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Abstract
Effects of cypermethrin on melon fruit fly, Bactrocera cucurbitae (Coq.) were studied. Third instar larvae were treated with different doses of cypermethrin i.e. 0.0016%, 0.0032%, 0.0063%, 0.0125% and 025% by contact method. LD50 against larvae of melon fruit fly after 24 hours of treatment was found to be 0.00647%. Treated insects were left for 24 hours for the evaluation of toxic effects and for the determination of lethal dose concentration. Surviving insects were kept for the observation of percent pupal formation, emergence of adults, egg laying (fecundity) and hatching (fertility). The lowest concentration of cypermethrin i.e. 0.000245% showed 1% mortality, while 0.0354% concentration of cypermethrin caused 90% mortality. As a result of a high dose 0.025% of cypermethrin against 50 larvae, only 9.66 larvae were succeeded to pupate among them only three pupae succeeded to emerge as adult. Similarly, the insects treated with the same dose i.e 0.025% showed 69.95% fecundity and 30.05% fecundity inhibition while 75.67% fertility and 24.33% fertility inhibition. Fecundity inhibition was not reciprocal to ascending concentration of cypermethrin.

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Habibullah Rana, M. Farhanullah Khan, Saleem Eijaz, M. Faheem Akbar, Jahangir Khan Achakzai, M. Sohail Khan, S. Naveed Ahmed Hashmi, Tariq Javed. (2015) EFFECTS OF CYPERMETHRIN ON FECUNDITY, FERTILITY, PUPATION, ADULT EMERGENCE AND SURVIVAL RATE OF MELON FRUIT FLY BACTROCERA CUCURBITAE (COQ.), , Volume 12, Issue 4.
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International Journal of Biology and Biotechnology
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Volume 12
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