The results obtained in this study indicate that emamectin benzoate, indoxacarb and chlorantraniliprole are potent compounds for controlling A. Data also indicated that emamectin benzoate had the longest half-life (Lt 50) while indoxacarb recorded the shortest one. Based on the field application, emamectin benzoate proved to be the most effective in initial and residual activity, causing 100% mortality while indoxacarb was least effective. According to the results, the tested insecticides could be arranged according to their potency descendingly as follows: emamectin benzoate, indoxacarb, and chlorantraniliprole, respectively. Comparatively high concentrations (50 and 100 mg L −1) of the test compounds were necessary to affect adults by ingestion. Profoundly affected larvae died before pupation slightly affected ones reached pupation 2–4 days later, were smaller than larvae in the untreated control, and were sometimes unable to develop into normal adults. There was strong suppression of adult formation 65 and 91% at 25 and 50 mg L −1, respectively. 1st-instar larvae were the most susceptible developmental stage. Larvae that hatched from treated eggs were significantly affected at concentrations of 25 ppm and higher. The results showed that egg hatch was affected by high concentrations (50 and 100 ppm) of the tested compounds. The effects of these compounds on some biological aspects of the black cutworm, Agrotis ipsilon, and their field persistence residues were estimated. Emamectin benzoate, indoxacarb and chlorantraniliprole are broad-spectrum insecticides with a novel mode of actions. Still, there is an ongoing need to replace older conventional insecticides with new insecticides to maintain efficacy and environmental protection. Chemical control is used as a rapid and reliable method for insect control.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |