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Proceedings of the Sixty-first Annual Meeting of the Northeastern ...

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115<br />

CHEMICAL CONTROL IN ORCHARDS WITH COMMERCIAL APPLICATION<br />

EQUIPMENT. W.H. Palmer, Reality Research; Williamson, NY, and D.I. Breth, Cornell<br />

Cooperative Extension, Albion, NY.<br />

ABSTRACT<br />

Controlling weeds in commercial apple orchards is not a major concern for many<br />

New York apple growers. This potentially leads to over-use <strong>of</strong> herbicides, weed<br />

resistance, weed problems at harvest, and negative effects on yields. Previous results<br />

with hand boom applications did not match <strong>the</strong> results that were being obtained with<br />

commercial application equipment. Commercial herbicide application equipment will be<br />

described. The trial used commercial equipment to apply treatments <strong>of</strong> several "knockdown"<br />

herbicides (paraquat, glyphosate, 2,4-D, glufosinate, carfentrazone, and a<br />

glyphosate/2,4-D premix) as 1 or 2 sprays with adjuvants. The trial also includes<br />

applications <strong>of</strong> <strong>the</strong> “knock-down” herbicides with residual herbicides (simazine, diuron,<br />

pendimethalin and flumioxazin. Results will be presented as season-long weed<br />

evaluations with each treatment. O<strong>the</strong>r reasons for good orchard weed control will be<br />

presented, along with one grower's ideal control program that includes leaving some<br />

“friendly” weeds in <strong>the</strong> orchard.<br />

97

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