. Controlling peach insects in Illinois [by] S. C. Chandler [and] W. P. Flint. Insect pests; Peach. 4 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 33 In recent years several tar distillate oils containing a fungi- cide have been put on the market. The fungicide has cresylic acid or similar material as a base. In our tests to date these oils used at 5 per cent strength show excellent kill of scale. According. / i Fig. 3.—Mixing spray material by the injector method. to Dr. H. W. Anderson of the University of Illinois Department of Horticulture, the oils give almost complete control of leaf curl. As
. Controlling peach insects in Illinois [by] S. C. Chandler [and] W. P. Flint. Insect pests; Peach. 4 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 33 In recent years several tar distillate oils containing a fungi- cide have been put on the market. The fungicide has cresylic acid or similar material as a base. In our tests to date these oils used at 5 per cent strength show excellent kill of scale. According. / i Fig. 3.—Mixing spray material by the injector method. to Dr. H. W. Anderson of the University of Illinois Department of Horticulture, the oils give almost complete control of leaf curl. As yet they are much more expensive than oil emulsion plus Bordeaux. The use of DN (2, 4 dinitro 6 cyclohexylphenol or dinitro- ortho-cyclohexylphenol) in petroleum oil solutions has been sug- gested and tested in a number of states. Tests with this material were made in 1937. They showed that the petroleum oil solution with DN (4 per cent) used as dormant sprays for control of San Jose scale was effective to such an extent that 1 per cent of oil with DN produced a kill equal to that produced by 2 or 2io per cent of oil without DN. In one of two orchards the oil with DN resulted in such a killing back of the bud-bearing wood that much of the crop was lost. Light injury occurred in the other orchard. Tests are in progress to determine the fungicidal value of DN for control of leaf curl. In 1939 no injury resulted from applications at l';', per cent strength. I. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Chandler, Stewart Curtis, 1889-; Flint, W. P. (Wesley Pillsbury), 1882-1943. Urbana
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