Tag Archives: Tetranychus urticae

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: 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

Plant Extracts Use Importance in Controling Tetranychus urticae Koch on Eggplant Solanum melongena L. Under Protected Farming Conditions

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

Controlling the Population of Tetranychus urticae Koch on Tomato under the Greenhouse Conditions Using some Chemical and Biological Treatments

Ibrahem Azez Sakr(1) Majeda Mhamed Mofleh(2) and Randa Ahmed Suliman*(1)

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

(2). General Commission for Scientific Agricultural Rsearch GCSAR, Damascus, Syria.

(*Corresponding author: Dr. Randa Ahmed Suliman. E-Mail: randasuliman65@gmail.com).

Received: 05/09/2019                                Accepted: 27/10/2019

Abstract

Research was conducted to evaluate the efficacy of integration between using the pesticides Acetamiprid, Abamectin and Pyridaben and the aqueous extracts of both   Melia azedarach L. and Sytrax officinalis L. then releasing the predator Stethorus glivifrons Mulsant with to manage the population of Tetranychus urticae Koch on Tomato Lycoersicon esculantmin at the greenhouse in 2018. The Experiment was conducted using the complete randomized block design, where the results of the research showed that the extracts of both M. azedarach L. and S.officinalis L. had efficacy recorded 62.29 and 50.93 % respectively in the first week. The efficacy decreased in the first and the second week after releasing the predator, then it raised again in the third and the fourth weeks to record 62.54, 54.72 % for each of them. Thus, it could be stated that the extracts efficacy coincided with the release of the predator S. glivifrons. A decrease in the influence of the specialized insecticide Acetamiprid was recorded, while it reached its top after the release of the predator in the fourth week 33.77 % due to the negative influence of the pesticide on the predator and the population was incapable to be adequate to control the harmful population of T. Urticae. The specialized acaricide Pyridaben was superior and recorded an efficacy exceeded 84% in the first week  before the application  and decreased in the first, the second and  the third weeks after the release of the predator without a significant difference between them, then increased in the fourth week after the releasing where it reached 73.72 % with a significant difference in all the times of the readings. Mortality percentage when acaricide Abamectin was used, recorded 61.14 % after 24 hours of the treatment, then highly increased to 70.72 % in the first week after the release of the predator. The efficacy decreased in the first and the second weeks after the release which recorded 70.72 and 65.21 % respectively with a significant difference between them. Then it increased again in the third and the fourth weeks after the release to reach 79.62 and 80.70% without significant differences between them. Thus, the predator was capable to re-raise the mortality percentage after falling in the first and the second weeks after the release to get it back to where it was when the predator efficacy reached the highest influence in the first week.

Key words: Plant extracts, Chemical pesticides, Tetranychus urticae, Stethorus glivifrons, Lycoersicon esculantmin, Syria.

Full Paper in Arabic: PDF

The Efficacy of The Integration of Plant Extracts, Chemical Pesticides and Releasing The predator Phytoseiulus  persimilis A-H in Controlling The Population of Tetranychus urticae K on Tomato in The Greenhouse Conditions

Ibrahim Aziz Saqr(1) Magedah Mohammad Mofleh(2) and Randa Suleman*(1)

(1). Plant Protection Department, Faculty of Agriculture, Tishreen University, Latakia. Syria.

(2). General Commission of Agricultural Scientific Research (GCSAR), Damascus, Syria.

(*Corresponding author: Eng. Randa Suleman. E-Mail: randasuliman65@gmail.com).

Received: 18/05/2018                                Accepted: 05/06/2018

Abstract

The research was conducted in order to assess the efficacy of the integration between the use of the aqueous extracts of both Melia azedarach L. and Styrax officinalis L. and the pesticides Acetamiprid, Abamectin and Pyridaben and releasing the predator Phytoseiulus persimilis Athias-Henriot in controlling the population of Tetranychus urticae Koch on tomato Lycopersicum esculentum under the greenhouse conditions. Results showed that both extracts M. azedarach L. and S. officinalis  L. have an effect reached to 50.99 % and 40.29 %, respectively after 24 hours of the experiment with no significant difference between them. The efficacy increased to 77.19 % and 70.18 %, respectively in the fourth week after releasing the predator Ph. persimilis with a significant difference. The acaricide Pyridaben surpassed the Abamectin where the efficacy recorded 63.13 and 62.07%, respectively after 24 hours of the experiment but with no significant difference. The predator Ph. persimilis was able to generate a population that was able to control the population of T. urticae with integration of Abamectin in the fourth week of the experiment after releasing the predator. The efficacy recorded 86.03%, it had the highest effect comparing to the other treatments with a significant difference except with the Pyridaben treatment.

