Peanut in Changchun is ill, and there are always black spots on the leaves ... What do you think ... I don't know what medicine to buy ... Do you need to buy some medicine and sprinkle some salt yourself? This is black spot disease. It is composed of Pseudomonas, Starfish, Stemona, Stemona, Diphymenomycetes, Coccus, Pygmy and Schizomycetes. Infection occurs in wet season, with round or irregular black leaves, sometimes on petioles, stems and flowers.

Prevention and control methods: strengthen cultivation management, pay attention to shaping and pruning, ventilation and light transmission. When the new leaves are unfolded, spray 4% flusilazole or 20% flusilazole prochloraz 800- 1000 times, or 75% chlorothalonil 500 times, or 80% zineb 500 times, 1 times, continuously for 7- 10 days and continuously for 3-0 days.