Spider mite hatching inhibitor

Table IV. Ranking of Formamidines in Order of Their Decreasing Potencies as Inhibitors of Twospotted Spider Mite Egg Hatch at Seventy-two Hours Posttreatment3...

With regard to reproduction, demethylchlordimeform was more active than chlordimeform in decreasing fecundity and egg hatch in spider mites 4-chloro-2-methylaniline also possessed some activity against egg hatch only, while the formanilide was inactive ( 9). Thus it seemed that with chlordimeform the demethyl metabolite played a major role in its effects on spider mite reproduction. However, the results with amitraz and U-44193 were more difficult to interpret. Their common metabolites, BTS-27271, 2,4-dimethylformanilide, and 2,4-dimethylaniline all significantly decreased fecundity and egg hatch, yet U-44193 was one of the most active inhibitors of these processes in mites, and amitraz had no significant effect. Examination of metabolism data (28) revealed that in twospotted spider mites exposed to U-44193 or amitraz, levels of parent compounds were low (<1.0%), but levels of BTS-27271 were several fold higher in mites exposed to... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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