回放雄虫第二种鸣声对稻褐飞虱生殖过程的抑制作用

INHIBITION OF THE SECOND MALE VIBRATIONAL SIGNAL ON REPRODUCTION OF THE BROWN PLANTHOPPER, NILAPARVATA LUGENS (Stl)

结果表明：１回放稻褐飞虱雄虫第二种鸣声（ＳＭＶＳ）１～１２ｈ可以显著降低雌雄虫的成功交配率，而回放ＳＭＶＳ２４ｈ则对此无明显影响；２回放ＳＭＶＳ对交配率的影响主要在于对试虫相遇前的求偶过程，表现为雌虫鸣叫率显著下降，对雄虫求偶声（ＦＭＶＳ）的反应延迟；雄虫对雌虫求偶声（ＦＶＳ）的反应程度有所降低；雌雄虫的相遇前期显著延长；３回放ＳＭＶＳ不影响交配试虫的授精率和产卵量，但影响授精的质量，表现在精包明显变小，卵的发育率下降。

Laboratory experiments employing playback of the recorded Second Male Vibrational Signal (SMVS) were designed here to clarify its underlying inhibition on the reproduction of Nilaparvata lugens, and the following results were obtained (1) A substantial decrease of mating rate was observed at 1～12 h playback, but not at 24 h playback of SMVS (2) In the stated reproduction inhibition, the normal active response to courtship signal from opposite sex was depressed greatly in female and slightly in male N lugens tested Additionally, much less frequent signal production was detected on the treated female, which inevitably became an obstacle to their meeting (3) Though causing no obvious decrease of insemination rate in copulated N lugens and the amount of oviposition, playback of SMVS surely gave rise to worse insemination quality, as indicated by smaller spermatophores and less well developed eggs