Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
The strawberry foliar nematode, Aphelenchoides fragariae, is a microscopic pest of strawberry foliage and crowns that also affects many ferns, herbaceous perennials and vegetatively…
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California red scale, Aonidiella aurantii, is a sap-feeding armored scale insect that most seriously affects citrus in warm regions of the United States. Immobile…
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The strawberry blossom weevil (Anthonomus rubi) is a small Eurasian weevil that attacks berry crops by feeding on young foliage and unopened flower buds.…
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The apple blossom weevil, Anthonomus pomorum, is a flower-bud-feeding weevil primarily associated with apple trees. Adults emerge from overwintering sites in early spring, feed…
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Woolly whitefly, Aleurothrixus floccosus, is a sap-feeding insect that primarily attacks citrus and may also occur on Eugenia. Immature stages live on leaf undersides…
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Agrotis segetum, commonly called the turnip moth, is an Old World noctuid whose caterpillars act as cutworms. They feed at night on seedlings, foliage,…
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Black cutworm, Agrotis ipsilon, is a nocturnal moth pest whose larvae attack young corn, vegetables, strawberries, turfgrass and many other plants. Small caterpillars chew…
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Dusky wireworm is the soil-dwelling larva of the click beetle Agriotes obscurus. It feeds on seeds, roots, crowns, stems and tubers, with grasses and…
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Agriotes lineatus is a European click beetle whose soil-dwelling larva is called a wireworm. The larvae feed on germinating seeds, roots, crowns, underground stems…
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Agrilus viridis is a metallic green, wood-boring jewel beetle found primarily in Europe and associated with beech, willow, birch, hazelnut and other broadleaf trees.…
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Emerald ash borer (Agrilus planipennis) is an invasive metallic-green beetle whose larvae tunnel beneath the bark of ash trees, disrupting phloem and cambial function.…
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A borsó-levéltetű (Acyrthosiphon pisum) főként borsón, lucernán, bükkönyön, lóbabon és más pillangósokon táplálkozó, szívó szájszervű kártevő. A fiatal hajtásokon és a virágzás–hüvelyképződés időszakában telepei…
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