Some biochemical studies were carried out on 4th instar larvae of Pink bollworm (PBW) treated as
neonate larvae with LC50 for four tested compounds (Methomyl, Pyridalyl, Teflubenzuron and Verticillium
lecanii). Results obtained indicated that all treatments decreased protein levels as compared with control, it
recorded - 40.47, - 50.48, -55.02 and - 60.39 %. The total soluble lipid was estimated by 8.02, 7.94, 3.93 and 6.70,
respectively. The percentage of high decrease was - 48.13% when larvae treated with (IGR) Teflubenzuron. An
exception in Carbohydrate hydrolyzing enzymes activities was clearly obvious in invertase; it decreased by -
21.99% in V. lecanii treatment than in control. Great reduction in GOT and GPT transaminases activity in P.
gossypiella treated with all tested compounds. Low increase in acid phosphates enzyme (1.85%), while high
reduction percentage in alkaline phosphates (-59.46) in V. lecanii treatment than control. Chitinase enzymes
were increased in moderate percentages in both Teflubenzuron and V. lecanii (23.66 and 29.84%, respectively). |
