Author(s)

Ghazwan Alsaedi^1,2, Ahmad Ashouri^1*, Reza Talaei-Hassanloui¹

¹Department of Plant Protection, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
²University of Basrah, Basrah, Iraq.

The tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is among the most destructive pests that attack tomato in many countries. In this study, the efficiency of three suspensions (10⁶; 10⁵; 10⁴ cell/ml) of Bacillus thuringiensis var. Kurstaki was tested on T. absoluta larvae 1^st, 2^nd, 3^rd and 4^th instar was assessed to study the effect of these suspensions on larval mortality. Results showed that the concentration 10⁶ cell/ml resulted in the highest mortality of all instars larvae with an average mortality of 20%, 22.66%, 18.66% and 23.33% was recorded for the first, second, third and fourth instar, respectively. The greatest percentage of mortality occurred in the third day after the larvae fed with leaves treated with suspension B. thuringiensis.

Bacillus thuringiensis var. Kurstaki, Three Suspensions, Tuta absoluta, Mortality, Four Larvae Instar

Alsaedi, G. , Ashouri, A. and Talaei-Hassanloui, R. (2017) Evaluation of Bacillus thuringiensis to Control Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) under Laboratory Conditions. Agricultural Sciences, 8, 591-599. doi: 10.4236/as.2017.87045.