Efficacy of Certain Insecticides for Controlling the Two Spotted Spider Mite, Tetranychus urticae (Koch) and Determination Residues of Abamectin on Some Quality Parameters of Cucumber Fruits | ||||
| Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control | ||||
| Article 18, Volume 12, Issue 1, June 2020, Page 217-226 PDF (597.96 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsf.2020.223092 | ||||
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| Author | ||||
| Rehab E.M.E. Salem | ||||
| Plant Prot. Dept., Fac. Agric., Zagazig Univ., Egypt | ||||
| Abstract | ||||
| Field trials were conducted in El- Salhia, Sharkia governorate, to assess the effectiveness of insecticides (imidaclopride, lambda-cyhalothrin, and abamectin) against the two-spotted spider mite, Tetranychus urticae, on cucumber crops. The trial used a randomised complete block design (RCBD) with three treatments: T1: abamectin, T2: lambda-cyhalothrin, T3: imidaclopride, and control, which was repeated three times. At varied harvest intervals of (2h), 1, 3, 5, 7, 9-, 11-, 13-, and 15-days following insecticide applications, residues and abamectin dissipation were measured. The insecticide's persistence, dissipation, half-life value, and safe harvest interval in cucumber were estimated. Additionally, the effects of abamectin residues on various quality indices (total soluble sugars, glucose, acidity, total soluble solids, ascorbic acid, -carotene, dry matter, and protein) were assessed in the last three samples (7 and 15 days after applications). The results revealed that all the treatments reduced the two-spotted spider populations. Furthermore, the results showed that the treatments sprayed with abamectin gave the highest reduction percentage (96.32%), followed by lambda-cyhalothrin (92.22%) and imidaclopride (76.93%). The half-life (t12) values in cucumber fruits were 2.99 days, and the loss percentages of initial deposits in cucumber fruits were 8.96 mg/ kg. In conclusion, we encourage farmers to use abamectin according to the Ministry of Agriculture recommendation in combating T. urticae, in integrated pest management, as cucumbers can be safely consumed after 7 days of abamectin treatment. | ||||
| Keywords | ||||
| Two-spotted spider mite; Tetranychus urticae; acaricide; abamectin; imidaclopride; cucumber; Cucumis sativus | ||||
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