Ritta Alhayek (1)*, Samir Tabbache (1), Ahmad Ibrahim Kara Ali (2) and Mohammad Ahmad(1)
(1). Department of Plant Protection, Faculty of Agriculture, University of Tishreen, Latakia, Syria.
(2). High Institute of Marine Research, Tishreen University, Latakia, Syria.
(*Corresponding author: Ritta Alhayek, E- Mail: rittaadnanalhaik@tishreen.edu.sy)
Received: 6/01/2022 Accepted: 23/05/2022
Abstract:
The research was carried out in Latakia province in green house in Jableh countryside during 2019 to test the efficacy of the pesticide chlorantraniliprole and Silica Nano particles in addition to their mixture against the larvae of tomato tuta absoluta under greenhouse conditions. The results showed that there were significant differences between all treatments and the control in terms of the number of live larvae /plant, and the most effective pesticide was chlorantraniliprole 63.85% after 7 days of the first spray, and it reached 69.95 a week after the second spray in a row, followed by Nanosilica particles 750 and 1000 ppm with a percentage of 53.83 and 55%, respectively, and its efficacy increased to 67 and 69%, a week after the second spray also, respectively. The pesticide chlorantraniliprole and Silica Nano particles 1000ppm reduced the number of the larvae tunnels with a significant difference with the control and the rest of the treatments in all periods of the experiment, and the percentage of decrease was 41 and 32.4% respectively after three weeks of spraying while it was 26.6 and 15.4% in the treatment Silica Nano particles 750ppm and the pesticide mixture chlorantraniliprole with Silica Nano particles (250ppm) respectively at the same period .The results showed that each of the pesticide chlorantraniliprole and Silica Nano particles 1000 ppm was significantly superior to the rest of the treatments in terms of the severity of infection by the hoof on the fruits, and their efficacy was 76.8 and 63.1%, respectively, and the treatments of Silica Nano particles 750 ppm and (chlorantraniliprole + Silica Nano particles) reduced the severity of infection on fruits by 50.8 and 53.7% with a significant difference between it and the control after two weeks of the second spray.
Keywords: Nanosilica, chlorantraniliprole, efficacy, tomato moth, infection severity.
Full paper in Arabic: pdf