Abstract
Plants developed typical ethylene injury symptoms when fumigated for 21 to 48 hours with ethylene or various combinations of ethylene, acetylene, propylene and nitrogen dioxide. When propylene and nitrogen dioxide were included in the gas mixture and the mixture was irradiated typical oxidant symptoms were recorded. From reported oxidant injury symptoms the propylene-nitrogen dioxide irradiated mixture produced plant injury which is typical of both ozone and PAN. A ratio of one ppm NO/sub 2/ to 2-3 ppm propylene produced the highest concentration of the phytotoxicants. 25 references, 2 figures, 6 tables.
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