Effects of Oxygen and Sunlight on Decomposition of Rotenone in Spray Mixtures1

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Abstract
Analytical evidence is presented to prove both the O2-induced decomposition and the photo-decomposition of rotenone and derris-containing prepns. incorporated into spray materials. The theoretical and the practical aspects of the conclusions derived from the data are discussed in detail. Several suggestions as to possible theoretical avenues of approach to further quantitative analyses of the problem are given. The advisability of protecting all spray materials incorporating rotenone and/or its congeners against the effects of atmospheric oxidation, sunlight, and high temps., is emphasized; these toxicants, by themselves, are drastically short-lived under field conditions.