Laboratory and Semi Field Evaluation of Garlic Aqueous Extract as Acaricide Against Two Tetranychid Mites (Acari: Tetranychidae) | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 1, Volume 7, Issue 10, October 2016, Page 623-628 PDF (293.25 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2016.52085 | ||||
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| Authors | ||||
| Mariam G. Habashy1; Hala H. Al-Akhdar1; Doaa M. Boraie2; Zeinab E. Ghareeb3 | ||||
| 1Crops and Cotton Mites Department, Plant Protec. Res. Institute, Agric. Res. Center, Giza, Egypt. | ||||
| 2Stored Products and Grains Department, Plant Protec. Res. Institute, Agric. Res. Center, Giza, Egypt. | ||||
| 3Central Lab.For Design and Stat. Anal. Res., Agric. Res. Center, Giza. Egypt. | ||||
| Abstract | ||||
| The two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), and the carmine spider mite, Tetranychus cinnabarinus (Boisduval), are two of the most important mite pests of different host plants in Egypt. These mites are spreading rapidly because of their resistance to acaricides; therefore, it was necessary to develop a new biological control tactics for mite management. Plant extracts, such as garlic extract (Allium sativum Linn.), may represent easy, available and viable alternative, because they are considered to be minimum-risk pesticides. A series of laboratory and semi-field experiments were considered to determine the susceptibility of adult mite females to different concentrations of garlic aqueous extract (G.A.E.). Mortality was measured upon treatment with five concentrations ranging from 1 to 25% W/V. Female mortality increased with concentration, T. urticae was more tolerant than T. cinnabarinus through laboratory studies as maximum mortality values were 90% and 100% after 24 hours using concentration 25% W/V, respectively. The chemical composition of the Allium sativum aqueous extract was characterized by GC/MS analysis which revealed the occurrence of 33 compounds, of which the major compound was identified as 2- Furancarboxaldehyde,5-(hydroxymethyl). The efficacy of G.A.E. was evaluated against T. urticae and T. cinnabarinus under semi-field conditions. Highest reduction (89.75 %) in T. urticae population was recorded by using concentration 50% W/V one day after treatment (DAT). T. cinnabarinus was more tolerant under the semi-field conditions as the reduction was (80.14 %) using the same concentration. G.A.E. is effective in the control of both tetranychids. It is promising candidates for biological control of these two mite pests. | ||||
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