Induced Resistance in Bell Pepper by Trichoderma Harzianum T22 and Jasmonic Acid Against Frankliniella Occidentalis (Thysanoptera: Thripidae)
نویسندگان
1 Department of Plantprotection, Faculty of Agriculture, Bu- Ali Sina University, Hamedan, Iran
2 Department of Plantprotection, Faculty of Agriculture, Bu- Ali Sina University, Hamedan, Iran
3 Biological Control Research Department, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
doi
10.22034/jesi.45.3.6چکیده
The western flower thrips (WFT), Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) is one of the important greenhouse insect pests with a wide host range. In this study, the effect of treating bell pepper with jasmonic acid (JA) (0.5 mM), Trichoderma harzianum strain T22 (Th) (10 ml per plant from 1×107 spore/ml suspension), and the jasmonic acid with T. harzianum (JA + Th) on the growth and physiological characteristics of the pepper plants, adult selection and oviposition preference (free-choice and no-choice tests), and the life table parameters of WFT were investigated. The experiments were carried out in constant environmental conditions at 25±1 °C, 65±5% RH, and L16: D8 photoperiod. Based on the results, all life table parameters of WFT showed a significant difference. The intrinsic rate of increase (r) for control and JA, Th, and JA + Th treatments were 0.1827, 0.1513, 0.1636, and 0.1332 (day-1), respectively. The net reproductive rate (R0) for the mentioned treatments was estimated as 22.53, 32.72, 38.99, and 25.62 (eggs/individual). The JA + Th treatment increased the growth and physiological characteristics of the pepper plants and had low nutritional quality for the pest. The results of this study can be used in the application of JA + Th treatment for integrated management programs of WFT.
