Weeds that are outside of fields can still be harmful to crop production. This does not include ditch banks or fallow fields. Non-crop weed control includes weeds around buildings, roadways, equipment yards, fence lines etc. It is different than fallow ground or ditch banks weed control and includes places where crops are not grown. Weeds in non-crop areas can be a source of weed seeds that blow or are carried into places where crops are grown. They can also be a refuge for insects, diseases and rodents. The reason that these herbicides are registered for non-crop areas is that they are broad spectrum and persistent. Some are registered for use in fields but at much lower rates than for non-crop areas. For instance, Diuron can be used on alfalfa at 1 to 1.5 qts/ac. but is used for non-crop areas at 12 qts/ac.
|
Herbicide |
Weeds Controlled |
Activity |
Soil Residual |
Comments |
|
Bromacil |
Broadleaves and grasses |
Preemergence |
1 to 2 years |
The nuclear option Should be incorporated with water. Keep away from roots of desirable vegetation. |
|
Hexazinone |
Broadleaves and grasses |
Preemergence and Postemergence |
1 to 2 years |
Keep away from roots of desirable vegetation. Incorporate with water. |
|
Diuron |
Broadleaves and grasses |
Preemergence and Postemergence
|
2 years |
Incorporate with water but do not leach into roots of desirable vegetation |
|
Prometon |
Broadleaves and grasses |
Preemergence and Postemergence
|
1 to 2 years |
Must be incorporated with water |
|
Tebuthiuron |
Broadleaves and grass. Good on hardwood trees |
Preemergence and postemergence |
2 years |
Incorporate with water. Contact with even on feeder root of desirable vegetation can be lethal |
|
Imazapyr |
Broadleaves and grasses |
Preemergence and post emergence |
1 year |
Primarily a postemergence herbicide but is readily absorbed by rootsif incorporated with water |
|
sulfometuron |
Broadleaves and grasses |
Preemergence and post emergence |
1 year |
Must incorporate with water |
|
Aminopyralid |
Broadleaves |
Preemergence |
1 year |
broadleaves only. Shorter soil residual for weeds but crops can not be planted for 1-2 years |
