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- Title
RESPONSE OF BT COTTON GENOTYPES TO THE INFESTATION OF SUCKING AND BOLLWORM PESTS WITH RESPECT TO DIFFERENT PLANTING DATES.
- Authors
Khan, Muhammad Hamayoon; Asif, Muhammad Usman; Memon, Raza Muhammad; Akbar, Waseem; Khurho, Niaz Hussain; Awais, Muhammad
- Abstract
Change in sowing time of crops is one of the important tools of integrated pest management that helps to escape or reduce the attack of certain insect pests. The present experiment was designed to evaluate the effect of three different sowing times viz. early (April), medium (May), and late (June) on the performance of five transgenic cotton genotypes ((IR-443, IR FH-901, IR-448, IR NIBGE-1 and IR-1513) against sucking and bollworm pests. The results revealed that the early sown (April) genotypes rendered higher jassid infestation compared to medium (May) and late sown (June) genotypes. The highest incidence of thrips and whiteflies was recorded on the late sown genotypes followed by medium sown genotypes. Bollworms (Pink and spotted) infestation did not reach to the Economic Threshold Level (ETL) in any of the early, medium or late sown genotypes, however, the late sown genotypes showed the highest bollworms occurrence. Significantly higher yield (kg/ha) was produced by the early sown (April) genotypes followed by medium sowing (May). Among all the transgenic cotton genotypes tested in early, medium and late sowing dates, IR-443 proved to be significantly the most efficient genotype in term of showing the lowest pest incidence and highest cotton yield followed by IR-FH-901. The studies manifested that sowing of the latter two cotton genotypes in April (early sowing) could be very effective to deal with major pest population and getting higher yield.
- Subjects
PINK bollworm; INTEGRATED pest control; BT cotton; COTTON yields; ALEYRODIDAE; COTTON genetics
- Publication
Pakistan Entomologist, 2019, Vol 41, Issue 1, p27
- ISSN
1017-1827
- Publication type
Article