Saurabh Jaiswal, P.K. Bhagat, Shani Raj*, G.P. Painkra and K.L. Painkra
Department of Entomology, Raj Mohini Devi College of Agriculture and Research Station, Ambikapur -497001 (C.G.) India
BTC, College of Agriculture and Research Station, Billaspur (C.G.) India
Email:saurabhjais.101@gmail.com
Received-02.07.2020, Revised-24.07.2020
Abstract: The field experiment was conducted at Raj Mohini Devi College of Agriculture and Research Station, Ambikapur (C.G.) during kharif 2019, to know the seasonal incidence of corn earworm, Helicoverpa armigera infesting maize. Corn earworm appeared during 31stSMW i.e. 28th July-5th August (2nd week). The peak population of corn earworm was observed in the first week of September with a mean population of 1.10 larvae/plant. The correlation between corn earworm, Helicoverpa armigera and weather parameters during kharif 2019 results indicated that the population demonstrated a significant positive correlation with maximum temperature (r =0.577). The regression equation being y= 2.805x+26.97 indicating that within increase in 10C maximum temperature there will be increase in population by 2.805.
Keywords: Correlation, Helicoverpa armigera, incidence, maize
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