Accession Number : AD0770367

Title :   Nonherbicidal Defoliants. III. Defoliation Responses of Woody Seedlings and Branches to Endothall/Ethephon.

Descriptive Note : Technical rept. May 71-Nov 72,


Personal Author(s) : Sterrett,John P. ; Leather,Gerald R. ; Tozer,William E.

Report Date : NOV 1973

Pagination or Media Count : 16

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)

Descriptors :   *Defoliants, *Plants(Botany), Defoliation, Carboxylic acids, Halogenated hydrocarbons, Phosphonic acids

Subject Categories : Agronomy, Horticulture and Aquiculture

Distribution Statement : APPROVED FOR PUBLIC RELEASE