Ibrahim Aziz Sakr(1) and Usama Sagee Sheban*(1)
(1). Department of Plant Protection, Faculty of Agriculture, Tishreen University, Lattakia, Syria.
(*Corresponding author: Usama Sagee Sheban. E. Mail: samasheban@yahoo.com).
Received: 01/05/2018 Accepted: 10/07/2018
Abstract
Within the efforts to control the harmful mites using environmentally safe methods, a study was carried out at a greenhouse planted with eggplant in Al-Bassa area , in Latakia governorate during the agricultural season 2016/2017 to evaluate the effectiveness of a number of plant extracts on Tetranychus urticae Koch 1836 (Acari: Tetranychidae) worldwide and very harmful to many hosts in greenhouse and field. The study included the seeds and leaves of Chinaberry, seeds and leaves of Cypress Lemon, seeds and fruits of River Red Gum, flowers and leaves of Oleander, and corms and leaves of Wild Arum. The Vaseline rings method was adopted and criteria: the average of mortality for the treated stage and fertility were calculated. The results showed that the highest efficacy was found when using the extract of the seeds of Chinaberry on adult females and on the first nymphs (65.4 and 69.3%, respectively). The lowest fertility was recorded with the extract of Oleander leaves (8.17%), which had the most effect on egg hatching (87.4%). It is worth to mention that the extracts of seeds, fruits and corams gave higher efficiency than the leaves extracts, and leaves extracts were higher than the efficiency of floral extracts against T. urticae phases.
Key words: Two-spotted red spider mite, Tetranychus urticae, Eggplant, Vaseline rings, Plant extracts.
Full Paper in Arabic: PDF