Influence of weather parameters on the incidence of mango leaf webber Orthaga euadrusalis Walker.
Kavitha K., Lakshmi K. V., Anitha V., Reddy D. R., Sudhakar T. R.
Author Affiliation: Department of Entomology, College of Agriculture, Rajendranagar, Hyderabad, India.
Journal of Agrometeorology 8 : 130-132
Abstract : The effects of weather parameters on the incidence of O. euadrusalis on mango (cv. Baneshan) were studied in Sangareddy, Andhra Pradesh, India, from June 2003 to May 2004. Observations on the number of leaf webs caused by O. euadrusalis were recorded every fortnight. The incidence of O. euadrusalis started on the 30th standard week (2nd fortnight of July) and peaked during the 50th standard week (1st fortnight of December), with a mean number of webs of 38.1 per tree. The pest incidence decreased, and O. euadrusalis was not observed from the 12th to the 16th standard week (2nd fortnight of March until the end of April). The pest was evident from May to June, but its population remained low. The number of webs was negatively correlated with maximum and minimum temperatures, positively correlated with the forenoon relative humidity, but not significantly associated with rainfall, evaporation and solar radiation.