Population Dynamics of Spotted Pod Borer, Maruca vitrata (Fabricius) in Greengram

Author: K.J. Bhuva and S.D. Patel

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Abstract

An experiment on the population dynamics of spotted pod borer, Maruca vitrata (Fabricius) (Lepidoptera: Crambidae) in greengram was conducted at Anand Agricultural University, Anand, Gujarat during kharif 2021. The incidence of spotted pod borer commenced in the third week of August [34thStandard Meteorological Week (SMW)] and it continued up to the harvest of the crop in the 42nd SMW. The spotted pod borer population fluctuated between 0.48 to 2.45 larva(e)/plant with a peak population during the third week of September (38th SMW). A higher incidence of spotted pod borer was observed during the 37th to 42ndSMW. The larval population of M. vitrata exhibited a significant positive correlation with bright sunshine hours (r = 0.7336) and significant negative correlation with the wind speed (r = – 0.7006).

Keywords

Population dynamics, Maruca vitrata, Greengram, Spotted pod borer

Conclusion

From the present study, it can be concluded that the infestation of M. vitrata in the kharif greengram crop commenced during the 5th week after sowing (34th SMW) and it persisted up to the harvest of crop in the third week of October (42nd SMW). A higher incidence of spotted pod borer (>2.00 larvae/plant) was observed during the 37th to 42nd SMW (8th to 13th WAS), whereas the peak larval density was observed during the 9th week after sowing (38th SMW). Correlation studies indicated that the larval population of spotted pod borer exhibited a significant negative correlation (r = -0.7006) with wind speed and a significant positive correlation(r = 0.733) with bright sunshine hours.

References

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How to cite this article

K.J. Bhuva and S.D. Patel (2022). Population Dynamics of Spotted Pod Borer, Maruca vitrata (Fabricius) in Greengram. Biological Forum – An International Journal, 14(4): 472-474.