Various spray adjuvants were evaluated in 1985 and 1986 with iprodione (Rovral®) for improved control of Sclerotinia blight of peanut, caused by Sclerotinia minor (Jagger) Kohn. Treatments were applied three times on demand, using high-volume nozzles to deliver 335 L/ha or low-volume nozzles to deliver 140 L/ha. Acetic acid, Buffer P.S.®, Chem Wert Plus, hydrochloric acid, pinolene (Nu-Film-17®), SoyOil 937® and Spray-Aide were tested with iprodione in 1985, and ChemWett Plus®, pinolene and Spray-Aide were chosen for additional trials in 1986. Treatments of iprodione at 1.12 kg/ha with pinolene at 0.42% in low-volume sprays and 0.18% (vv) in high-volume sprays produced the greatest yield of peanut during both years. Additional testing of iprodione with pinolene used only high-volume sprays, and these treatments were applied on demand: three times in 1987 and twice in 1988, 1989 and 1990. Yield and value of peanut over the 6-yr period of high-volume treatments were increased significantly (P = 0.05) by iprodione with pinolene, compared to iprodione alone. The addition of pinolene increased the mean yield by 348 kg/ha and value of peanut by $291/ha. The cost of using pinolene as an adjuvant averaged $6.95ha each year. Disease incidence was 12% lower in plots treated with iprodione and pinolene, compared to iprodione alone, but this difference was not significant over the period.
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Keywords: Arachis hypogaea, Groundnut, Sclerotinia blight
How to Cite:
Smith, F. & Phipps, P. & Stipes, R.,
(1991) “Use of Pinolene or Other Spray Adjuvants with Iprodione for Improved Control of Sclerotinia Blight on Peanut¹”,
Peanut Science 18(2).
1This investigation was part of the senior author's doctoral research program. Pinolene is a registered trademark of Miller Chemical and Fertilizer Corporation. Use of trade names implies neither endorsement of the products by Virginia Polytechnic Institute and State University nor criticism of similar ones not mentioned.