![]() ![]() Toxic saliva of the potato (tomato) psyllid, Paratrioza cockerelliĮxact cause(s) unknown, chemical injury, viruses or other pathogens. Oxygen deficiency of tuber accompanying high soil temperatureĬarbohydrate translocation due to second growth Roughening of tuber skin due to physiological or environmental causes Oxygen deficiency of internal tuber tissue Photochemical oxidants (primarily ozone), sulfur oxides Phytoplasma infection or anything that constricts the stem, including but not limited to Rhizoctonia canker, heat necrosis, chemical injury, mechanical injury, wind injury Miscellaneous diseases and disorders Miscellaneous diseases and disorders The beet leafhopper-transmitted virescence agent Phytoplasmal diseases Phytoplasmal diseases Late blight spores germinate at humidity levels above 90 percent and temperatures between 50 and 78 degrees F. ![]() Genus Potyvirus, Wild potato mosaic virus (WPMV) Potato late blight is one of the most serious diseases of potatoes, caused by the fungus Phytophthora infestans, and the disease that single-handedly caused the Irish Potato Famine of the 1840s. Genus Geminiviridae, Tomato yellow mosaic virus (ToYMV) subgroup III Genus Tospovirus, Tomato spotted wilt virus (TSWV) Genus Tobamovirus, Tomato mosaic virus (ToMV) Genus Nepovirus, Tomato black ring virus (ToBRV) Genus Ilarvirus, Tobacco streak virus (TSV) Genus Necrovirus, Tobacco necrosis virus (TNV) Genus Tobamovirus, Tobacco mosaic virus (TMV) Genus Sobemovirus, Sowbane mosaic virus (SoMV) Geminiviridae, Solanum apical leaf curling virus (SALCV) subgroup III Genus Alfamovirus, Potato yellowing virus (PYV) Genus Geminiviridae, Potato yellow mosaic virus (PYMV) subgroup III Genus Nucleorhabdovirus, Potato yellow dwarf virus (PYDV) Genus Tobravirus, Tobacco rattle virus (TRV) ![]() Genus Potyvirus, Potato virus Y (PVY, strains O, N and C) Genus Furovirus, Potato mop-top virus (PMTV) Potato mop-top virus ( spraing of tubers) Genus Luteovirus, Potato leafroll virus (PLRV) Genus Carlavirus, Potato latent virus (PLV) Genus Geminiviridae Potato deforming mosaic virus subgroup III, (PDMV) Genus Nepovirus, Potato black ringspot virus (PBRSV) Genus Potexvirus, Potato aucuba mosaic virus (PAMV) ![]() Genus Rhabdovirus, Eggplant mottle dwarf virus (EMDV) Genus Cucumovirus, Cucumber mosaic virus (CMV) Genus Curtovirus, Beet curly top virus (BCTV) Genus Nepovirus, Arracacha virus B Oca strain (AVB-O) Genus Comovirus, Andean potato mottle virus (APMV) Genus Tymovirus, Andean potato latent virus (APLV) Genus Alfamovirus, Alfalfa mosaic virus (AMV) Viral and viroid diseases Viral and viroid diseases atrosepticumĬlavibacter michiganensis subsp. USABlight was created with funding from UDSA’s Agriculture and Food Research Initiative (AFRI) Competitive Grants Program Grant 2011- 68004-30154.This is a list of diseases and disorders found in potatoes.īacterial diseases Bacterial Diseases Click here for an informative pamphlet on the disease Knowing where the disease is present can help improve the efficacy of fungicide treatments. Yield losses caused by late blight and the cost of control measures have been estimated to exceed 6.7 billion dollars annually and the disease is a major threat to food security worldwide. Under favorable weather conditions, tomato and potato crops can be destroyed within days if left untreated. Late blight of potato and tomato caused by Phytophthora infestans is a devastating disease worldwide and led to the Irish potato famine in 1845. There are also useful links to a decision support system, and information about identification and management of the disease. You can report disease occurrences, submit a sample for genotyping, observe current and past disease occurrence maps, and sign up for text disease alerts in your area. Welcome to USABlight, a national website that acts as an information portal on late blight. ![]()
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