论文部分内容阅读
甘蔗绵蚜是甘蔗上主要害虫之一。其为害特点是以成虫和若虫刺吸蔗叶内的汁液,使受害叶片变黄枯萎;另外蚜的分泌物(蜜露)极易引起甘蔗烟煤病,直接影响光合作用及甘蔗的正常生长。一、发生状况甘蔗绵蚜虫态有无翅成虫、有翅成虫、无翅若虫和有翅若虫四种。在我省每年可发生20代,行孤雌生殖,且世代相重叠,成虫和若虫均群集于蔗叶背面中脉两旁为害。在大田发生规律可分为三个时期:
Sugarcane Aphis is one of the major pests on sugarcane. Its damage is characterized by adults and nymphs sucking the juice inside the sugarcane leaves, the victim leaves turn yellow wilt; other aphid secretions (honeydew) can easily lead to bituminous coal disease, a direct impact on photosynthesis and the normal growth of sugarcane. First, the occurrence of sugar cane Aphid state there wingless adults, winged adults, wingless nymphs and winged nymphs four. In our province 20 generations occur each year, parthenogenesis, and generations overlap, adult and nymphs are clustered in the back of the cane on both sides of the midrib harms. In the field of law can be divided into three periods: