花生叶斑病是花生生产上危害最重的普发性病害。花生叶斑病有10余种,目前危害最烈的有黑斑、褐斑、焦斑和网斑四种。上述几种斑病多是混合发生,有些地区则以一种或两种危害为甚。花生受病后,使叶、茎早枯,大批落叶,严重影响荚果的饱满度,轻者减产15%左右,重者达40%以上。一、病症的识别 1.褐斑病开花前即可发生,发病初期在叶片上 Peanut leaf spot is the most devastating pandemic disease in peanut production. Peanut leaf spot disease has more than 10 species, the most dangerous at the moment there are spots, brown spots, focal spots and net spot four. The above-mentioned spots are mostly mixed occurrence, but some areas are one or two hazards even worse. Peanut disease, so that leaves, stems early withered, a large number of deciduous, seriously affecting the pod fullness, light output reduction of about 15%, severe cases of more than 40%. First, the identification of disease 1. Brown spot can occur before flowering, early onset on the leaves