花生叶斑病和缺钾的表现都是在花生叶片上出现斑点,容易混淆,要注意区别防治。花生叶斑病是黑斑病、褐斑病、网斑病等叶部斑点类病害的通称。该病主要危害叶片,也可危害叶柄、果针和茎秆。花生感病后,常引起花生落叶,严重影响光合作用,特别是茎和果针上产生病斑后,将影响水分和营养向果荚中运输,使籽仁不饱满,收获时果柄折断,将果荚遗留土中,一般减产10%~20%,严重者可达40%甚至更多。在 Peanut leaf spot and potassium deficiency are the spots on the peanut leaves, easy to confuse, pay attention to the distinction between prevention and treatment. Peanut leaf spot disease is black spot, brown spot, net blotch and other leaf spot disease known. The disease harms leaves, but also can harm petioles, needles and stalks. Peanut disease, often cause peanut deciduous, seriously affecting photosynthesis, especially stems and fruit needles on the lesion, will affect the moisture and nutrients to the pod transport, so that the kernel is not full, fruit stems at harvest broken, The pods left in the soil, the general cut 10% to 20%, in severe cases up to 40% or more. in