VIJAY KUMAR*, M. K. MAHLA, ANILVYAS AND JHUMAR LAL

A field experiment was conducted to study the seasonal incidence of tomato fruit borer, Helicoverpa armigera (Hub.) on tomato with and without marigold as a trap crop. The tomato fruit borer, H. armigera larvae were found to infest tomato crop throughout the growing season. The incidence of fruit borer on tomato without marigold as a trap crop was first noticed in the first week of February. The pest touched the peak with a mean of 4.40 larvae / five plants during third week of March. Similarly, the incidence of fruit borer on tomato with marigold as a trap crop was first noticed in the fourth week of January. The pest touched the peak with a mean of 1.20 larvae / five plants during third week of March. The correlation between fruit borer population and mean atmospheric temperature was positive and significant in with and without marigold; while, it exhibited non-significant negative correlation with relative humidity.