Vol. 4, Issue 3 (2019)
Population dynamics of sucking pests in liaison with transgenic Bt. v/s non-Bt. cotton varieties (Gossypium hirsutum L.), at innumerable temperature & relative humidity
Author(s): Syed Ahtisham Masood, Muhammad Mazhar Saleem, Syed Burhan UD Din, Muhammad Yasin, Shahbaz Ahmad, Said Salman6, Qurban Ali
Abstract: Cotton with diversified charisma to thrive in far-reaching agro-climatic zones, export value, multiple by products and stake in domestic earning is factual white gold to Pakistan. Predominantly whitefly (Trialeurodes vaporariorum/ Bemisia tabaci), jassid (Amrasca devastans) and thrips (Thrips tabaci) are distressing the seed-cotton production in Pakistan. So, Contemporary study was premeditated to climax the population subtleties of listed sucking pests on Bt v/s non-Bt varieties at different episodes of temperature and relative humidity. Data on insect population from three fully stretched leaves from top, middle and bottom portions of single plant each, in dawn and ecological factors were documented for fifteen consecutive weeks from physiology department. Results established that population of whitefly and jassid was more on Bt varieties (transgenic) as compared to Non-Bt (non-transgenic) cotton varieties but it was almost same for thrips. Temperature and relative humidity were positively associated with whitefly, jassid and thrips population, whereas relative humidity was negatively correlated. Further, Maximum population of whitefly was recorded on V4 (FH-113) and the minimum population was on V3 (FH-154). Maximum population of jassid was noted on V2 (FH-1000) and the minimum population on V1 (CIM-496). Whereas, maximum population of thrips was recorded on V1 (CIM-496) and the minimum was on V5 (FH-114).