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2005, USA, Soysoap 100" Bacteria Spot and Rust on Peaches!"

Last year you sent us 6 gallons of product to test on peach for summer leaf diseases. Two organisms, bacterial spot and rust, are responsible for premature defoliation of peaches in Florida. In an observational trial the product was compared with a spray of 23 g of Cuperfix, 16 oz of the surfactant Preference and 200 ml of Take Down (Phosphoric acid to adjust pH to 5.8) in 200 gallons of water. These materials were used for control of bacterial spot. Cabrio along with Preference and Take Down, alternated with Bravo Weather Stick and Take Down were the products used to control rust. Trees were sprayed using 500 gpa in a John Bean (FMC) sprayer at 500 psi. They were sprayed with a hand-gun to drip and coverage was as good as possible, although the spray could not totally penetrate the interior canopy. Spray times for bacterial spot started in early June after summer pruning and continued every 3 weeks ending in October. Sprays for rust were determined by observation and generally occurred every 4 weeks. Every time these sprays were applied we also applied your product sprayed at a 1/4% rate with a pH adjustment as described earlier. In spite of the two hurricanes all trees in the trial held their leaves until December at which time they were defoliated with zinc sulfate.

In observation only the your product seemed to be as effective as the others. We are continuing this same study this year on an observational trial as the planting is being for a yield and quality study. However this study will be over in 05. In 06 I would like to due a replicated trial with these products and measure leaf retention, fruit quality and yields. I would like to compare the your product against the others.

Would you please replenish our supply of trialproduct as I used the last I had today.

University of Florida

Dept. of Horticultural Sciences

Gainesville FL 32611