author(s)
Jagrati Upadhyay, SB Das and S Chakrabarti

abstract
Predation is of incredible biological, transformative and conducts intrigue. For the present research, the essential explanation behind considering it is to decide the job of spider in management insect pests in field crops. A trial was directed in Biocontrol lab. of Jawaharlal Nehru Krishi Vishwavidyalaya Jabalpur (M.P.) India. For resolving the category of functional response in spider - Oxyopes birmanicus (Araneae: Oxyopidae) exists as the test predator on prey, Aphis craccivora (Homoptera: Aphididae) that is revealed as type II response. The trial was led in CRD where different densities of A. craccivora are taken as treatments for Analysis of Variance. Treatments found to be significant at 5% level of significance. The consumption rate of spider belonging from oxyopidae ranges from 9±1 on a mean; our estimate of the utmost predation percentage of A. craccivora attacked in 24 hours was 95% for both the trails of O. birmanicus.