Evaluation of DursbanR and Dowco 214 as mosquito larvicides in rice-fields
Yap, H.H.; Ho, S.C.
Southeast Asian Journal of Tropical Medicine and Public Health 8(1): 63-70
1977
ISSN/ISBN: 0125-1562 PMID: 70078 Document Number: 123568
Emulsifiable concentrates of Dursban (chlorpyrifos) and Dowco 214 (chlorpyrifosmethyl) were tested as mosquito larvicides using Hudson knapsack sprayers on small plots of rice fields on Penang Island [Malaysia]. The mosquitoes found in these rice fields are predominantly Anopheles campestris and Culex tritaeniorhynchus. At dosages of 14, 28 and 56 gm/ha, Dursban is effective in maintaining the rice fields free of Anopheles larvae for at least 2,3 and 7 days, respectively. Dowco 214 at 56 gm/ha is able to keep the fields free of all mosquito larvae for at least 2 days.