Eggplant early blight: Symptoms: Eggplant early blight mainly damages the leaves. The lesions are round or nearly round, brown on the edges, gray on the middle, concentric ring, and when the humidity is high, a gray-black mold layer grows on the lesion. The middle of the lesion was later embrittled and the diseased leaves were severely shed.
Pathogens and pathogenicity: 1. Infected by Demiomycete and Alternaria genus. 2, infestation cycle. The pathogenic bacteria overwinter in diseased body or attached seeds. When conditions are appropriate in the second year, infestation and parasitism occur early in the seedling stage and adult plants can also develop disease. However, the disease is not as serious as the tomato early blight. Spores are produced on the lesions and transmitted through wind and rain, airflow, and irrigation water. , and then infect. 3, disease conditions. The suitable temperature range of eggplant early blight fungus is wider, humidity is the main condition of disease. When the temperature is about 15 degrees, the relative humidity is more than 70%, the disease begins to occur. Therefore, when the rainy season comes early, the incidence is most serious when the rainfall is large. 4. Seed Disinfection: Soak the seed for 30 minutes with the ratio of 50 grams of water and 15 kilograms of rot disease. Remove and rinse with clean water and then dry. Do germination treatment. [Rotten disease] from Shijiazhuang City, Hebei Province Agricultural Science and Technology Development Co., Ltd. production 0311-87831639, 87753859. 5, severe disease fields and non-sweetse crop rotation more than three years. 6, drug control: the early onset of the use of [rot disease must] 600 times liquid or 64% antivirus or 70% mancozeb WP spray, spray 7-10 days between the spray with 2-3 times.


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