The Systemic Behavior of Systox Thiol Isomer Sulfoxide and Methosulfate in Plants12

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Abstract
The systemic behavior of the Systox thiol isomer and its sulfoxide and methosulfate derivatives when applied topically to stems of cotton plants has been studied by means of P32 radiotracers and paper chromatographer. The accumulation of radioactive materials in the leaves of these plants was most rapid with the thiol isomer up to a period of 14 days after application; after that period the sulfoxide treatment gave the higher values. The much slower accumulation of radioactivity from the methosulfate indicated a lower degree of penetration of this polar compound through the plant cuticle. Radioautography after topical application of these systemics to young lemon leaves showed that the order of penetration and spread in the leaf interior was thiol isomer methosulfate < thiol isomer sulfoxide < thiono isomer < thiol isomer. The rates of metabolism and decomposition of the thiol isomer and sulfoxide were approximately the same, and small amounts of thiol isomer sulfone formed from both treatments.

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