The effect of time between preparation and use on the activity of benomyl and thiophanate methyl dips against Sclerotinia fructicola

Abstract

A study was undertaken on the relation between the age of the suspension and the effectiveness of two fungicides. Samples of two dessert varieties of peaches that had been artificially inoculated with spores of the brown rot fungus Sclerotinia fructicola (Wint.) Rehm were dipped in suspensions of thiophanate methyl (400, 800, and 1,600 p.p.m.) and benomyl (75, 150, and 300 p.p.m.) on the day the dips were mixed and four and eight days later. Brown rot decreased markedly with increase in the period of standing of the fungicidal dip after preparation, and with increase in concentration of both fungicides. Benomyl was the more effective.