Systemic Activity of Iprodione in Poa annua and Postinfection Activity for Drechslera sorokiniana Leaf Spot Management. T. K. Danneberger, Graduate Research Assistant, Department of Botany and Plant Pathology and Pesticide Research Center, Michigan State University, East Lansing 48824. J. M. Vargas, Jr., Professor, Department of Botany and Plant Pathology and Pesticide Research Center, Michigan State University, East Lansing 48824. Plant Dis. 66:914-915. Accepted for publication 1 February 1982. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-914.

Iprodione is an effective fungicide for the control of Drechslera leaf spot of Poa annua. Drechslera sorokiniana conidia germinated in vitro in the presence of iprodione, but they proceeded to swell and burst. Iprodione was translocated basipetally and acropetally in P. annua but moved more efficiently basipetally. Iprodione controlled Drechslera leaf spot for 16 days and had eradicant action when applied within 48 hr of initial infection.

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