Fall is a good time to control perennial and winter annual weeds, but when exactly is the best time to spray? This quiz can help.

Identify the weed in each photo then choose the best time to spray each of these weeds.

1.

Immediately after combining

4-6 weeks after cutting

Just before freeze up

Don't bother

2.

Immediately after combining

4-6 weeks after cutting

Just before freeze up

Don’t bother

3.

Immediately after combining

4-6 weeks after cutting

Just before freeze up

Don’t bother

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