Biological Activity of the Organic Pesticide Baicao No. 1 Against the Red Spider Mite Tetranychus urlicae Koch | ||||
| Acarines: Journal of the Egyptian Society of Acarology | ||||
| Article 8, Volume 6, Issue 1, 2012, Page 35-39 PDF (3.44 MB) | ||||
| Document Type: Original research articles | ||||
| DOI: 10.21608/ajesa.2012.163624 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| E. M. Bakr1; Z. R. Soliman2; M. F. Hassan2; S. D. Tawadrous1 | ||||
| 1Plant Protection Research Institute, Agric. Research Center, Egypt | ||||
| 2Agric. Zoology Dept., Faculty of Agric., Cairo Univ. Egypt. | ||||
| Abstract | ||||
| The efficiency of the organic pesticide "Baicao No. 1" (active ingredient matrine) was studied against the different stages of the red spider mite Tetranychus urticae Koch. It showed high efficacy against mite adult female as its LC50 values were 1.14 and 0.08 ppm when mortality was observed after one and four days, respectively. Less efficacy was observed against protonymphs, as the LC50 value averaged 26.14 ppm. Slight ovicidal efficacy was recorded on egg hatchability, as LC50 value was 168.25 ppm; while further high mortality was observed in hatched larvae which was reflected in a reduction in LC50 value to 8.03 ppm. Applying LC50 concentration (21.07 ppm) on protonymphs resulted in some changes in biological aspects of the survived mites which reduced finite rate of increase from 1.33 to 1.20 female per female per day. Matrine also showed antifeedant effect; as shrinkage in feeding area was recorded when mites fed on treated leaves. | ||||
| Keywords | ||||
| Tetranychus urticae; Matrine | ||||
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