SCREENING BEST ADOPTED WHEAT LINES AGAINST APHID (SCHIZAPHIS GRAMINUM RONDANI) POPULATION

The study was conducted at the university college of agriculture, university of sargodha during 2009-2010 on four wheat genotypes to check the aphid attack on different sowing dates. aphid population a serious threat was observed and counted on four wheat genotypes to check the attack on different dates. it was observed that aphid population was maximum on february 24, then a decline behavior was observed up to march 8. again on march 8 up to march 17 a slump in aphid population was recorded. according to sampling results, inqalab- 91 remained least attacked genotype. population of both predators synchronized with aphid population with the highest synchronization during the end of february. the wheat cultivar v- 02192 should be considered in ipm program to minimize the infestation with aphids. this study revealed that late sown crop showed abundant while very low quantity in timely sown crop. early sown crop was least effected by aphid attack, which signified that wheat crop can set aside by modifying sowing dates. it was concluded that at sargodha vicinity aphid attack may be minimized significantly by planting wheat in end of november month.