Pest
Clover mite
Bryobia praetiosaClover mite, Bryobia praetiosa, is a tiny reddish-brown plant-feeding mite most often associated with cool-season turfgrass, clover and weeds in the United States. Feeding…
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Plant problem library
Detailed profiles of common plant diseases, pests, nutrient deficiencies and environmental problems.
Pest
Káposzta-levéltetű
Brevicoryne brassicaeA Brevicoryne brassicae, vagyis a káposzta-levéltetű, a káposztafélék viaszos, szürkészöld levéltetve. Tömeges kolóniái főként a fiatal leveleken, hajtáscsúcsokon, virágrügyeken és a fejképző részek mélyén…
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Disease
Shallow Bark Canker of Walnut
Brenneria nigrifluensShallow bark canker is a bacterial disease associated primarily with English walnut, caused by Brenneria nigrifluens. It produces scattered brown-to-black bark spots, shallow necrotic…
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Disease
Lettuce Downy Mildew
Bremia lactucae RegelLettuce downy mildew is a cool-weather foliar disease caused by the obligate oomycete Bremia lactucae. It produces pale green to yellow angular lesions on…
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Disease
Fava Bean Chocolate Spot
Botrytis fabaeFava bean chocolate spot is a fungal disease associated with Botrytis fabae, especially during cool, wet and humid weather. It starts as small red-brown…
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Disease
Botryosphaeria canker and dieback
Botryosphaeria dothidea (Moug. ex Fr.) Ces. & De Not.Botryosphaeria dothidea is a wound- and stress-associated fungus that causes cankers, shoot or branch dieback, blights and fruit rots on many woody plants. In…
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Disease
Cherry leaf spot
Blumeriella jaapii (Rehm) ArxCherry leaf spot is a fungal disease caused by Blumeriella jaapii, especially damaging to tart and sour cherries in humid growing regions of the…
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Disease
Cereal Powdery Mildew
Blumeria graminisCereal powdery mildew is a fungal disease complex caused by host-specialized forms of Blumeria graminis. It produces distinctive white to gray, flour-like colonies on…
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Disease
Bipolaris Leaf Spot, Spot Blotch and Common Root Rot
Bipolaris sorokinianaBipolaris sorokiniana is a seed- and residue-associated fungal pathogen of grasses that causes spot blotch and common root rot in wheat and barley, black…
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Disease
Black Root Rot
Berkeleyomyces basicolaBlack root rot is a persistent soilborne disease caused by the fungus Berkeleyomyces basicola, formerly known as Thielaviopsis basicola. It attacks roots and sometimes…
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Pest
Sweetpotato whitefly
Bemisia tabaci species complexSweetpotato whitefly, Bemisia tabaci, is a small sap-feeding pest complex that attacks vegetables, field crops, ornamentals and weeds throughout warm regions of the United…
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Disease
Rhizomania of Sugar Beet
Beet necrotic yellow vein virus (BNYVV)Rhizomania is a serious soilborne viral disease caused by beet necrotic yellow vein virus (BNYVV), especially damaging to sugar beet. Infected plants may remain…
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