棉尖象是南通棉区棉花苗期主要害虫之一。过去发生少,为害轻。六十年代中期以来,玉米大面积夏改春,棉尖象也随之暴发,给棉田全苗造成一定威胁。 一、形态特征 1.成虫 体色灰黄至灰褐,翅鞘上分布不规则褐色斑块,并散布鳞片毛,左右各有刻点纵沟10条。虫体腹面呈黄绿色金属光泽。雄体长3.8毫米,雌虫4.1毫米(不包括 Cotton spike is like Nantong cotton cotton seedling one of the major pests. Less happened in the past, less harmful. Since the mid-1960s, a large area of ​​corn has been changed to summer and cotton spikes have also erupted, posing a certain threat to the cotton seedlings. First, the morphological characteristics 1. Adult body color gray to gray brown, scattered on the wing sheath brown patches, and scattered scaly hair, left and right carved longitudinal groove 10. Abdominal surface yellowish green metallic luster. Male length 3.8 mm, females 4.1 mm (not included