Fosthiazate for Suppression of Pratylenchus penetrans in Potato on Prince Edward Island
Abstract
The impacts of fosthiazate on potato (Solanum tuberosum) tuber yields and populations of root lesion nematodes (primarily Pratylenchus penetrans) were studied during 1991-1994 in experimental plots on Prince Edward Island. Tuber yields were greater in treated plots when compared to untreated plots by 8% and 30% during 1991 and 1993, respectively. Numbers of nematodes in roots were reduced by the treatments in every year, and nematode populations in soil were suppressed in 1991, 1993, and 1994. Tuber yields in 1993 and 1994 were higher, and nematode counts in soil and roots in 1991, 1993, and 1994 were lower in plots treated with the emulsifiable concentrate formulations of fosthiazate than in plots treated with the granular formulations. Yields of plots treated with fosthiazate did not differ consistently from yields of plots treated with aldicarb. The results indicated that fosthiazate should be useful for potato production in the Maritime region of Canada. Key words: aldicarb, fosthiazate, management, nematode, potato, Pratylenchus penetrans.Downloads
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