稻粉虱原为水稻次要害虫,1993年在我县大发生,从8月初始,单、双晚稻上陆续发现,全县发生14万亩,其中单季稻叶片出现枯死和霉污病面积达1500亩,双晚田虫量多的每丛卵及若虫达956头,一张叶片可见若虫73—85头,有的上百头,严重发生面积达23000亩。 稻粉虱以若、成虫在水稻叶背吸食汁液,受害叶片褪绿变黄,其分泌物可引起叶正面霉污病,影响光合作用,严重的整株枯死。 稻粉虱成虫停栖时翅呈屋脊状,喜在植物幼嫩的叶背面活动产卵,受惊即飞走,卵为堆产或散产,每堆3—8粒,常部分叠置,卵面覆有白 Rice whitefly was originally a major pest of rice and occurred in our county in 1993. From the beginning of August, single and double late rice successively discovered that 140,000 mu were occurred in the county, of which the single crop had withered and mildewed area of ​​1500 Mu, the amount of double-night fieldworm eggs and nymphs per bundle of up to 956, a leaf visible nymphs 73-85, and some hundreds, a serious occurrence of an area of ​​23000 acres. If the whitefly, if the adults in the rice leaf back to drink juice, the victim leaves chlorotic yellow, the secretions can cause leaf positive mildew, affecting photosynthesis, severe whole plant dead. Rice whitefly adults at the habitat wing was ridge-like, hi the young plants in the back of leaf activity spawning, frightened that fly away, the eggs for the heap or casual, 3-8 per pile, often partially superimposed, eggs Face covered with white