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Impact of Mating Frequency on Fecundity, Fertility and Longevity of Red Palm Weevil, Rhynchophorus ferrugineus （Olivier）（Coleoptera： Curuclionidae）

引用

Journal of Agricultural Science and Technology(A) 2012年第4期2卷 520-528页

作者： mahmoud mohamed abdel-azim polana sri panduranga vithal vidyasagar saleh abdullah aldosari rashid mumtaz Chair of Date Palm Research College of Food and Agriculture Sciences King Saud University Riyadh 11451 Saudi Arabia

The reproductive behavior of red palm weevil, Rhynchophorusferrugineus Olivier was studied in laboratory with several sets of unmated females paired with unmated males for different periods. The treatments in these controlled mating experiments included single mating, multiple mating for 24 h, multiple mating weekly, multiple mating on alternate days and multiple mating uninterrupted with a control group. During the study, observations were made on the number of eggs laid, incubation period, hatching percentage, ovipositional periods and adult longevity. Though unmated females laid a large number of eggs, these were infertile. This study clearly showed significant differences in the egg-laying capacity of females exposed to different frequencies of mating. The average number of eggs laid varied from 98.9 ± 9.7 eggs in a single-time mated female to 195.8± 24.3 eggs in females allowed to mate on alternate days throughout their life. As far as the percentage of egg-hatching is concerned, there were significant differences in single and multiple mated females with 22.4 ± 3.3% hatching in one time mated females as compared to 85.2 ± 1.9% in alternate day mated females. This study also showed direct impact of female matings on the number of eggs laid and their hatching percentage. Moreover, the unmated and mated female groups showed no significant differences in oviposition and post-ovipositional period and also there was very little difference in male and female adult longevity.

关键词： Mating frequency fecundity hatchability adult longevity red palm weevil Rhynchophorusferrugineus

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