若虫

1.Buprofezin has high activity against nymphs of the brown planthopper (BPH) and has effectively ovicidal action.

嗪酮对褐稻虱若虫有很高的生物活性，并具有杀卵作用。

2.The results indicated that both the two species of wasps could parasitize all nymphal stages of B. tabaci.

两种寄生蜂均可寄生烟粉虱的1~4龄若虫。

3.On hairy leaves, nymphs and pupae are often small with elongated dorsal setae, their margins are crenelated and sometimes indented deeply.

在有毛的叶上,若虫和蛹通常体型较小,虫体背面具有大刚毛,边缘凹陷,有时深凹。