11/7/2023 0 Comments Early blight and late blightPrefer to view disease-resistant variety information in spreadsheets? Download disease-resistant variety spreadsheets from this Box folder.Follow links below to tables with more details about these varieties including seed companies marketing them and whether organic seed is available, as well as variety resistance to disorders. Potato (Solanum tuberosum) early blight, caused by Alternaria solani is one of the most destructive fungal foliar diseases.Late Blight needs high humidity but can affect plants throughout the whole growing season. These conditions can often be found early on in the growing season, hence its name. Early Blight starts to show up in warm conditions (> 15C/59F) during a wet period. Occasionally varieties are listed as resistant without the disease(s) or disorder(s) specified. Late blight needs living material to survive and does typically not overwinter. Early blight (EB), caused by Alternaria species, is one of the major diseases in the production of tomato (Solanum lycopersicum), potato (Solanum tuberosum) and other plants, and is most prevalent on unfertilized or otherwise stressed plants. Infection often occurs before blossoming. Late blight: high humidity temperatures between 60 and 80F wind-, rain-, and soil-borne. It is not a true fungus but rather an oomycete, in a group of organisms. Disease symptoms are character- istic dark brown. The disease affects leaves, stems, and tubers, and can reduce yield, tuber. ![]() Information is from seed catalogs for 2018, 2019, 20. Early blight: high humidity temperatures above 75F transmission hastened by wind, heavy dew, and frequent rain poor plant nutrition contributes. Early blight is one of the most common tomato and potato diseases, occurring nearly every season in Minnesota. Late blight on tomatoes (or potatoes) is caused by the organism Phytophthora infestans. Early blight caused by Alternaria solani Sorauer is a major foliar diseases of potato (Solanum tuberosum L.). Early blight of potato is caused by the fungal pathogen Alternaria solani.
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