Chemical control of paddy moth, Sitotroga cerealella (Oliv.) infesting paddy, stored in bags
1970
Rai, B.K. | Croal, K. (Ministry of Nat'l Dev. and Agric. (Guyana). Res. Div.)
9 insecticides of low mammalian toxicity were tested for their duration of effectiveness on jute sacking, up to 3 months, against the adult moth in laboratory. Knock-down time, 50 values of the more effective insecticides, phoxim, pirimiphosmethyl (2-Diethylamino-6-methyl pyrimidin-4-yl dimethyl phosphorothionate), iodphenfos (0,0-dimethyl-0-2, 5-dichloro-4-iodophenyl thiophosphate) and lindane were 27, 53, 102 and 107 minutes respectively at 0.1 % concentration. In view of these results, phoxim and pirimiphos methyl were considered of importance for control of the moth. In bond tests, application of 0.25 % phoxim emulsion at 150 mg a.i./sq m of exposed surface area of stacks of bagged paddy, controlled as well as prevented infestation by the moth, for up to 6 months. Data on duration of toxicity of 9 insecticides on jute sacking to adults of Rhizopertha dominica (Fab.) and Tribolium castaneum (Herbst) are presented
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