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KMID : 0903619820230030208
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Journal of the Korean Society for Horticultural Science
1982 Volume.23 No. 3 p.208 ~ p.213
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Studies on Factors Influencing Phytotoxicity Expression in Several Vegetable Crops Sprayed with Dithane (Zine Complex Manganese Ethylene - bis - dithiocarbamate) Fungicides
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Abstract
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Phytotoxicity caused by Tanzeo M-45 was influenced by the year the chemicals produced. Dithane M-45 produced in 1980 and 1981, however, consistently showed little or no injury. adjusting the colution acidity to pH 8.0 with 20% NaOH greatly increased phytotoxicity and sprays with aged solutions also increased phytotoxicity. Early morning spray and irrigation shortly before or after chemical spray significantly increased phytotoxicity. the soil media around the stem base greatly influenced phytotoxicity. Severe injury was found in the seedlings of which the stem base was covered with field soil whereas slight or no injury was found in the seedlings covered with fine sand, vermiculite, perlite, or peatmess. Tanzeo M-45 sprays on injured leaves of muskmelon caused moderate injury on the leaf blade whereas no such injury was found in the seedlings sprayed with Dithane M-45.
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