BIO-EFFICACY ASSESSMENT OF SAGE, SALVIA OFFICINALIS L. EXTRACTS ON SOME BIOLOGICAL ASPECTS OF SPIDER MITE, TETRANYCHUS URTICAE KOCH (ACARI:TETRANYCHIDAE) | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 5, Volume 94, Issue 3, September 2016, Page 633-644 PDF (609.86 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2016.152679 | ||||
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| Author | ||||
| DALIA A. WAKED | ||||
| Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt. | ||||
| Abstract | ||||
| The usage of plant extracts for pest control is considered as an alternative control method to synthetic pesticides. The effect of methanol and water extracts obtained from Sage (Salvia officinalis L.) plant from the Lamiaceae family on Tetranychus urticae Koch was evaluated. The sprayed leaf disk method was used to determine the effect of the plant extracts. The effect of Sage extracts on the eggs and adult females was examined. Four concentrations of the plant extracts 5%, 10%, 15% and 20% were evaluated. Mortality was observed after 1st, 3rd and 5th days from treatment. The highest death rates of T. urticae adults were found at 20% concentration as 92.85% and 87.14% for methanol and water Sage extracts, respectively. Both extracts gave poor toxic effect to eggs compared with adult females. Both extracts proved superiority in repellency to spider mite, T. urticae. Rate of repellency was decreased gradually by time elapsed after treatment. T. urticae females preferred to settle, deposit eggs and feed on the untreated half of the disc and the majority refused to settle on the treated part especially with the high concentrations. Both solvent extracts shortened the longevity and reduced fecundity of adult females of T. urticae. As a consequence, Sage extracts are thought to be used as an alternative safe method for mite control. | ||||
| Keywords | ||||
| Sage; Salvia officinalis; Tetranychus urticae; Toxicity; Repellency | ||||
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