Leafminer, Tuta absoluta and the influence of the sprayer type

Document Type : Original Article

Authors

Pesticide Chemistry and Technology Dept., Faculty of Agriculture, Alexandria University

10.21608/jpces.2016.459318

Abstract

The tomato leafminer, Tuta absoluta (Meyrick) (Lepidoptera: Gelichiidae), is the major limiting factor for tomato production. The use of insecticides based on different chemical groups and with varying modes of action is an important component of an integrated pest management strategy. The efficiency of some insecticides and bioinsecticides regimens and in combination against the tomato leafminer, Tuta absoluta was investigated. The influence of the sprayer type on the insecticides efficiency and the chlorophyll content of tomato leaves were tested. The results indicated that no significant differences were recorded among all tested regimens. However, regimen 2; spray of imidacloprid, indoxacarb and Bacillus thuringiensis (Bt) +mineral oil and regimen 3; spray of chlorpyrifos methyl, lufenuron and spray
abamectin were higher in the reduction percentages than that of regimen 1; drench of imidacloprid, spray of pyridalyl and Bt and regimen 4; spray of diazinon, mineral oil and emamectin benzoate. Moreover, the inhibitory effect of different treatments on the chlorophyll content was lower than that of the untreated check. Regarding to the general mean, it was observed that, using of Engine-Powered Knapsack sprayer decreased the side-effects of tested insecticides on the chlorophyll formation. However, the efficiency of tested treatments against T. absoluta was lower when used Engine-Powered Knapsack sprayer than that of used Hydraulic handgun sprayer. 

Keywords

Journal of Pest Control and Environmental Sciences
Volume 21, Issue 1
2016
Pages 54-64

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