Seasonal Activity and Population Dynamics of Mythimna separata, Tetrix subulata, Euscyrtus concinnus and Gryllotalpa orientalis in Rice in Relation to Meteorological Parameters

Author: Sanju Singh, Amit Kumar Sharma, Naresh Dhakar, Mitesh Makwana and Dheerendra Mahor

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Abstract

Experiment is based on the seasonal incidence of insect’s pests of rice collected through light trap device, provides useful information on monitoring of pest’s activity in the field condition and fluctuation of pest population. Activity during June to October, Mythimna separata first appeared during 40th SW and attain its first peak in this week (7.28 moths) population was decreased from 31st to 36th SW, with a slightly increased and decreased from 37th to 40th SW, correlation studies of Mythimna separata revealed that evening relative humidity, minimum temperature, wind velocity, evening vapor pressure, morning vapor pressure and number of rain days showed significant negative correlation. Tetrix subulata was first observed in light trap during 27th SW (0.71 hoppers) population than increased sharply from 41th standard week light trap. Crucial activity period was July to October; correlation studies of Tetrix subulata revealed that evening relative humidity, evening vapor pressure showed significant negative correlation. Euscyrtus concinnus is a minor pest of paddy in Jabalpur. It was first observed during 27th SW (32.85 crickets) in light trap, population than sharply increased to attain its first and highest peak during 28th SW (213.14 crickets). Gryllotalpa orientalis was first observed in light trap device during 26th SW. Its second and highest peak 43rd SW (8.71 cricket). The correlation studies revealed these four pest in relation to different meteorological parameters.

Keywords

Seasonal activity, Light trap, insects, Phototactic, Rice, population and Weather parameters

Conclusion

Seasonal incidence of harmful insect’s pest of rice was done by operative the light trap device in kharif season of 2016. Recorded crucial activity period of Mythimna separata was first appeared during 4th standard week and attain its peak in this week (7.28 moths) in light trap. Population then sharply decrease from 43rd SW to 44th SW, major activity period was October. Short horn grass hopper was first observed in light trap during 27th SW (0.71 hoppers). Major activity period was July to October. Euscyyrtus concinnus is a minor pest of rice crop in Jabalpur and other region also, it was first observed during 27th SW, major activity period was June to October. Gryllotalpa orientalis was first observed in light trap tool in the 26th SW (0.85 crickets). Population than sharply declined in 44th SW. Major activity period was June to October. The correlation studies revealed that four major pests in relation to different meteorological parameters such as, maximum temperature, minimum temperature, sunshine, evening and morning relative humidity, wind velocity, morning vapor pressure, evening vapor pressure, rainfall and number of rainy days.

References

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How to cite this article

Sanju Singh, Amit Kumar Sharma, Naresh Dhakar, Mitesh Makwana and Dheerendra Mahor (2023). Seasonal Activity and Population Dynamics of Mythimna separata, Tetrix subulata, Euscyrtus concinnus and Gryllotalpa orientalis in Rice in Relation to Meteorological Parameters. Biological Forum – An International Journal, 15(10): 566-570.