Benomyl and acephate applications increase survival of sugar maple seedlings during their first growing season in northern Pennsylvania
1994
Stanosz, G.R. (University of Wisconsin, Madison, WI.)
A study was conducted to determine the contributions of pathogenic fungi and insects to the mortality of sugar maple (Acer saccharum Marsh.) seedlings during their first season of growth. Replicated plots were located in four northern Pennsylvania stands in which the anthracnose pathogen, Discula campestris (Pass.) von Arx, and the pear thrips, Taeniothrips inconsequens (Uzel), were associated with sugar maple seedlings. Survival was quantified for new seedlings treated with water (control), the systemic fungicide benomyl, the systemic insecticide acephate, or both, during May through August 1990. Treatment affected mean survival (p 0.001), which was approximately 2-3 times higher in plots treated with benomyl and acephate than in plots treated with water only. Treatment with the fungicide, insecticide, or both also generally increased the percentage of seedlings bearing leaves (p 0.001), the number of leaves per seedling bearing leaves (p 0.001), shoot weight (p
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