Physical Bases of Resistance in Black Gram against Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)

Author: Chaitanya Gummadidala, Singh P.S., Raju S.V.S. and Divya P.

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Abstract

A laboratory experiment was conducted to study the physical bases of resistance in black gram against Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae) at the department of Entomology & Ag. Zoology, Institute of Agricultural Sciences. BHU, Varanasi. Twelve varieties of black gram seeds viz., PU-19, IPU-3-3, GBG-1, IPU-11-02, LBG787, IPU-2-43, LBG-932, IPU-10-26, PDU-1, IPU-13-1 and LBG-623 were tested for resistance to the pulse beetle C. maculatus and their performance was evaluated using physical parameters (length, width, seed coat thickness, test weight). Seed coat thickness had a positive effect on resistance, while seed length, width and test weight had a negative impact. Identifying the specific physical traits or mechanisms that confer resistance in black gram can be complex. It requires the use of techniques such as microscopy, biochemical assays, and genetic analyses to determine which physical factors (e.g., Length, width, seed coat thickness, test weight) contribute to resistance. Understanding the physical mechanisms through which black gram resists infestation by C. maculatus can guide plant breeders in developing resistant varieties. By identifying the traits and genetic factors responsible for resistance, breeders can incorporate these traits into new cultivars through breeding programs. Developing black gram varieties with inherent resistance to C. maculatus can lead to reduced reliance on chemical pesticides. This can have environmental benefits by minimizing the negative impact of pesticides on non-target organisms and ecosystems.

Keywords

Pulse beetle, Physical parameters, Seed coat thickness, Seed coat length and Test weight

Conclusion

Based on the results obtained in the experiment it is evident that in the twelve varieties of black gram tested, physical characteristics such as seed coat thickness contributed to resistance, whereas seed weight and size contributed to susceptibility.

References

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How to cite this article

Chaitanya Gummadidala, Singh P.S., Raju S.V.S. and Divya P. (2023). Physical Bases of Resistance in Black Gram against Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae). Biological Forum – An International Journal, 15(8a): 438-444.