Economic evaluation of different insecticides against cotton spotted bollworm Earias insulana (Lepidoptera : Noctuidae)‎ on okra plant

Abstract EN

Field strain of cotton spotted bollworm Earias insulana (Boisduval) (Lepidoptera: Noctuidae) on okra was treated by selected pesticide and natural compounds to evaluate their toxicity against E.

insulana.

Under okra field conditions, malathion, lambda, achook, and naterlo oil.

The 1St and 2nd spraying application of achook® and naterlo oil® proved to have relatively, equal efficiency against the insect population and gave merely equal values of general mean of reduction comprised 53 , 55 .

59 and 45 % respectively.

The results of the growing season of 2018 were similar to that obtained results in season of 2019 the general mean of reduction percentage for applied 1St spray of achook® and naterlo oil® indicated that the efficiency of both tested oils upon the population were gave values of reduction comprised 47% and 40 % , respectively .

These constant costs were expressed in the varied agricultural practices throughout the growing season of labour rases/ fed 200 for each of all performed treatments achook and naterlo oil, 100 for malathion and lambda.

Moreover, extracted values of the additional return over the untreated control, in the different treatments were 24000, 18000, 48000, 42000 and 0,00 for achook, naterlo oil, malathion , lambda and control, successively.

Through the profits for one Egyptian pounds investment were 2500, 2500, 10000, 10000 and 0, 00 for achook, naterlo oil, malathion , lambda and control, respectively.