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Journal of Entomology and Zoology Studies
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ISSN Print: 2349-6800 | ISSN Online: 2320-7078

Journal of Entomology and Zoology Studies

2017, Vol. 5, Issue 4
Effect of host’s Helicoverpa armigera (Hubner) larval age on the numerical response of the parasitoid Campoletis chlorideae Uchida

Maheshwar Singh, Bhuwan Bhaskar Mishra and CPM Tripathi

The numerical aspects of interaction between Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae) and different larval stage of the host Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) at different parasitoid density were studied in entomological laboratory, department of Zoology, D. D. U. Gorakhpur University, Gorakhpur, U. P. in summer season of 1999-2000. The host larval age and density of the female parasitoid affect the rate of parasitization. The number of emerging offspring was higher with the second instars larvae larvae (y =23.9 + 16.279 log x; r = 0.951; P<0.001), followed by III instar larvae (y = 21.7 + 17.27 log x; r = 0.966; P<0.001), I instar larvae (y = 20.9 + 16.279 log x; r = 0.951; P<0.001) and then IV instar larvae (y = 12.7 + 8.970 log x; r = 0.996; P<0.001) of the host H. armigera. With the increase of the parasitoid density, the number of emerging offspring increased nonlinearly with a (F = 48.532; P<0.001) significant correlation. The number of progeny inter-specific competition amongst parasitoid on the 50 hosts in all the larval stages. The higher number of parasitoids have lower rate of multiplication, supports the existence of mutual interference.
Pages : 233-237 | 665 Views | 39 Downloads
How to cite this article:
Maheshwar Singh, Bhuwan Bhaskar Mishra, CPM Tripathi. Effect of host’s Helicoverpa armigera (Hubner) larval age on the numerical response of the parasitoid Campoletis chlorideae Uchida. J Entomol Zool Stud 2017;5(4):233-237.
Journal of Entomology and Zoology Studies
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