The Translocation of Radioactive (S35) Bayer 19639 in Pineapple Plants1

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Radioautographs revealed that the radioactive sulfur in S35- tagged Bayer 19639 (Di-Syston) is translocated from the soil through the entire pineapple plant. Absorption is greatest in the roots and decreases to barely discernible quantity in the green half-developed fruit. Bioassays revealed that only in the region of greatest absorption—the roots—was the concentration of Bayer 19639 high enough to be toxic to mealybugs

Document Type: Research Article

Publication date: December 1, 1958

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