Reducing the harmfulness of the main phytophages of oilseed flax
نویسندگان
1 Institute of Education and Management, West Kazakhstan Innovative Technological University, West Kazakhstan Region, Uralsk, Kazakhstan
2 Department of Biology, Plant Protection and Quarantine, Faculty of Agronomy, S. Seifullin Kazakh Agrotechnical Research University, Astana, Kazakhstan
3 Department of Biology, Faculty of Natural Sciences, M.H. Dulati Taraz University, Taraz, Kazakhstan
4 1. Department of Biology, Plant Protection and Quarantine, Faculty of Agronomy, S. Seifullin Kazakh Agrotechnical Research University, Astana, Kazakhstan
5 Institute of Veterinary and Agrotechnology, Zhangir Khan West Kazakhstan Agrarian Technical University, Uralsk, Kazakhstan
6 Institute of Veterinary and Agrotechnology, Zhangir Khan West Kazakhstan Agrarian Technical University, Uralsk, Kazakhstan
7 Department of Biology, Plant Protection and Quarantine, Faculty of Agronomy, S. Seifullin Kazakh Agrotechnical Research University, Astana, Kazakhstan
8 Ural Agricultural Experimental Station LLP, Uralsk, Kazakhstan
doi
10.22124/cjes.2025.8913چکیده
Production of oilseed flax, Linum usitatissimum L. in Kazakhstan is severely threatened by the losses inflicted by its key phytophages, namely the leaf beetle, Aphthona euphorbiae, the flax moth, Helcystogramma triannulella, and the peach green aphid, Myzus persicae. The study was conducted as a field experiment during two vegetation periods (2023-2024) in northern Kazakhstan to evaluate vulnerability reduction measures. Five treatments of management including chemical control (T1), biological control by release of Trichogramma evanescens (T2), combination of T1 + T2 + 1.5% potassium silicate mixture (T3), resistant cultivars (cultivar "Lina-3"; T4), and control (T5) were compared in a randomized complete block design with four replicates. The results indicated that integrated treatment (T3) was the best treatment with 68-54% reduction in pest density, 72.4% increase in defensive phenolic compounds (18.7 mg GAE/g DW) and peroxidase enzyme activity (4.92 units). The treatment significantly increased grain yield by 1.82ton ha-1 (63.7% greater than control). Resistant cultivar "Lina-3" (T4) was also found to be a suitable option for low-input systems with a 5.1:1 benefit-cost ratio. The findings confirm the effectiveness of the integrated approach on the grounds of fortification of plant defense mechanisms, conservation of natural enemies and rational chemical treatment as a sustainable model of pest management in oilseed flax agroecosystems of Kazakhstan.