Key words: Plant extracts, Chemical pesticides, Tetranychus urticae, Phytoseiulus persimilis, Lycopersicum esculentum, syria.

Full paper in Arabic: PDF

The Efficacy of Some Fungicides, Insecticides, Acaricides and Foliar Fertilizers Against Two-spotted Spider Mite Tetranychus urticae Koch

Atie Arab*(1) Rawa Youssef(1) and Deena Faeud(1)

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

(*Corresponding author: Dr. Atie Arab. Email: atiearab@hotmail.com).

Received: 20/05/2017                                Accepted: 23/09/2017

Abstract

Two experiments (in vitro and in greenhouse) were carried out at Agricultural Scientific Research Centre in Lattakia during 2014, to evaluate the efficacy of some fungicides, insecticides, acaricides and foliar fertilizers (methomyl, chlorpyriphos, flubendiamide, lufenuron, propamocarb hydrochloride, thiophanate-methyl, chlorothalonil, copper oxychloride, K2O35%+SO345%, abamectin) against two-spotted spider mite Tetranychus urticae Koch. on common beans plants (Phaseolus vulgaris L.) which were artificially infected with sensitive strain of two-spotted spider mite reared in the laboratory. The effectiveness of pesticides and foliar fertilizer were tested at the recommended concentrations. Results showed that some evaluated pesticides effectively reduced two–spotted spider mite population comparing with acaricide Abamecten. The insecticides chlorpyriphos and methomyl showed high effectiveness (100% and 89.11%) respectively, after 3 days of treatment under laboratory condition. Foliar fertilizer K2O35%+SO345%, had relatively good efficacy (74.68%) with no significant differences versus acaricid Abamectin after 3 days of treatment under the greenhouse condition. On the other hand, the effectiveness of the fungicide chlorothalonill was relatively low (31.53%), after 7 days of treatment in the laboratory.

Key words: Two-spotted spider mite, Tetranychus urticae, Chemical pesticides, Foliar fertilizers.

Full paper in Arabic: PDF

The Functional and Numerical Response of Predator Stethorus gilvifrons Mulsant fed on Different Densities of the Spider Mite Tetranychus urticae (Koch) in laboratory.

Magda Mofleh(1), AhmadMohammad(2)& MonzerHaloum(2)

(1). Scientific Agricultural Research Centre of Lattakia, Lattakia, Syria.
(2). Department of Plant Protection, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

(Corresponding author: Dr. Magda MOFLEH: Scientific Agricultural Research Centre of Lattakia, Lattakia, Syria. E-mail:Magda.mofleh@yahoo.com).

                      Received: 24 / 09 / 2014                                   Accepted: 01 / 12 / 2014

Abstract:

The functional and numerical response of Stethorusv gilvifrons on different densities of adult prey Tetranychus urticae (Koch) was studied on leaf discs of Ricinus communis, at temperature 30±2ºC in laboratory. The predator consumed 4.04±0.79 adults/day, when prey density was 5 adults. The predator consumption increased with increasing prey density. At 50 preys the predator consumed 32.04±8.3 adults/day. Predation reached to 57.96±10.9 adults/day when prey density was 100 adults. So according Holling (1959) model of functional response, we put S. gilvifrons predator under the third type (type III). The increase of prey density caused increasing in egg numbers of predator. The predator female didn’t lay any eggs when prey density was 5 adults. The predator began laid eggs in few numbers 0.29±0.63 egg/day when fed on 10 prey adults/day, and these numbers of eggs laid by predator increased to 3.69±2.3 egg/day under prey density of 15 prey adult/day. the increase of egg numbers reached to 21.2±4.6 egg/day when prey density was 100 prey/day, so we noticed the predator oviposition increased with high prey density, and these increase caused by increase in predation efficiency and these lead to another kind of response called numerical response.

Key words: Tetranychus urticae, Stethorus gilvifrons, Functional response, Numerical response.

Full paper in Arabic:

الاستجابة الوظيفية والعددية للمفترس Stethorus gilvifrons عند تغذيته على كثافات مختلفة من بالغات الأكاروس العنكبوتي ذي البقعتين Tetranychus urticae مخبرياً.