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1 results

  • Bionomics of an aphidiid parasitoid, Trioxys indicus Subba Rao and Sharma. 35. Influence of food plants on the life table statistics of the parasitoid through its host Aphis gossypii Glover

  • Neelima Bhatt, Rajendra Singh
  • Journal:
    Insect Science and Its Application / Volume 12 / Issue 4 / August 1991
    Published online by Cambridge University Press:
    19 September 2011, pp. 385-389
    Print publication:
    August 1991

  • In the present work, influence of food plants on different life table parameters of the parasitoid Trioxys indicus Subba Rao and Sharma was studied as affected through its host Aphis gossypii Glover. Age-specific survival of T. indicus on aphids bred on Lagenaria vulgaris was greater (7 days) than on Luff a cylindrica and Cucurbita maxima (4 days). The net fecundity rate, total reproductive period, intrinsic rate of natural increase, intrinsic rate of total fecundity and weekly multiplication rate of T. indicus fed on L. vulgaris was higher than on other cucurbit food plants. Doubling time of the parasitoid fed on L. vulgaris was lower than on other food plants, whereas the mean generation time of the parasitoid on L. vulgaris was slightly higher than on L. cylindrica but lower than on Cajanus cajan and C. maxima. All these measurements (considered indices of fitness of the entomophages) indicated that population growth pattern of T. indicus fed on L. vulgaris is faster than those fed on other food plants.