Effect of some phenolic compounds on sporulation and growth of Pyricularia spp

Abstract

Sporulation of Pyricularia isolates were generally depressed by most of the phenolic compounds under the experimental conditions. However, many of the compounds tended to induce conidial formation in the otherwise non-sporulating isolate from B. mutica. Caffeic acid and guaiacol for the isolate from O. sativa, coumarin for the isolate from E. coracana and cinnamic acid for the isolate from P. repens were stimulatory for sporulation. As judged by their growth response, the isolates from O. sativa and B. mutica tolerated a wider variety of phenols than the isolates from L. hexandra and P. repens. The isolates from E. coracana and S. italica showed an intermediate response.