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Infiltration and Translocation of Thiabendazole in Apple Trees by Means of a Pressure Injection Technique. Y. Pinkas, Division of Plant Pathology, The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel; E. Shabi(2), Z. Solel(3), and A. Cohen(4). (2)(3)Division of Plant Pathology, The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel; (4)Division of Citriculture, The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel. Phytopathology 63:1166-1168. Accepted for publication 19 February 1973. DOI: 10.1094/Phyto-63-1166.

A method for administering fungicides into apple trees using a pressure injection technique is described. Ten or 2.5 g of thiabendazole (TBZ) dissolved in acidified water was infiltrated into the trunk of 16-year-old apple trees. The fungicide accumulated initially in the vicinity of the injection point, forming a reservoir of TBZ inside the plant. Subsequently, a secondary distribution occurred, resulting in a gradual upward migration of the fungicide. Forty-two days after injection of the higher dose, TBZ was detected in the top branches and leaves of the tree.

Additional keywords: systemic fungicides, bioassay.