Weed Management in Corn - University of Guelph
Weed Management in Corn - University of Guelph
Weed Management in Corn - University of Guelph
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Time <strong>of</strong> Day<br />
Summary<br />
1. Change <strong>in</strong> efficacy dur<strong>in</strong>g the day is thought to be<br />
affected by:<br />
a. Air temperature – 9.5-11.5 O C (Mart<strong>in</strong>son et al. 2002)<br />
i. Less viscous epicuticular wax (Price, 1983)<br />
ii. Increased membrane permeability (Anderson et al., 1993)<br />
iii. Increase <strong>in</strong> rates <strong>of</strong> diffusion (Price, 1993)<br />
iv. Increased enzyme activity and metabolic processes (Price, 1993)<br />
b. Leaf angle – decrease <strong>in</strong> spray <strong>in</strong>terception and retention -<br />
85% (Andersen and Koukkari, 1978; Mart<strong>in</strong>son et al,<br />
2002)
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