author(s)
Muhammad Farooq, Tayyab Shaheen, Muhammad Rafiq Shahid, Hafiz Ghazanfar Abbas, Muhammad Rizwan, Riaz Ahmad Kainth, Nabeel Shaheen and Muhammad Asad

abstract
The present study aimed at screening fifteen genotypes of cotton (Gossypium hirsutum L.) for population dynamics of Amrasca biguttula biguttula (Ishida). This study was carried out at the Cotton Research Station, Faisalabad, Pakistan during the two cropping seasons 2016 and 2017. The experiment was conducted under Randomized Complete Block Design (RCBD) with three replications. The results showed that FH-142 proved to be least attractive cultivar with 0.33 jassid /leaf in October-2016 and 0.67 in September while in 2017 A. biguttula biguttula population observed was 0.67/leaf in October and May, 1.67/leaf in September and 2.67 /leaf in June. The maximum population of A. biguttula biguttula was recorded on FH-490 (7.33/leaf) followed by FH-152 and FH-453 (7.00/leaf) during 2017. On a cumulative basis, highest peak of A. biguttula biguttula population was observed on FH-450 (6.00/leaf). In conclusion, advanced genotypes of transgenic cotton proved to resist the population buildup of A. biguttula biguttula throughout the period of study.