Nonherbicidal Defoliants. III. Defoliation Responses of Woody Seedlings and Branches to Endothall/Ethephon.
Technical rept. May 71-Nov 72,
EDGEWOOD ARSENAL ABERDEEN PROVING GROUND MD
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The study was conducted to determine the dose range of 7-oxabicyclo 2,2,1heptane-2,3-dicarboxylic acid endothall and 2-chloroethyl phosphonic acid ethephon which would promote abscission of actively-growing greenhouse woody seedlings in greenhouse tests and the response of branches of field-grown trees to endothall and ethephon during several stages of growth. Defoliation was dependent upon species, chemical dose, and stage of plant development. Various mixtures of endothall and ethephon were effective in obtaining from 75 to 100 defoliation within two weeks without damage. Abscission was more consistently achieved after the trees had completed their main flush of growth. Author
- Agronomy, Horticulture and Aquiculture