Control of marestail in no-till soybeans
- early spring - glyphosate + 2,4-D + Sonic (2.5 oz/A); at plant - Sonic (2.5 oz) + Gramoxone
- early spring - glyphosate + 2,4-D + metribuzin (4 oz); at plant - Canopy DF (4 oz) + metribuzin (2 oz) + Sharpen (1 oz)
- early spring - glyphosate + 2,4-D + metribuzin (6 oz); 7 days preplant - Envive (4 oz) + 2,4-D ester
5. So this all seems really involved. Can’t I just do it all with one spring preplant treatment?
Maybe - but this is not an approach that has consistently worked well (see photos below). This is difficult to accomplish unless the marestail population in the field has been well managed for several years and the population is generally low. Growers should use their own previous experiences here as guidance, and plan on increasing the complexity and rates of the herbciide program. Problems with skipping the fall treatment, and applying everything at once in spring include the following:
- applying early in spring when plants are small can result in poor control of plants that are emerging in mid-season if not enough of the residual herbicide remains
- applying closer to planting to maximize the length of residual often results in less effective control of larger, older marestail plants, especially those that have overwintered.
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