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Herbicide application -- Re-thinking Delta T

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Published on Aug 21, 2012

Delta T is the relationship between temperature and relative humidity that gives a score for deciding when best to apply sprays on crops. John Both from NuFarm at the Eyre Peninsula Agricultural Research Foundation (EPARF) members day held at the Minnipa Agricultural Centre discuses Delta T for making spray decisions. In the summer Delta T can often be high during the day, resulting in spraying occurring in the morning or evening. These are times when inversion layers are most likely resulting in drift issues. Research has shown that high Delta T's in summer can still give good weed control so long as the weeds are actively growing. Delta T is a good guide but you can consider other factors when making spraying decisions to reduce the risk of drift and achieve good weed control.

Follow the links below to the other videos in this series:

Spray technology -- the EPARF members day
Herbicide application -- Re-thinking Delta T
Herbicide pathways -- an overview
Near infra red weed detection technology
Spray quality and effect of adjuvants
Spray application -- Factors to consider

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