Abstract
Abstract Rust, Coleosporium asterum, of China aster, Callistephus chinensis, is a serious problem on plants grown for cut flowers in California. Control of the rust resulted from 3 applications of fungicides at 3-week intervals. Funginex® (triforine) gave the best control. Bayleton® (triadimefon) and Fore® (mancozeb) gave good control. Plantvax® (oxycarboxin) and Physan® (a quanternary ammonium chloride compound) failed to control the fungus satisfactorily. The use of the binomial Coleosporium asterum, formerly called C. solidaginis, is questioned.
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