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Cyproconazole for Control of Fusiform Rust on Loblolly Pine Seedlings

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The efficacy of cyproconazole seed treatments and foliar sprays for control of fusiform rust on loblolly pine seedlings was evaluated in greenhouse and nursery trials. At the nursery, the percentage of untreated seedlings that were galled at lifting was high (54%). No seedlings receiving cyproconazole at the lowest dosage foliar spray (4 sprays at 123.25 g ai/ha/application ) without the seed treatment, and only 0.1% of seedlings receiving only the seed treatment (1.25 g ai/kg seed), were galled Laboratory inoculations indicated that seed treatments with cyproconazole at 1.25 and 2.5 g ai/kg seed were effective for at least 20 and 30 days, respectively, and that foliar sprays of 185.0 or 246.5 g ai/ha were effective for 14 but not 21 days. Eleven months after sowing, mycorrhizal development in the nursery was similar among seedlings receiving approximately equal dosages of either cyproconazole or triadimefon. Seedling growth was not significantly different between control seedlings and those receiving the various dosages of cyproconazole. South J. Appl. For. 18(3): 101-104.

Document Type: Journal Article

Affiliations: School of Forestry, 108 M. White Smith Hall, Alabama Agricultural Experiment Station, Auburn University, AL 36849-5418

Publication date: August 1, 1994

More about this publication?
  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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