KAIROMONAL EFFECT OF SOME PLANT EXTRACTS AND MOTH SCALES FOR IMPROVING THE PERFORMANCE OF TRICHOGRAMMA CHILONIS (ISHII)
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Date
2019-06-28
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Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
The study entitled “Kairomonal effect of some plant extracts and moth scales for improving the performance of Trichogramma chilonis (Ishii)” was undertaken at Biocontrol laboratory, Department of Entomology, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during 2018-19. The experiment was laid out in Completely Randomized Design (CRD) with six treatments and five replications.
Studies were undertaken to evaluate the hexane extracts of male and female moth scales of host insects and hexane extract of various host plants for improving the performance of Trichogramma chilonis (Ishii) under laboratory and potted plants conditions. Male and female extracts of E. vittella and Corcyra was taken and leaves extracts of four plants namely cotton, brinjal, tomato and okra were taken along with a standard octacosane for studying their effect in improving parasitization by T. chilonis.
The results revealed that treating irradiated eggs of Corcyra chephalonica with hexane extract of moth scales of female E.vittelia and female C.cephalonica at 10000 ppm has recorded maximum parasitism of 81.99% and 75.99% by T. chilonis, respectively whereas in control (Hexane), 40.66% parasitism was recorded. Maximum emergence of 71.03% was observed with C. cephalonica female moth scale extract followed by Earias female extract (70.08%). Similarly, the other biological parameters like fecundity and female longevity were also found to be influenced significantly by the moth scale extracts. Among the host plants tested, the hexane extract of cotton leaves has recorded 80.66% parasitism followed by hexane extract of tomato leaves (74.66%). Also maximum adult emergence (75.92%) was observed on hexane extract of tomato leaves followed by cotton leaves (72.67%). Maximum fecundity was obtained when egg cards were treated with hexane extract of cotton leaves with 70.4 eggs/female compared to control (Hexane) recording 42.2 eggs/female. Highest female longevity (9.2 days) and male-female ratio (1:0.96) were also recorded on hexane extract of cotton leaves. The present study also indicated that kairomonal compounds from hexane extract of host plants and host insects plays important role in increasing parasitization by T. chilonis on both cotton and pigeonpea plants under greenhouse conditions.
Description
The present investigation concluded that the moth scale extracts of host insects as well as plant leaves extract significantly influence the performance of T. chilonis. Female moth scale extract of C. cephalonica and E. vittella as well as host plants can be used for improving parasitization by T. chilonis.
Keywords
Plant protection, Control methods, Biological Control, Biological control agent, Natural Enemie, Parasites, Solutions, Trichogramma chilonis, Pest, Earias vittella, Helicoverpa armigera Spodoptera litura, Corcyra cephalonica, Statistics and experimentation, Experimentation, Laboratory Experimentation, Pot experimentation, Statistical methods, Design, Data analysis, Experimental design.
Citation
DEVENDRA KUMAR. (2019). Kairomonal Effect of Some Plant Extracts and Moth Scales for improving the Performance of Trichogramma chilonis (Ishii). Department of Agricultural Entomology, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2019. Print. xiv, 85p. (Unpublished).