Indexing

A Study of Biological Attributes and Morphometry of Trichogramma japonicum Ashmead

Author: Bikash Mohapatra and C.U. Shinde

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Abstract

Trichogramma species constitute one of the most commonly used bio agent of natural enemies for biological control programs worldwide. Trichogramma sp. are very difficult to identify because of their tiny size and uniform morphological characters. The present investigation aims to study several aspects of the biological attributes and morphological character of T. japonicum. The present study pointed out that the total developmental period of T. japonicum on C. cephalonica was 8.56 ± 0.22 days. Adult emergence was 96.67 ± 3.32 percent with a sex ratio of 1: 2.82 (Male: female). The female parasitic wasp lived longer (4.90 ± 1.12 days) as compared to the male (2.63 ± 1.10 days). Moreover, the total life cycle of female T. japonicum was 13.46 ± 1.21 days while the male has 11.19 ± 1.11 days. In addition, Dimorphism existed in T. japonicum. The overall body size as well as the wing span of the female was larger as compared to the male wasp while the antenna of the male (0.21 ± 0.01 mm) was noted far longer than that of the female parasitoid (0.13 ± 0.01 mm). The female had a long distinctive ovipositor of 0.22 ± 0.02 mm in length.

Keywords

Trichogramma, Corcyra, emergence, biological attributes, morphometry

Conclusion

From the above experiment, it can be concluded that the parasitoid had a few good attributes viz., short developmental period, high adult emergence, comparatively longer adult longevity as well a high percentage of female progeny which ensures its suitability for integration in integrated pest management programme. Furthermore, the morphological description, as well as morphometrical measurements of various body parts presented herewith, would be helpful in the identification of T. japonicum from other species of Trichogramma and also to differentiate the opposite sex of T. japonicum.

References

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How to cite this article

Bikash Mohapatra and C.U. Shinde (2023). A Study of Biological Attributes and Morphometry of Trichogramma japonicum Ashmead. Biological Forum – An International Journal, 15(5): 498-506.