Status of trophic guild of invertebrates utilizing weeds of wheat and sugarcane fields of Faisalabad.

摘要

Qualitative synergy level of prey/pest-predator invertebrate populations occurring on weeds of sugarcane and wheat crops was evaluated on the basis of their relative occurrence on the weeds. Seventeen weed species common in and around wheat field harboured 50 species of predators including insects and spiders in addition to 20 known pest species of different crops. These weeds also harboured 14 recycler species. The ratio of pest/prey-predator in the wheat fields was high. Whereas eight weeds common in sugarcane fields harboured 13 species of predator insects and spiders. These weeds were observed to bear 17 known pest species of some major crops in addition to 28 recycler species playing key role (scavenging, fragmenting and decomposing) in some sort of ambient environment of cane fields.