Synergistic Effect Between Vapors of C-8514/Schering 36268 and Dichlorvos Against the Carmine Spider Mite1
Author: DITTRICH, VOLKER
Source: Journal of Economic Entomology, Volume 59, Number 4, August 1966 , pp. 893-896(4)
Publisher: Entomological Society of America
Abstract:Adult females of Tetranychus telarius (L.), the carmine spider mite, were exposed to sturated atmospheres of C-8514/Schering 36268 (N-(2-methy-4-chlorophenyl)-N'N' dimethyformamidine), and dichlorvos for certain time increments. A dosage-mortality relationship between percentages kill and exposure time was established. The LT50 for adults was 28 seconds for dichlorvos, and 4 hours 8 minutes for C-8514. Taking into account the saturation concentrations (dichlorvos 145 mg per m3; C-8514 4 mg per m3) the LT50 showed a ratio of 1:15 (adults) in favor of dichlorvos. With mite eggs the situation was reversed: C-8514 has a higher killing potential than dichlorvos. When adult females were exposed successively to the 2 toxicants in the vapor phase, the mortality was more than twice as high as could be expected from addition of mortality values after corresponding time exposures in each of the 2 vapor phases. This synergistic relationship was observed whether samples were first exposed to dichlorvos and then to C-8514, or vice versa. C-8514 is very well qualified for greenhouse applications against spider mites. Together with dichlorvos it can be successfully applied in vaporized form against most arthropod pests in cultures under glass.
Document Type: Research Article
Publication date: August 1, 1966
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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