Effective range and sex ratio of insecticidal lamps for trapping the moths of Ostrinia furnacalis and Spodoptera frugiperda
In order to clarify the insecticidal effect of insecticidal lamps on Asian corn borer,Ostrinia furnacalis,and fall armyworm,Spodoptera frugiperda,the adults of the two pests artificial reared were color-marked,released at different distances from the insecticidal lamps,and recaptured by insecticidal lamps.Effective control distance was determined according to the number of recaptured adults under insecticidal lamps.At the same time,sex ratio of two pests trapped by different light sources were analyzed after long-term monitoring.The results showed that recapture rate of O.furnacalis increased with the distance from 15 to 45 m.The highest recapture rate was 4.95％at 45 m from the lamp,and significantly decreased when the distance increased to 60 m.Recapture rate of S.frugiperda at 30 m from the lamp was 6.08％,and the recapture rate of both female and male moths showed a decreasing trend with the increase of distance from the lamp,and the proportion of recaptured female moths decreased.Recapture rate of O.furnacalis at 1.2 m height was higher than that of 1.5 m and 1.8 m.Recapture rate of male moths was higher than that of female moths at all three heights,and the recapture rate decreased with increasing height,and the proportion of female moths recaptured also showed a decreasing trend.Female to male ratios of both pests trapped by both searching light and automatic pest forecast light were lower than 0.45∶1,and there was a male preference for phototropism of both pests.
insecticidal lampOstrinia furnacalisSpodoptera frugiperdatrapped distancesex ratio
万方数据
维普
