Formulation as a factor affecting the chemical activity of insecticides against Sitophilus oryzae (l.) (Coleoptera: Curculionidae) | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 4, Issue 1, June 1992, Pages 97-114 PDF (5 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.1992.462138 | ||
| Authors | ||
| E. H. Tayeb* ; Magda B. El-Kady; A. S. A. Saad | ||
| Dept. of Plant Protection, Faculty of Agriculture, Saba-Basha, Alexandria University. | ||
| Abstract | ||
| Tests were made to determine the toxicity of four inert dusts (talc, kaolin, silica gel and ash) and three selected pesticides (malathion, pirimiphos–methyl and cypermethrin) formulated as 0.1% dust formulation, based on the different inert dusts and applied to wheat grain (14.4% moisture content), against the rice weevil, Sitophilus oryzae (L.). The inert dusts were tested in different weights ranging between 0.10 and 4.00 mg/50 gm wheat to determine their insecticidal efficacy and their effect on the mean number of emerged progenies. In addition, the LC₅₀ values were calculated for each used pesticide based on different used inert dusts after 7 days of bioassay. The results show that silica gel and ash proved to be active against S. oryzae and their progeny. Moreover, the combination of ash/malathion, kaolin/pirimiphos–methyl and silica gel/cypermethrin showed sort of potential against S. oryzae and this finding could be attributed to less hazard to environment based on less amount of chemicals used in the control. | ||
|
Statistics Article View: 4 PDF Download: 1 |
||
