两个水稻抗源与其育成新品种对褐飞虱生物学特性的影响

本试验对褐飞虱若虫生存率、发育进度、体重、种群建立以及成虫全氨基酸含量进行测定分析．结果表明，抗源品种上取食的褐0飞虱若虫存活率降低20%～40％；发育进度慢了1—2个龄期，体重轻13．2—17mg/10头，群体增长数量减少4倍以上。反映出抗源品种对褐飞虱的生存率、体重、发育进度及群体增长数量等生物学特性存在不良的影响，其育成品种也表观出相似的特点。成虫取食后全氨基酸测定结果表明，取食抗性品种后，虫体内氨基酸总含量偏低．与感虫品种相比相差2倍。

THE EFFECTSOFTWORICE RESISTANT SOURCES AND THEIR NEW BREEDING VARIETIES ONTHE BIOLOGICAL CHARACTER5OFBROWNPLANTHOPPER(NIL AP ARV ATA LUGNS STAL)

The effects on the biological characters of brown planthopper(Nilaparvata lugensStal)by feeding the resistant varieties of rice were determined.The results showed that thenpmph survival reduced 20-40 per cent,developing rate retarded 1-2 instars,baby weightlightened 13.2-17mg/10insects and population decreased more than 4 times.This resultsdemonstrated that the resistant varieties had antibiosis effect on brown planthopper andbrown planthopper fed on the resistant varieties liad lower amino acid content than that onthe susceptible ones.