Annals of Plant Protection Sciences
Year : 2002, Volume : 10, Issue : 1
First page : ( 17) Last page : ( 22)
Print ISSN : 0971-3573.

Light Trap Catch of Rice Insect Pest, Nephotettix virescens (Distant) and its Relation with Climatic Factors

Rai A.K., Khan M.A.*

Department of Entomology, R.A.U., Pusa, Samastipur 848 125, India.

*Department of Entomology, G.B.P.U.A.&T., Pantnagar, 263 145, U.S. Nagar, India.

Abstract

A 26 years light trap catch study of the green leafhopper, Nephotettix virescens revealed that there was one peak catches during first fortnight of August in the kharif (main) season of rice crop. The fortnightly mean morning relatively humidity for 15 days (nymphet period) prior to light trap catch had positive effect. The other factors like sunshine hours and rainfall had positive and negative influence respectively on the population catches. Multiple regression equation fitted also showed the 22% association with morning relative humidity. A mathematical model for forecasting relating to mean morning relative humidity with GLH catches in rice season had been developed based on 26 years light trap study. Pest appearance depends upon the availability of choice food, but the peak number depends upon the availability of choice food with the climatic factors.

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Key words

Green leafhopper, Light trap, Nephotettix virescens, Climatic factors.

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