Batoul Ahmad(1)*, Sawsan suleiman(1) and Mohammed Ahmad(1)
(1). Faculty of Agriculture Tishreen University, Lattakia, Syria
(*Corresponding author: Batoul Ahmad, Email: batoulandjanalma@gmail.com)
Received: 3/02/2023 Accepted: 2/05/2023
Abstract:
The effect of foliar application of (4 years) lemon trees Santa Teresa in Tartous suburb, Beit Zeina village with Chitosan (200-300-400 ppm) on catalase antioxidant activity, Leaves content of salicylic acid, calcium, and leaf morphometric characteristics and their influence on citrus leaf miner Phyllocnistis citrella biology: Pupa’s length and eggs number, under the conditions of field were investigated. The results showed that treatments with Chitosan (300-400) reduced the catalase activity 0.273-0.239 mmol min-1 g-1 FW and the content of H2O2 in leaves 1.230 -2.516 nmol g-1 FW. Chitosan 300 increased the content of salicylic acid in leaves to (20.505 μg/mg), Chitosan 400 enhanced leaf calcium content by 7.1% and leaf thickness 2.033 mm, and reduced damaged leaf area by up to 15.69%, both treatments reduced pupa’s length 2.1 mm comparing to control 2.77mm. Chitosan 200 reduced eggs’ number to 7 eggs compared to control 18 eggs and increased leaf area to about 44.49 cm2.
Keywords: Chitosan , Lemon Santa Teresa, Antioxidant enzyme, Salicylic acid, Calcium, morphometric characteristics of leaves, Citrus leaf miner.
Full paper in Arabic: pdf