Effect of different Sowing Dates on Occurrence of Maize Stem Borer [Chilo partellus (Swinhoe)] in Kharif Maize

Author: Gagandeep Singh, M.K. Mahla, N.L. Dangi, Kuldeep Sharma, Vijay Kumar and Sarita

Download PDF

Abstract

The present investigation was conducted on Agronomy Farm, Rajasthan College of Agriculture, MPUAT, Udaipur during Kharif 2018 with the objective of seasonal incidence of maize stem borer, effect of different sowing dates on its incidence and their correlations with the environmental factors. During the crop season in Kharif 2018, the maximum leaf injury (8.30 mean LIR) by Chilo partellus was recorded in the second week of August at 30th days after sowing. The dead heart incidence first appeared during last week of July and reached to its peak (3.00 per cent) during second week of August at 30th days after sowing. The pest showed significant negative correlation with mean relative humidity but non-significant with mean atmospheric temperature and total rainfall. During crop season, the effect of six dates of sowing was observed on the basis of seasonal mean the maximum larval population was recorded in the second date of sowing (6th August), while minimum larval was found in the last date of sowing (3rd September) in both varieties. However, in the first date of sowing C. partellus larval population showed a significant positive correlation with mean atmospheric temperature in both the varieties. In the last date of sowing C. partellus larval population showed a significant positive correlation with total rainfall in maize variety Pratap Hybrid Maize-3. While, in the first and last date of sowing C. partellus larval population showed a significant positive correlation with total rainfall in maize variety Pratap QPM. C. partellus larval population showed a significant positive correlation in different dates of sowing. The overall results indicate that the per cent infestation of maize stem borer can be minimized by sowing the crop in mid-July. It would be a cumbersome work to uproot and dissected the infested plants on every observation. This study will be helpful in the facilitating to scientific community as well as farmers regarding the occurrence of C. partellus in maize crop.

Keywords

Chilo partellus, environmental factors, incidence, Kharif maize

Conclusion

During the crop season in Kharif 2018, the maximum leaf injury (8.30 mean LIR) by Chilo partellus was recorded in the second week of August at 30th days after sowing. The dead heart incidence first appeared during last week of July and reached to its peak (3.00 per cent) during second week of August at 30th days after sowing. The pest showed significant negative correlation with mean relative humidity but non-significant with mean atmospheric temperature and total rainfall. During crop season, the effect of six dates of sowing was observed on the basis of seasonal mean the maximum larval population and found that C. partellus larval population showed a significant positive correlation in different dates of sowing. The overall results indicate that the per cent infestation of maize stem borer can be minimized by sowing the crop in mid-July during Kharif season.

References

-

How to cite this article

Gagandeep Singh, M.K. Mahla, N.L. Dangi, Kuldeep Sharma, Vijay Kumar and Sarita (2023). Effect of different Sowing Dates on Occurrence of Maize Stem Borer [Chilo partellus (Swinhoe)] in Kharif Maize. Biological Forum – An International Journal, 15(5a): 165-170.