Thio-urea derivatives and isothio-urea derivatives, process for their preparation, compositions containing these compounds and their use in combating pests

摘要

compounds of the formulae i and ii.wherein r1, r2 and r3 each independently hydrogen, c1 - c4 - alkyl, methoxy, nitro, halogen, trifluormethyl or hydrogen or methyl, r4, r.c1 - c3 alkyl, and r6 c1 -