Peanut net spot, also known as brown spot disease, cloud spot disease, often occurs in combination with leaf spot disease. It can cause early peanut leaf shedding, which seriously affects peanut yield.
First, the incidence of diseases in the flowering period began to occur, the peak period of onset in the scab to maturity, mainly damage the leaves, the main pulse along the early round or irregular dark brown spots, around the lesion with a green halo After that, the edges of the leaves appeared irregular brown spots with a reticular pattern on the front, and small brown spots were visible in the diseased part. When the rain is continuous, the lesions on the leaf surface are large, dark brown, and the lesions on the back of the leaves are not obvious, light brown, and the lesions are severely fused; in the dry conditions, the lesions are easily broken and perforated. Once the leaves are infected, they can easily fall off.
Second, control methods in the early onset, with 70% mancozeb WP 500 to 600 times, 75% chlorothalonil WP 700 to 800 times, 64% WP 50 times, 70 % B Phosphate Manganese Zinc Wettable powder 500 times or 80% Spray grams wettable powder 600 times, spray once every 10 to 15 days, and spray 2~3 times.
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