author(s)
Amit Kumar Sharma, Rajesh Pachori, AK Bhowmick and AS Thakur

abstract
Field experiment was conducted at research farm JNKVV, Jabalpur during 2014 and 2015. Standard design of Jawahar light trap (Model SM-96) was used to collect advantageous information on seasonal activity of two major Noctuid insect pest species viz. Gram pod borer, Helicoverpa armigera (Hub.) and Tobacco caterpillar Spodoptera litura (Fabricius). Seasonal activity indicated that major activity period of these insect pest was confined between August to April in case of Helicoverpa armigera. While major activity period of Spodoptera litura was September to December in kharif, February in Rabi and March- April in summer. Activities of both the pests were very low during May and June. Three pinnacle point were recorded in trap catch of Helicoverpa armigera which indicates completion of 3 generations during cropping period.