三唑磷对不同翅型稻褐飞虱繁殖力的影响

用稻茎浸渍法测定了三唑对褐飞虱的毒力的并用其亚致死剂量（约为ＬＣ１）处理褐飞虱三龄若虫，中养至羽化后按翅型分成单对继续饲养，观察并记录其繁殖力。结果表明：三唑磷处理三龄若虫对其存活的长翅型和短翅笄城虫的产卵均有明显的刺激作用。如施用三唑磷防治水稻螟虫会促使褐飞虱在本地和迁入地猖獗发生。为此，对如何科学合理地应用三唑磷防治水稻螟虫进行了讨论。

The influence of triazophos on the productivity of the different wing-form brown planthopper Nilaparvata lugens(St()l)

Toxicity of triazophos to brown planthopper(BPH)Nilaparvata lugens(Stål)was determined by rice-stem-dipping method. The 3rd instar nymphs of BPH were treated with sub-lethal dose of t riazophos.The survivals were reared on insecticide-free rice and divided into single-pair by different wing types after emergence.Egg-masses and egg-number s of per female were checked under the stereomicroscope everyday respectively.T he results indicated that triazophos increased the productivity of macropterous and brachypterous BPH significantly.When triazophos was applied to control ri ce stem borer and paddy borer,the oviposition of BPH was promoted in the local area and the immigrate area.The relationship between triazophos applicat ion and resurgence of BPH is disscussed.