Effectiveness and biochemical effects of neem against different species of grasshoppers (Orthoptera: Acrididae)‎

الملخص EN

Efficacy of neem was tested against 3rd, 4th and 5th nymphal instars of different species of grasshoppers at El-Baharia Oasis Western Desert of western Egypt by using micron Ulva sprayer (ULVA+).

Mortality percentages were calculated after 2, 4, 6, 8, 10 and 12 days post treatment.

The results showed that there is no mortality in the check (untreated after 2, 4, 6, 8, 10 and 12 days).

Data cleared that the percentages of mortality of nymphal instars of grasshoppers were 10, 15, 25, 30, 65, 88 % after 2, 4, 6, 8, 10 and 12 days post treatment, respectively.

The effect of neem on ALP, AST and ALT activity were tested.

ALP activity showed that significant decreased between treatment insect, 5.09, 11.6 and 14.22(U) and control 12.9, 14.4 and 16.2 (U) after 2, 4 and 6 days posttreatment.

AST activity was significant increased between treatment insects 68, 57 and 49 U/gm body weight and control 22, 28 and 34 U/gm body weight after 2, 4 and 6 days posttreatment.

Also ALT activity was significant increased between treatment insects 73, 76 and 69 U/gm body weight and control 19, 26 and 37 U/gm body weight after 2, 4 and 6 days after treatment.The efficacy of neem in all treatments can be useful for development safe elements for an IPM strategy to grasshoppers.