Predator-prey relationship among selected species in the croplands of Central Punjab, Pakistan
2011
Inayat, T.P. (University of Agriculture, Faisalabad (Pakistan). Dept. of Zoology and Fisheries) | Rana, S.A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Zoology and Fisheries) | Rana, N. (University of Agriculture, Faisalabad (Pakistan). Dept. of Zoology and Fisheries) | Ruby, T. (University of Agriculture, Faisalabad (Pakistan). Dept. of Zoology and Fisheries) | Siddiqui, M.J.I. (Government Islamia Degree Coll., Faisalabad (Pakistan)) | Khan, M.N.A.
Predator-prey relationship is of great importance in the agro-ecosystems. Insects being the largest group of arthropods have a major role in designing various management strategies against different crop pests. Theoretically, these interactions influence the structure and dynamics of an agro-ecosystem and the present project is a good example of this .A mathematical model was proposed and analyzed to study the dynamics, of autonomous predator- prey model with a logistic abundance ratio. The major coleopteran predators; Coccinella septempunctata, Coccinella undecimpunctata, Cheilomenes sexmaculata Hippodamia variegata and Calosoma maderae and important hemipteran prey/pests; Schizaphis graminum, Aphis maidis, Macrosiphum miscanthi , Aphis gossypii and Diuraphis noxia were sampled from mixed crop agro-ecosystems of Central Punjab. The study was conducted to find the monthly abundance ratios of each predator species with all of the prey species in wheat, fodder and brassica crops. A graphed horizontal straight line was taken as constant predator-prey relationship. Chisquare test was applied on the relative abundance of a predator with selected prey species. Accordingly, most of the predators in different crops (wheat fodder and brassica) depicted a straight line showing least changes in nearly all monthly samples with S. graminum. By using such results species specific biological control can be implemented against targeted pests of the cropland.
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