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Oil Properties

Botanical oils vary in availability and in composition. The most abundant botanical oil in the United States is soybean oil, thus most of our research has been with that oil. Researchers in Australia, Europe, India, and South America are researching the botanical oils available to them.
      Soybean oil is refined by several methods but the most common is by solvent extraction. Thus, botanical oil are not described with distillation ranges as are the petroleum oils. Soybean is available in crude, degummed, and refined forms. Most of our research has been with the degummed form because it more uniform than the crude oil and has been described as more stable in storage than refined oil.
      Soybean oil must be mixed with an adjuvant in order to mix in water. Most of our trials have used our TNsoy1 formulation (a mixture of soybean oil with Latron B-1956 spreader-sticker at 10 oil : 1 Latron (v/v)}). Various oil mixes in bottles after shake tests to examine emulsifier effectsIt is important to premix the oil and adjuvant at least 30 minutes prior to adding to the spray water. A premixed oil/adjuvant formulation is more effective than adding oil and adjuvant separately to the water in the spray tank.
     Wintertime sprays of TNsoy1 remain visible of twigs for several weeks. However, foliar sprays in the summer can be washed off by rain thus repeated sprays may be needed.
     The type of soybean oil in a formulation is one concern, however the adjuvant used with the oil is also important. The adjuvant will influence formulation stability; oil contact, coverage and retention on plant material; and phytotoxicity. We are evaluating various adjuvants to use with soybean oil.

Properties Gallery


Abstracts: (pdf files require the Adobe Acrobat plug-in)

Apple and peach leaf and stem surface morphology and soybean oil retention as influenced by simulated rainfall and soybean oil emulsions. pdf | html

Oil emulsions enhance transcuticular movement of captan into apple leaves. pdf | html

Wax morphology and gas exchange of peach and apple leaves as influenced by soybean oil emulsions and rain In: pdf | html



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