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  • Author or Editor: M. H. Hollingsworth x
  • HortScience x
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Abstract

Naphthaleneacetic acid ethyl ester (NAA-ethyl ester) sprays applied to the base of apple (Malus domestica Borkh.) nursery stock for sprout control suppressed sprout development. Rates of 0.25, 0.50, and 1% resulted in significantly less sprout development than the 0.125% rate. Sprout length was suppressed only by the second applications of the 0.25, 0.50, and 1% rates. A second application of the 0.50 and 1% rates killed the existing sprouts at time of application. Trees treated with 1% NAA-ethyl ester were shorter and smaller in diameter. The 0.25 and 0.50% rates were equally as effective in sprout control as the 1% rate, without adversely affecting tree height and diameter.

Open Access