不同生物型褐飞虱的取食和产卵行为

THE DIFFERENT FEEDING AND OVIPOSITION BEHAVIOR AMONG BROWN PLANTHOPPER BIOTYPES

比较了不同生物型褐飞虱在感虫品种TN1和抗虫品种IR26和ASD7上的取食和产卵选择性及其取食刺探行为。结果表明,生物型2若虫嗜食IR26,生物型3若虫对3个品种的选择性无显著差异。生物型3成虫嗜食TN1,而生物型1和2成虫在3个品种上的取食选择性无显著差异。生物型2在3个品种上的取食刺探频率差异不显著。生物型1和3成虫喜欢在TN1上产卵,而生物型2则喜欢在其适应的水稻品种IR26上产卵。在强迫取食条件下,生物型1在TN1上的刺探频率显著减少而生物型3在ASD7上的刺探频率显著增加。结果说明生物型2的取食和产卵行为与其致害性基本一致,而生物型3则与其致害性不吻合。

The feeding and oviposition selectivity and probing behavior of different bio-types of brown planthopper, Nilaparvata lugen Stal on TNI (susceptible variety) and IR26 and ASD7(two resistant varieties) were compared. The results showed that the nymph of biotype 2 preferred to IR26 , and there were no significant differences among the selectivities of the nymphs of biotype 3 on the three varieties. The adults of biotype 3 preferred to TNI, while there were no significant differences among the selectivities of adult biotypes 1 and 2 on the three varieties. No obvious differences among the probing frequencies of biotype 2 on the three varieties were recorded. The adults of biotype 1 and 3 preferred to ovipositing on TNI, but those of biotype 2 preferred to ovipositing on IR26, they adapted to. Under compulsory feeding condition, the probing frequency of biotype 1 on TNI decreased significantly, and that of biotype 3 on ASD7 increased significantly. It was indicated that the feeding and ovipositing behaviors of biotype 2 conformed basically to its virulence, whilst in biotype 3 were inconsistent.