BIOATIVIDADE DE ÓLEOS VEGETAIS E FUNGOS ENTOMOPATOGÊNICOS EM MOSCA-DAS-FRUTAS Ceratitis capitata (Wiedemann, 1824) (Diptera: Tephritidae)

Abstract

Altough the fruit fly Ceratitis capitata (Wiedemann, 1824) (Diptera: Tephritidae) be one of the most important insect pests of the fruit growing, yet there is no effective method of control. In this sense, the objective of this study was to evaluate the action of vegetable oils and entomopathogenic fungi on the fruit fly C. capitata. The experiments were conducted in the Laboratory of Entomology, Department of Plant Science and Environmental Sciences, Centro de Ciências of Universidade Federal da Paraíba, at 25 + 2° C, RH 70 + 10 %, and photophase of 12 h. In the first test were conducted applications of Beauveria bassiana and Metarhizium anisopliae, in third instar larvae and pupae of C. capitata at concentrations of 4,0; 6,0; 8,0; 10,0; 12,0 g/L and 2,0; 3,0; 4,0; 5,0; 6,0 g/L respectively and distilled water as standard treatment. The evaluation of fungi efficiency was made by counting the emergence of insects. The data were subjected to analysis of variance and the means of the treatments were compared by Tukey test (p<0.05). In the second test were used mature siriguela (Spondias purpurea) treated with vegetable oils canola, flaxseed, corn and sunflower in the concentration 0,5; 1,0; 1,5; 2,0 and 2,5% and the application of distilled water as standard treatment. The evaluation of the action of the oils was made by counting larvae/fruit and the data were subjected to analysis of variance, and according to the significance of F-test, regression was applied to negative binomial distribution using generalized linear model glimmix with R2 greater than 70%. It was found that vegetable oils showed reduction in the development of C. capitata in fruits of sirigueleira, and can be used as a tool in the control of insect pests; and that the fungus B. bassiana was more efficient in mortality of this species of insect than M. anisopliae, especially in the larval stage.