Persistence of benomyl and thiophanate compounds in soil and various plants following soil application

Abstract

Control ofSclerotinia sclerotiorum in muskmelons was obtained by a single soil drench with benomyl. The material was found in the apical parts of the plant and in the soil until the end of the growing season. Benomyl [methyl l-(butylcarbamoyl)-2-benzi-midazolecarbamate] and thiophanate methyl-NF 44 [1.2- bis (3 methoxycarbonyl-2-thioureido) benzene], applied to seedbeds, were taken up by and then persisted in tomato, pepper and eggplant for approximately 8 weeks after application. Thiophanate-NF 35 [1.2-bis (ethoxycarbonyl-2-thioureido) benzene] could be detected only in the bottom leaves of pepper and eggplant, for up to 4 weeks after application.