Nonherbicidal Defoliants. III. Defoliation Responses of Woody Seedlings and Branches to Endothall/Ethephon.
Abstract
The study was conducted to determine the dose range of 7-oxabicyclo (2,2,1)heptane-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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1973
- Accession Number
- AD0770367
Entities
People
- Gerald R. Leather
- John P. Sterrett
- William E. Tozer