Nonherbicidal Defoliants. II. Volume and Leaf Surface Studies with Endothall/Ethephon.
Technical rept. May-Oct 72,
EDGEWOOD ARSENAL ABERDEEN PROVING GROUND MD
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Experiments were designed to determine if the combination of 7-oxabicyclo2,2,1heptane-2,3-dicarboxylic acid endothall and 2-chloroethyl phosphonic acid ethephon, a nonherbicidal defoliant, applied at volumes less than runoff would effectively defoliate bean Phaseolus vulgaris L. cv. Red Kidney and white ash Fraxinus americana L. seedlings and to compare the abscission response of bean and ash to lower and upper leaf surface treatments of endothallethephon. Defoliation of bean and ash from endothallethephon volumes of one-half or one-quarter runoff was as effective as runoff. Lower leaf surface treatments on bean caused significantly more leaf drop than upper surface treatments and, although leaf abscission of white ash was no different from lower surface treatments than upper, it occurred faster. Author
- Agronomy, Horticulture and Aquiculture
- Chemical, Biological and Radiological Warfare