Inconsistent Weed Control With Burndown Herbicides

Mark VanGessel, Extension Weed Specialist; mjv@udel.edu

I have had a number of phone calls about poor control for spring burndowns. A few things to consider:

1) We have had less than ideal weather for activity (a lot of cool nights and overcast days).

2) Have you used spray volumes that are adequate to get good coverage?

3) Are you using a spray tip to get good/even coverage?

4) Was the right product(s) and rate used?

Often, if we experience only one of these issues then control is acceptable; but when two or more of them occur at the same time, weed control can suffer.

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