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Innovative Approach for the Use of Huwa-San TR50 in Controlling Two Spotted Spider Mite Tetranychus urticae Koch (Acari: Tetranychidae)

Innovative Approach for the Use of Huwa-San TR50 in Controlling Two Spotted Spider Mite Tetranychus urticae Koch (Acari: Tetranychidae)

Saleh S. Alhewairini1,* and Mahmoud M. Al-Azzazy1,2

1Department of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, P.O. Box 6622, Buraidah 51452, Al-Qassim, Saudi Arabia
2Agricultural Zoology and Nematology Department, Faculty of Agriculture, Al Azhar University, Cairo, Egypt

*      Corresponding author: hoierieny@qu.edu.sa

Fig. 1.

Comparison of the average effects of Huwa-San TR50 on the mortality of two spotted spider mite, (T. urticae Koch) and the predatory mite (N. cucumeris Oudemans) after one week of exposure, expressed as a percentage of the control mortality in well water. Each point is the mean ± SEM of 4 replicates, but in most cases, the error bars are smaller than the symbols used. The lines were fitted using a non-linear regression (log (inhibitor) vs. normalized response- variable slope) in Graphpad Prism 7 with the maximum plateau being 100% and the minimum being 0%. The IC50 values are listed in Table III.

Fig. 2.

A, a non-treated adult and eggs of two spotted spider mite, T. urticae Koch (control); B, the cuticle damage of the treated T. urticae with 3000 ppm of Huwa-San TR50; C, treated and non-affected predatory mite, N. cucumeris Oudemans with 3000 ppm of Huwa-San TR50; D, non-hatching of eggs of T. urticae as compared with non-treated T. urticae (control).

Corrected (%)

Pakistan Journal of Zoology

June

Vol. 50, Iss. 3, Pages 799-1198

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