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Seasonal Parasitization of Larval Parasitoid Cotesia flavipes against Sugarcane Stalk Borer

Author: Abinaya S., Anil Kumar, Nagendra Kumar, Ponnusamy N. and Srikanth N.

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Abstract

Borers are the major pests of Sugarcane ecosystem which is parasitized by the gregarious parasitoid Cotesia flavipes. But the efficiency of Cotesia flavipes and the peak parasitization period were not clearly known. So, the present investigations were carried out on Seasonal parasitization of larval parasitoid Cotesia flavipes against sugarcane stalk borer at Sugarcane Research Institute, Dr. Rajendra Prasad Central Agricultural University during 2020-2021. To observe the natural parasitization against borer in the sugarcane ecosystem BO 154 variety was planted in 0.5-acre field. The work was mainly focused on gregarious parasitoid Cotesia flavipes on stalk borer. Cotesia flavipes parasitization on stalk borer started from the second fortnight of June and attained peak parasitization during the second fortnight of September and continued till December first fortnight. Maximum parasitization of 30.6 per cent was observed in the second fortnight of September. Cotesia flavipes parasitization significantly correlated with minimum temperature and 14.00 hrs relative humidity.

Keywords

Seasonal parasitization, Sugarcane borer complex, Cotesia flavipes, weather parameters

Conclusion

Larval parasitoid Cotesia flavipes reduced 20 per cent of stalk borer infestation in natural field condition. And the peak parasitization of Cotesia flavipes coincided with peak activity of Stalk borer which is the great advantage for better management of pest. In addition to natural population, if release Cotesia flavipes, we can control the stalk borer effectively. At the same time, we can significantly reduce the insecticide usage and plant protection cost.

References

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How to cite this article

Abinaya S., Anil Kumar, Nagendra Kumar, Ponnusamy N. and Srikanth N. (2023). Seasonal Parasitization of Larval Parasitoid Cotesia flavipes against Sugarcane Stalk Borer. Biological Forum – An International Journal, 15(9): 202-206.