今年入伏以来,阴雨天气多,田间湿度大,各种叶斑病害发生较重。如不及时防治,可造成光合面积较少,生长不良,甚至落叶,严重的影响花生产量。因此,要根据病斑的特征,确定病害的种类,及时采取有效措施。一、病害识别1.网斑病常在花期染病,先侵染叶片,初沿主脉产生圆形至不规则形黑褐色小斑,病斑周围有褪绿晕圈,后在叶片正面出现边缘呈网纹状的不规则形褐色斑,病部可见粟褐色小点。阴雨连绵时叶面病斑较大,近圆形,黑褐色,叶背病斑不明显。干燥条件下病斑 Since entering this year, more rainy days, field humidity, a variety of leaf spot disease occurred heavier. If not timely control, can cause less photosynthetic area, poor growth, and even leaves, a serious impact on peanut production. Therefore, according to the characteristics of the lesion to determine the type of disease, take timely and effective measures. First, the disease identification 1. Web blot disease often inflorescence disease, the first to invade the leaves, the first along the main vein to generate irregular round shape to dark brown spots, spots around the faded green halo, the edge of the leaves appeared in the front Irregular shaped brown reticulate-like spots, disease visible milky brown spots. When the rainy foliage lesions larger, nearly round, dark brown, leaf back lesions are not obvious. Dry conditions lesions