Rainfall and Frequency of Ferbam Sprays Important for Fusiform Rust Control
Slash pine seedlings were exposed to 0, ¼, ½, 1, or 2 inches of artificial rain 2, 24, 48, or 96 hours after a ferbam spray was applied at the rate of 200 gallons per acre. All seedlings were artifically inoculated with basidiospores of Cronartium quercuum f. sp. fusiforme two to three hours after the rain. Results indicate that ferbam should be applied every second day after ¼ to ½ inch of rain, every day if more than ½ inch of rain occurs within 24 hours after ferbam application, and every third day if there is no rain. Ferbam sprays need not be reapplied on the same day, even after 2 inches of rain, but it is important to respray seedlings the next day.
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Document Type: Journal Article
Affiliations: Southeastern Forest Experiment Station, USDA Forest Service, Asheville, North Carolina
Publication date: 1979-11-01
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