Maggot
Delia radicumCabbage maggot is the root-feeding larva of the small gray fly Delia radicum. It attacks young cabbage-family crops, especially during cool, wet spring weather.…
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Pest
Seedcorn maggot
Delia platuraSeedcorn maggot is the larval stage of the small gray fly Delia platura. The legless larvae feed below the soil surface on planted seeds,…
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Pest
Onion Maggot
Delia antiquaThe onion maggot, Delia antiqua, is a soil-dwelling fly pest of onions and other Allium crops. Its creamy-white larvae tunnel into seedlings, basal stems…
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Pest
Brassica pod midge
Dasineura brassicaeBrassica pod midge, Dasineura brassicae, is a small fly whose larvae develop inside pods of oilseed rape and related brassicas. Infested pods become yellow,…
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Pest
Codling moth
Cydia pomonellaCodling moth (Cydia pomonella) is a major internal fruit-feeding pest of apples, pears and English walnuts in the United States. Newly hatched caterpillars quickly…
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Pest
Box Tree Moth
Cydalima perspectalis (Walker)Box tree moth, Cydalima perspectalis, is an invasive caterpillar pest that primarily attacks boxwood (Buxus spp.). Larvae skeletonize and web leaves, produce green-black frass,…
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