| abstract |
Novel substituted isonicotinic acid esters of the general formula <IMAGE> in which Y is halogen; X is oxygen or sulfur; Q is C1-C3alkylene, propenylene, C1-C3alkylene mono- or di-substituted by R, or propenylene mono- or di-substituted by R; R is C1-C4alkyl, C1-C4haloalkyl having from 1 to 3 halogen atoms, cyano, C2-C5alkoxycarbonyl, C3-C6cycloalkyl, phenyl, or phenyl substituted by C1-C4alkyl, C1-C4alkoxy, halogen, trifluoromethyl, tricholoromethyl, nitro or by cyano, or benzoyl or benzoyl substituted by C1-C4alkyl, C1-C4alkoxy, trifluoromethyl, trichloromethyl, nitro or by cyano; A is phenyl, biphenyl, phenoxyphenyl, naphthyl, pyridyl, furyl, thienyl, imidazolyl or triazolyl, it being possible for each of these radicals to be unsubstituted or substituted by halogen, C1-C4alkyl, C1-C3alkoxy, C1-C3haloalkoxy having from 1 to 3 halogen atoms, trifluoromethyl, nitro or by cyano; with the proviso (1) that if A is imidazolyl or triazolyl R may not be phenyl or benzoyl, and (2) that A and the R substituent in Q may together contain no more than 3 rings. The novel active ingredients have plant-protecting properties and are suitable especially for the preventive protection of plants against attack by phytopathogenic microorganisms, such as fungi, bacteria and viruses. |