Riad  Tofik Zidan⁽¹⁾ Mohammad Ahmad  Ahmad⁽²⁾ and Alisar Nadim Shaabow^*(1)

(1). Department of Horticulture, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

(2). Department of Plant Protection, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

(*Corresponding author:  Eng. Alisar Shaabow. E-Mail: alisar.nadeem@yahoo.com).

Received: 24/12/2018                               Accepted: 24/02/2019

Abstract

The effect of the infection of the  two spotted spider mites and using the predatory mite Phytoseiulus persimilis Athias-Henroit, as biological control agent to control it,  and its effect on the quality of the bods of climbing beans cultivars: Kentucky wonder white, Blue lake, Fatima, Purple Queen, Zilioni and Gigant.  The study was carried out at a greenhouse at Lattakia Center for Rearing Natural Enemies during 2017 and 2018. Results showed a negative effect of T. urticae on the pod’s quality that it decreased its contents of  soluble solids, fibers, dry matter, protein and vitamin C, and it increased nitrates contents. While  releasing the predatory mite P. persimilis on the infected plants controlled this pest and improved pod’s quality, and that it increased its contents of  soluble solids, fibers, dry matter, protein and vitamin C, and conversely it decreased nitrates. In terms of Beans cultivars the results showed that the higher content of dry matter was attained in Kentucky wonder white and Blue lake cultivars’ pods, while the higher content of  soluble solids, fibers, protein, vitamin C, and the lower content of nitrates was notices in Fatima’s pods.

Key words: Climbing bean, Greenhouse, Cultivar, Tetranychus urticae, Phytoseiulus Persimilis

Full paper in Arabic: PDF