Population dynamics of Hemipteran insects on pigeonpea (Cajanus cajan) and its correlation with abiotic factors

A field experiment was carried out during rainy season of 2012 at Jabalpur, Madhya Pradesh to determine the population and correlation with abiotic factors of Hemiptaran insects on pigeonpea (Cajanus cajan L.). Population of different Hemiptaran insects was observed from 36^th standard week (first week of September 2012) to 5^th standard week (last week of January to first week of February 2013). The abiotic factors also affected the population built up of the insect pests. Jassid (Empoasca fabae Harris) population exhibited significant correlation with maximum and minimum temperatures and evaporation, whereas stink bug population was correlated with wind speed. However, there was negative correlation between evaporation and pod bug nymph and adult population.