Biophysical Traits as Resistance Sources in Bitter Gourd Genotypes Against Melon Fruit fly (Bactrocera cucurbitae Coquillett)

Author: Chandan K.C., B. Doddabasappa, Gangadhar Narabenchi, H. Amarananjundeswara, S.K. Mushrif, R. Manjunatha and K.R.M. Bhanu

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Abstract

Melon fruit fly (Bactrocera cucurbitae Coquillett) is one of the most important pests of cucurbits and bitter gourd (Momordica charantia Lin.) is highly prone to damage by this pest worldwide. Twenty-eight bitter gourd genotypes/hybrids were screened against fruit fly under field conditions at College of Horticulture, Kolar, Karnataka, India. The fruit damage was ranged from 18.10% to 83.38%. Maggot density per fruit ranged from 3.50 to 10.50 larvae/fruit. The maggot density increased with the increase in per cent fruit damage and showed significant positive correlation (r=0.89). Among the different genotypes/hybrids screened, Palee-1 and Leena were classified under resistant category, whereas the 22 genotypes/hybrids were categorized as moderately resistant. The Preeti and BG-13 were categorized into susceptible group and IC-541218-1 and Arka Harita were grouped into highly susceptible genotypes/hybrids. Fruit length, fruit diameter and exhibited positive correlation. Whereas, the num

Keywords

Bitter gourd, fruit infestation, melon fruit fly, biophysical traits.

Conclusion

It can be concluded from the present investigation that, Palee-1 and Leena was registered as resistant genotypes. The IC-541218-1 and Akra Harita were reported highly susceptible genotypes. The biophysical traits such as fruit toughness and rind thickness was noticed significantly highest in the resistant genotypes (Palee-1 and Leena) compared to the highly susceptible genotypes (IC-541218-1 and Akra Harita). These biophysical traits which impart resistance against fruit fly infestation. These marker traits can be well utilized in the development of bitter gourd varieties of conferring melon fruit fly resistance in the near future

References

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How to cite this article

Chandan K.C., Doddabasappa, B., Gangadhar Narabenchi, Amarananjundeswara, H., Mushrif, S.K., Manjunatha, R. and Bhanu, K.R.M. (2021). Biophysical Traits as Resistance Sources in Bitter Gourd Genotypes Against Melon Fruit Fly (Bactrocera cucurbitae Coquil