褐稻虱长、短翅型产卵特性的比较

THE OVIPOSITIONAL CHARACTERS OF TWO WING-FORMS OF THE BROWN PLANTHOPPER, Nilaparvata lugens (St(a|°)l) ( Homoptera,Delphacidae )

本研究在水稻不同生育期、不同抗性品种及不同温度条件下,对褐稻虱长、短翅型雌虫的产卵量和产卵前期进行了比较。试验结果表明,在16～33℃恒温和17.4～27℃自然变温范围内,长、短翅型雌虫在同一温度条件下产卵量差异不显著。在水稻的苗期、分蘖期和孕穗期,取食同一生育期植株的两种翅型雌虫产卵量也无显著差异。同在感虫品种或中抗品种上,不同规型雌虫的卵量也未表现显著的差异,只有在抗虫品种7105上,短翅型雌虫的卵量明显高于长翅型雌虫。此外,在22～31℃范围内,处在同一温度下短翅型雌虫的产卵前期显著短于长翅型雌虫。

The amount of eggs laid by the brachypterous (B-form) and macropterous (M-form) females of the brown planthopper and their preovipositional period were studied under different nvironmental conditions.The results showed that there was no significant difference In the number of eggs between the two wing-forms of females under constant temperature within the ranges of 16℃ to 33℃ and ambient temperature varying from 17.4℃ to 27℃ Also,the two wing-forms of females feeding on rice plants in the seedling,tillering and booting stages produced the same level of egg number.Although more eggs laid by B-form on the resistant variety 7105 were observed,there was no significant difference in the number of eggs laid by the two wing-forms on the moderately resistant and susceptible varieties.On the other hand,the preovipositional period of the B-form was distinctly shorter than that of the M-form under temperature ranging from 22℃ to 31℃