
%0 Journal Article
%A Anderson, CR 
%A Wicks, TJ 
%T Reduced control of powdery mildew (<I>Uncinula necator</I> Schw.) when sterol demethylation inhibiting fungicides are mixed with cupric hydroxide
%J Australian Journal of Experimental Agriculture
%D 1993/07/01
%V 33
%N 4
%P 503-505
%K fruit crops;temperate fruits;Plant diseases;plant pathogens;plant pathogenic fungi;chemical control;plant disease control;fungicides;Grapes;control;Myclobutanil;Triadimenol;Propiconazole;plant pathology;Uncinula necator;fungi;Vitis;Pathogens;pesticides;
%R https://doi.org/10.1071/EA9930503
%U https://www.publish.csiro.au/paper/EA9930503 
%X The efficacy of myclobutanil, triadimenol, and propiconazole was significantly reduced when recommended rates were mixed with cupric hydroxide and applied to control powdery mildew (Uncinula necator) on grape. In 6 field experiments conducted over 2 growing seasons and on 4 grape cultivars, the incidence and severity of powdery mildew on bunches increased following addition of copper to the sterol demethylation inhibiting fungicides. On Rhine Riesling, 4 applications of either 31.25 mg myclobutanil/L or 25 mg triadimenol/L controlled powdery mildew, whereas, 1.25 g cupric hydroxide/L with these fungicides resulted in 53 and 62% of bunches infected, respectively. 
