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Arboriculture & Urban Forestry Online
Volume 17, Issue 8 — August 1991

Phytotoxicity of Sunspray Ultra-Fine Spray Oil and Safer Insecticidal Concentrate Soap on Selected Ornamental Plants in Summer in North Florida and South Georgia    (View PDF)

Russell F. Mizell, III

Abstract: Two percent Sunspray Ultra-fine SprayR oil and Safer Insecticidal ConcentrateR soap were applied 5 times in separate treatments to 30 species of trees and shrubs growing in containers under commercial nursery conditions in north Florida. A similar test was conducted on 17 species of container-grown ornamentals in south Georgia. Horticultural oil and soap were applied at 10 day intervals beginning July 16, 1990. Plants were visually rated for phytotoxicity prior to the second through fifth application and 10 days after the fifth application. A third test of only thre* applications of horticultural oil or soap on 9 species of plants was conducted at Monticello, Florida beginning August 28, 1990. All the treatments were applied from 9:30 - 11:00 A.M. and daily temperatures were above 35 each day. No phytotoxicity was observed on any of the plants tested.


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