Efficacy of Selected Insecticides and Botanicals in the Control of Field Insect Pest of Okra (Abelmoschus Esculentus) in Akure
Citation :Benson G.A.S, Efficacy of Selected Insecticides and Botanicals in the Control of Field Insect Pest of Okra (Abelmoschus Esculentus) in Akure International Journal of Forestry and Horticulture 2017,3(4) : 1-5
A randomized complete block field experiment was conducted to evaluate the insecticidal efficacy of selected synthetic insecticides and botanicals for the control of insect pests of okra (Abelmoschus esculentus) L Moench at the Teaching and Research Farm of The Federal University of Technology, Akure (70 16'N, 150 12'E). The experiments consisted of four rates (50, 75, 100, and 125%) of lambda-cyhalothrin, dichloropyrivos and carbaryl and two extraction methods comprising of hot and cold extracts of Piper guineense, Allium sativum and Azadirachtaindica including their mixtures. The treatments were sprayed twice and thrice while assessments of insecticidal efficacy based on Henderson Tilton formular was conducted at 2, 4 and 6 week after treatment application. Insect counts were collected and percent efficacy calculated. Result obtained shows that there was a general decline in insect population as the insecticide application continued and all the biocides were significantly (P< 0.05) toxic to the flea beetles than the control. Carbaryl performance exceeded all other insecticides in the parameter measured. Although the performance of the botanicals is not as good as synthetic insecticide, it was better than the untreated control plot. It is concluded that A. indica, P. guineense and A. sativum (in order of importance) can be used as an alternative to the synthetic insecticides tested in this study for the control of flea beetle and other insect pests on okra.