花生黑斑病(又称轮褐病)与褐斑病是花生栽培中的常见病害,在高温多湿的条件下最易发生,严重时,常使底叶落尽,甚至造成全株枯死,对生产影响很大。花生黑斑病在花生整个生育期中都可发生,自6月始发,8—9月盛发,主要侵害叶片、叶柄、托叶和茎。发病多从底叶开始逐步向上蔓延,在叶的正背面呈现圆形、直径约1—5毫米的黑褐色病斑,其周缘有时呈现黄色晕圈,每叶一股有病斑10个左右,严重时可达50多个。当病斑相互愈合后,容易引 Peanut black spot disease (also known as brown round disease) and brown spot disease is a common disease in peanut cultivation, under the conditions of high temperature and humidity is most likely to occur, in severe cases, often make the leaves out, or even cause the whole plant dead, right Production has a great impact. Peanut black spot can occur throughout the growth period of peanut, since June, 8-9 months, mainly affects leaves, petioles, stipules and stems. The incidence gradually spread upward from the bottom of the leaf, showing a round positive and back leaves, dark brown lesions of about 1-5 mm in diameter, the periphery sometimes presents a yellow halo, each leaf has a lesion about 10, Serious up to more than 50. When the spots heal each other, easy to lead