Abstract

In a study on chemical control of sorghum downy mildew incited by Peronosclerospora sorghi (Weston and Uppal) Shaw, none of the tested fungicides were effective, as a dry seed treatment, against conidial and oosporic infections of the pathogen. In contrast, soaking of seeds with aureofungin 67 ppm a.i. (Aureofungin-sol 30% W/W), metalaxy1 0.2% a.i. (Apron 35 WS) metalaxy1-Ziram 0.2% a.i. (Ridomil ZM, 280 FW) and carboxin 0.1% a.i. (Vitavax 75 WP) for 2 hr effected complete control of the disease. But, metalaxyl, metalaxyl-Ziram, carboxin and not aureofungin significantly inhibited the germination of seeds. According to this study, aureofungin is superior to other selected fungicides from the standpoint of downy mildew control and seed germination. The result was confirmed by a repeated experiment.

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