Influence of Superior Oil Sprays on Growth and Bark Necrosis of ‘Delicious’ Apple Trees1

in HortScience
Authors:
H. E. WaveUniversity of Maine, Orono

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W. C. StilesUniversity of Maine, Orono

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Abstract

Formulations of superior oil applied to the developing buds and bark of ‘Delicious’ apple trees in the greenhouse inhibited bud break and growth. Bud break was significantly affected by oil concn, viscosity, and unsulfonated residue (UR). Total fresh wt of shoots was adversely affected by increasing concn and decreasing UR. Severity of bark injury increased with decreasing viscosities and increasing concn.

Contributor Notes

Received for publication December 13, 1971.

Department of Plant & Soil Sciences.

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