Abstract
Abstract Airblast spray applications of ammonium thiosulfate (ATS) were made to individual peach trees in a single row or to small blocks 5 rows wide and 10 trees long to determine if drift from adjacent rows increased bloom thinning. Increased flower thinning was found in the center row of the 5-row-wide-block when compared by regression analysis to applications made to trees in a single row. Ethylene-bisdithio-carbamate (Zineb 78WP) was used to determine the amount of spray deposit contributed by airblast sprays to adjacent rows. Airblast spraying of peach trees in full bloom contributed chemical deposits to peach flowers in the adjacent row equal to 43% of that deposited on the sprayed row, and 26% to the second row removed.
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