ISHS Acta Horticulturae 363: III International Symposium on Replant Problems
WEED CONTROL IN A NEWLY PLANTED HIGH DENSITY APPLE ORCHARD |
| Authors: | E.J. Hogue, W. Peters |
| Abstract:
Residual herbicides were evaluated on first year growth and second year yield as well as on tolerance of McIntosh/M.9 to a range of rates of simazine and metribuzin. In the first experiment, the combination of simazine at 1 kg/ha plus pendimethalin at 3 kg/ha provided excellent weed control and better growth than in the hand weeded check, but yields were not improved by this or seven other herbicide treatments. In the second experiment, the highest rates of both chemicals caused some leaf injury but tree growth in the year of planting was not affected. However, blossom count the following spring was reduced by all chemical treatments. Although the blossom count was reduced, yield was only reduced with the two highest rates of simazine. | |
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