Samer Al- Amer*¹

1 Syrian Grain company, Deir Ezzor, Syria
(*Corresponding author: Dr.Samer Al-Amer, E-mail: sa10.8.1978am@gmail.com).

Received: 23/ 11/ 2025     Accepted: 22/ 01/ 2026

Abstract: 

This research was conducted in the Faculty of Agricultural Engineering at Al-Furat University in Deir ez-Zor, Department of Plant Protection, during the 2024, and the purpose of  this research is to determine the  the possibility of using Bacillus thuringeinsis var kurstaki Bacteria in combating the potato tuber moth(Phthorimaea operculella) under laboratory conditions(Temperature 25º±1 , photoperiod 12 light:12 darkness , Humidity 70±5). Different concentrations of B.th bacterial suspension (%0.125 ,%0.25 ,% 0.5 , %1) were used to treat potato tubers on which potato tuber moth larvae fed. The percentage of death of F1 individuals of the potato tuber moth in the larval and pupal stages increased with increasing concentration of Bacillus thuringiensis var kurstaki  bacteria The 1% concentration was significantly superior to the other concentrations of B.th bacteria in increasing the percentage of death in the larval and pupal stages, as the percentage reached 78.8%. The percentage of deformed insects of the potato tuber moth increased at a concentration of 0.125%, compared to the concentration 0. 25%. and the control treatment. Where the percentage reached 3.83%. It was noted that the average weight of F1 pupae fed on tubers treated with Bacillus thuringiensis var kurstaki bacteria decreased significantly and clearly at the 0.25% concentration of bacteria compared to the concentration 0.125%. and the control treatment.

Keywords:Bacteria Bacillus .thuringiensis var kurstaki. Potato tuber moth(Phthorimaea operculella). pupal. larva

 Full paper in Arabic: PDF