- Glyphosate and paraquat – most cover crops can be planted any time after application.
- Liberty – according to a recent label update, Liberty can be applied 7 days before cover crop establishment. Planting of cover crops for conservation purposes may be planted in fields previously treated with Liberty as long as these cover crops are not grazed by livestock or harvested for feed. For best results, do not plant cover crops less than 7 days after an application of Liberty nor before 1/2 inch of rainfall or irrigation has occurred. Planting sooner than this may result in stand reduction.
- 2,4-D – depending on the rate of 2,4-D applied, at least a week to four-weeks waiting period is necessary before establishing cover crops. If small grain covers are being established, some research suggests a minimum delay of 7-10 days after application at rates of 1 pint/acre of 2,4-D ester. Also, other studies have shown that certain clovers (e.g., red and crimson) and alfalfa may be established within the same constraints with 2,4-D ester. To be certain, a longer waiting period and rainfall help to reduce the potential for injury.
- Dicamba – usually requires at least a couple weeks or more before certain cover crops can be planted and this also is directly related to the amount applied. Some have asked about the use of Sharpen and Elevore as a burndown prior to cover crop planting. According to their labels, some suggestions can be made.
- Sharpen (1 fl oz) – no restrictions for small grains but has a 1-month wait period for other cover crops (species not specified; but some may be more sensitive). Keep in mind, once Sharpen has been applied, the cover crop cannot be harvested or grazed for livestock feed.
- Elevore – small grains, ryegrass, and canola can be planted after 14 days but there is a 9-month wait for clover and mustard species.
Advertise Follow Us