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Effect of Date of Transplanting and Nitrogen Levels on Incidence of Major Insect-Pests of Rice

Author: N.B. Pawar, H.C. Patel, N.B. Patel and C.J. Patel

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Abstract

A field experiment was carried out to evaluate the effect of date of transplanting and nitrogen levels on incidence of major insect-pests of rice during kharif, 2017 to 2019. In order to achieve an effective and sustainable control of the rice pest, a management strategy integrating the use of resistant cultivar, appropriate planting date, and appropriate nitrogen levels must be developed. Therefore, the present study is undertaken on rice variety GR – 11 to study the influence of two main cultural practices viz., date of transplanting and nitrogen fertilizer on the insect-pest incidence and severity. The rice seedlings transplanted on 2nd and 4th week of July with application of nitrogen at 80 kg N/ ha and 100 kg N/ ha recorded minimum insect-pests incidence as compared to rice seedlings transplanted during 2nd week of August and application of nitrogenous fertilizer at 120 kg/ ha. The rice seedlings transplanted in the second and fourth weeks, as well as the plots fertilized with 100 kg N/ha and 80 kg N/ha, produced the highest grain as well straw yield.

Keywords

Rice, nitrogen level. transplanting date, hoppers, dead heart, leaf folder

Conclusion

Rice seedlings transplanted on 2nd and 4th week of July with application of nitrogen at 80 kg N/ha and 100 kg N/ha recorded minimum insect-pests incidence as compared to rice seedlings transplanted during 2nd week of August and application of nitrogenous fertilizer at 120 kg/ ha. The rice seedlings transplanted in the second and fourth weeks, as well as the plots fertilized with 100 kg N/ha and 80 kg N/ha, produced the highest yields of grain and straw. However, the interaction effect between date of transplanting and nitrogen levels on insect-pests incidence as well as yield of grain and straw were non-significant.

References

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How to cite this article

N.B. Pawar, H.C. Patel, N.B. Patel and C.J. Patel (2023). Effect of Date of Transplanting and Nitrogen Levels on Incidence of Major Insect-Pests of Rice. Biological Forum – An International Journal, 15(5a): 305-311.