Monitoring and forewarning of Helicoverpa armigera, leucinodes orbonalis, scirpophaga incertulas and Spodoptera litura in western U.P.

A study was made on monitoring and forewarning of Helicoverpa armigera, Leucinodes orbonalis, Scirpophaga incertulas and Spodoptera litura at CRC and HRC, S.V.P. Uni. of Agric. & Tech., Meerut. The maximum population of H. armigera (85 moth/trap/week) was recorded in 19^th SW (2^nd week of May 2006), L. orboinalis (19.33 moth/trap/week) in 45^th SW (1^st week of November 2005) and next successive higher population 16.0 moth/trap/week (3^rd week of May 2006) was recorded in present experimental observation and no moth catches was recorded in severe cold months. S. Incertulas (8.0 moth/trap/week) In 36^th SW (2^nd week of September 2006) and the population of this pest was active from 32^nd SW to 47^th SW. 5. litura (765.33 moth/trap/week) was recorded in 19^th SW (2^nd week of May 2006), this Insect pest was observed throughout the year. In present investigation it's also observed that the weather factors play an important role in the population build up of the different insect pests. Moth catches of H. armigera population showed significant positive correlation with maximum temperature, while significantly negative correlation with RH. The moth catches of L. orbonalis revealed ignificant positive association with maximum and minimum temperature. In case of S. incertulas, moth catches showed non-significant correlation with weather factors. The population of S. litura revealed a significantly positive correlation with maximum temperature but RH showed significant negative correlation.