Feeding behaviour and life durations of Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) feeding on a variety of hosts
It is investigated that a perennial grass leaves orientation provides a hiding place for aphids to escape from the attack of green lace wings.Traditionally predators of arthropods have been less discussed on the base of their special prey. The interactions of predator-prey are categorized on three trophic levels (i.e. Plants, predators and prey). Predators are at the top of food linkage and interact between just for a shared prey. Research on influence of different hosts on biology of Chrysoperla carnea (Stephens) were examined under laboratory conditions at 26±2 °C and 65±5% R. H. shows that the incubation period of eggs of C. carnea females eating different hosts as immatures are significantly (P<0.001) different from each other. The natural hosts are: cotton aphids, Aphis gossypii (Glov.) (nymphs/adults), American bollworm, Helicoverpa armigera (Hb.) (eggs), Pink bollworm, Pectinophora gossypiella (Saund.) (eggs), cotton mealy bug, Phenacoccus solenopsis (Tinsley) (Pseudococcidae: Homoptera) (nymphs) and Angoumois grain moth, Sitotroga cerealella (Oliver) (frozen eggs). The present study was done to observe predatory behaviour of chrysoperla carnea and how it can successfully be implied in initializing an effective biological control programme. The study was started from April, 2016 and research was finalized on October, 2016.