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Symptomless Effects of Experimental Fungicides on Wheat. D. Prusky, Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot, Israel; A. Dinoor(2), and Y. Eshel(3). (2)(3)Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot, Israel. Phytopathology 64:812-813. Accepted for publication 28 December 1973. DOI: 10.1094/Phyto-64-812.

The experimental systemic rust fungicide, Hoe-6052, was previously found to reduce the yield of a wheat stem rust-resistant cultivar, and not to increase the yield of a susceptible cultivar, even though it controlled the rust. This compound, as well as EL-273 affected the respiration of the wheat cultivar F.A. 8193, while the experimental fungicide BAS-3050 F did not. Hoe-6052 also affected the photosynthesis of wheat quite appreciably, while EL-273 and BAS-3050 F did not. It is suggested that tests like those of photosynthesis and respiration be included at an early stage of development of fungicides.

Additional keywords: photosynthesis, deleterious effects of fungicides.