The Effect of Two Spotted Spider Mite in the Presence of the ‎Predator Phytoseiulus Persimilis Athias-Henroit on the Quality ‎of Some Climbing Beans Cultivars under Greenhouse ‎Conditions ‎

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:

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


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

Host Susceptibility of Some Eggplant Cultivars Planting in Syria to Root-Knot Nematode Meloidogyne incognita

Maimounh Almasri *(1) Sobhia Alarabi(1) and Roudaina Albaka(1)

(1). General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.

(*Corresponding author: Dr. Maimounh Almasri. E-Mail:

Received: 29/09/2018                                Accepted: 19/01/2019


Six eggplant cultivars (Ramses, Rayan, Yakut, Black beaty, Aydin siyoahi and Toros) were evaluated for their host suitability to Meloidogyne incognita in a completely randomized design experiment, with five replicates, for tow growing seasons 2015 and 2016 in outdoor pot experiments at the General Commission for Scientific Agricultural Research, Syria. 40 days after planting, seedlings were inoculated with 5,000 eggs and freshly hatched J2 /plant of M. incognita. Results showed that all cultivars were damaged by root-knot nematode infection (Gall index=5) and were supportive for nematode reproduction (RF> 1), ranging from susceptible to highly susceptible to the M. incognita. Cultivar Toros was the most supportive for multiplication of nematodes (RF = 4.7; 198.6 egg bags / 1 g root), while Aydin siyoahi was the lowest (RF = 1.3; 198.6 egg bags / 1 g root). A positive correlation was noticed between the nematode reproduction factor and both the number of root gall and egg masses/root (r = 0.55 and 0.99, respectively). There was also a significant decrease in plant height and vegetative weight compared to the control.

Key words:  Cultivar, Eggplant, Reproduction factor, Gall index, Meloidogyne incognita.

Full Paper in Arabic: PDF