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玉米穗虫是指玉米穗期,为害玉米雌穗的多种害虫的总称,有棉铃虫、玉米螟、桃蛀螟、高粱条螟、黏虫、秋毛虫等。尤其是棉铃虫,近几年在玉米上为害加重,已成为影响玉米产量和品质的一种重要害虫。一、发生为害特点棉铃虫又称钻心虫、棉桃虫、辣椒虫,属鳞翅目,夜蛾科。棉铃虫发生的代数因年份和地区而异。在山东省每年发生4代,翌春气温回升至15℃以上时开始羽化,4月中下旬至5月上旬为羽
Corn earworm is the ear of corn, ear corn ear damage of a variety of pests, bollworm, corn borer, peach borer, sorghic stem borer, armyworm, autumn caterpillar and so on. In particular, the bollworm has become more and more harmful to maize in recent years and it has become an important pest affecting the yield and quality of maize. First, the occurrence of damage characteristics Helicoverpa armigera, also known as bore worms, cotton peach, pepper worms, is a Lepidoptera, noctua family. The occurrence of cotton bollworm algebra varies by year and region. Occurred in Shandong Province, 4 generations a year, the next spring temperatures began to rise above 15 ℃ feather, mid to late April to early May for Yu