Toxicological Effects of Garlic Bulbs Aqueous Extract on Two Tetranychid Mites (Acari: Tetranychidae)

Abstract

Experiments were conducted in the laboratory to assess the ability and stability of garlic (Allium sativum Linn.) aqueous extract to control the two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), and the carmine spider mite, Tetranychus cinnabarinus (Boisduval) in Egypt. Natural plant extracts, as (Allium sativum Linn.), have minimum-risk to the environment, so they can considered as an easy alternative to pesticides. Seven concentrations ranging from 2000 to 40000 ppm garlic were used to measure extract toxicity. Data showed that the maximum mortality values were 83.33and 86.67 % after 7 days, for T. urticae, and T. cinnabarinus, respectively. The effect of storage periods on the efficacy of different six concentrations of aqueous garlic extract on the same mite species was studied. Results indicated that the extract acaricidal activity decreased throw time for all tested concentrations. After four weeks it lost about 30% of its activity. Garlic aqueous extract significantly reduced egg deposition and egg hatchability of T. urticae and T. cinnabarinus. Regarding mites' mortality and fecundity, there were no statistically significant differences between the two species. These experiments demonstrated that garlic aqueous extract is effective in the control of both tetranychid mite pests.

Efficacy of Some Pesticides and Plant Extracts on Two Spotted Spider Mite Tetranychus urticae, (Koch) on Cotton Plant

“…Spinosad-Flubendiamidenz; Profenofos-Q-720g and Profenofos" were more-effect to adult T. urticae, while "Chlorantrniliprole+Lambda-cyhalothrin; Amitraz; Profenofos; Profenofos-Q-720gl-1 and Paraffin-oil" were more-effect to motile-stages and egg-stages of T. urticae. Habashy, 2018, in Egypt, concluded that, max-mortality values was (83.33%), after 7-days on T. urtecae, when studied (ability and stability) of garlic-aqueous-extract Allium sativum linn. Khairia, et.…”

Field and Laboratory Study to Compare the Effect of some Compounds on Tetranychus urticae (Koch) and Tetranychus cucurbitacearum (Sayed) on Soybean Plants

“…after treatment application, followed by "azadirachtin, emamectin benzoate, spinosad and hexythizox" respectively. Habashy (2018), in Egypt, searched in the "ability" and "stability" of Allium sativum linn., aqueous-extract against two spotted spidermite, Tetranychus urticae. Data showed that the maximum mortality value was 83.33% after 7 days, for T. urtecae.…”

Efficiency Comparison of Two Acaricides, Mycetism Boletus satanas (Lenz) and Plant Extract (Eucalypts) Converted to Nano Particles Images on Tetranychus urticae (Koch) مقارنة الکفاءة لتأثیرمبیدین أکاروس ومستخلص فطری ونباتی وصورهم النانوتکنولوجیه على الأکاروس الاحمر ذو البقعتین

“…Also, the data indicated that cyhalothrin and abamectin were the highest effective compounds which decreased egg hatchability of T.urticae followed by ethion; black cumin extract was the least effective on egg hatchability. Habashy (2018) and Hosam et al, (2019) determined the direct and residual effects of some natural plant extracts to study its effects on the biological aspects of T.urticae. The results confirmed the effective influence of these extracts on mite life aspects, which altered and prolonged the mite life cycle, and that reduced the number of generation /year.…”