Effects Of Environmental Factors On The Population Dynamics Of Chilli Fruit Borer And Its Management With Newer Insecticide Combinations And Sole Insecticides

An experiment was conducted to study the population dynamics of Chilli fruit borer and to evaluate the efficacy of newer insecticide combinations and sole insecticides along with untreated control. The chilli fruit borer, Helicoverpa armigera (Hubner) population was first recorded during 41st standard week as 0.14 larvae per plant and peak population (4.02 larvae per plant) was observed during 46th standard week. The correlation analysis revealed that H. armigera population showed significant and negative correlation with relative humidity while the remaining weather parameters like temperature and rainfall were negatively and non-significantly correlated. The data of per cent field efficacy revealed that all insecticidal treatments were significantly superior over untreated control. However, the plots treated with combination insecticide Fipronil 5% + Buprofezin 20% SC @100+400 g a. i./ha recorded the highest per cent field efficacy (76.62%) while, sole insecticide Fipronil 5% SC @ 50 g a. i./ha recorded 52.08 per cent field efficacy.