Incidence of currant borer moth, Synanthedon tipuliformis, in blackcurrants in Tasmania

Abstract

The incidence of the currant borer moth, Synanthedon tipuliformis (Clerck), in blackcurrant plantations in southern Tasmania was assessed by a survey in 1973. On individual properties the mean larval density ranged from nil to 1.1 larvae m-1 of branch, but on most properties the larval density was considerably less than the overall mean of 0.21 larvae m-1. The survey suggested that the incidence of the moth was highest in a more inland district and in flat and north facing blocks; further, incidence increased with decreasing altitude.