VIEW ARTICLE

Distribution of Benzimidazole Fungicides Following Pressure Injection of Pear Trees at Several Growth Stages. E. Shabi, Division of Plant Pathology, The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel; Y. Pinkas(2), and Z. Solel(3). (2)(3)Division of Plant Pathology, The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel. Phytopathology 64:963-966. Accepted for publication 30 January 1974. DOI: 10.1094/Phyto-64-963.

Pressure injection of solubilized thiabendazole (TBZ) and methyl 2-benzimidazolecarbamate (MBC) into the trunk of pear trees, shortly before leaf fall, resulted in rapid translocation of the chemicals to the branches and leaves. During the next growing season the fungicides were further translocated into the new growth and gradually accumulated in the leaves. Injection during dormancy resulted in poor primary and limited secondary distribution. When the fungicides were injected during spring, considerable primary distribution was evident. However, there was a lag period before the chemicals started to accumulate in the emerging leaves. Observations for scab infection on leaves, caused by Venturia pirina, revealed that the disease was confined to the untreated trees.