Phytotoxic Effects of Copper Fungicides on Acid Soils

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Date
1958
Authors
Gibson I. A. S.
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Abstract
Some limited experiments have indicated that toxic reactions of pine seedlings to cuprous oxide fungicides, when growing in acid soils, may be due to copper liberated in the soil solution. Cuprous oxide fungicides ("Perenox", "Cuprocide"), tend to be deposited near the surface of the acid soil and toxic copper may accumulate in the region of the germinating seed. There is some evidence that old stocks of these fungicides are more likely to give toxic effects than fresher supplies. Similar toxic effects might conceivably arise from the interaction between acid soils and other metallic fungicides.
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East African Agricultural And Forestry Journal, XXIV (No. 2), p. 125-132