How Long After Spraying 24d Can I Plant

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This calendar week I received telephone calls from several growers request virtually the planting intervals for corn and soybean following 2,4-D/dicamba applications in a burndown program. With cold, wet atmospheric condition in March, many producers may be facing a smaller than expected window for making their herbicide burndown applications in April. This makes timely applications now even more important to provide for a proper interval before planting this year.

Dicamba and ii,4-D are unremarkably used burndown herbicides for control of winter annual broadleaf weeds such as dandelion, field pennycress, henbit, tansy mustard, etc.

Additionally, several summertime annual weed species in Nebraska emerge early in the season, prior to planting corn and soybean, and need to be controlled before they grow too large to exist effectively controlled.

Of particular concern are giant ragweed, kochia, and marestail; we believe there are numerous populations of these species in Nebraska that cannot be controlled by glyphosate because they have evolved resistance to glyphosate. Therefore, use of 2,4-D/dicamba has increased in contempo years, particularly for control of glyphosate-resistant marestail and giant ragweed. Based on observations in our giant ragweed research studies, we accept had success controlling glyphosate-resistant giant ragweed with any herbicide plan containing 2,four-D as a component of a burndown programme.

If you employ 2,4-D prior to planting, be sure to attach to the planting interval specified on the characterization. Several ii,four-D products have different planting intervals for soybean, somewhere in the range of 7 to 30 days depending on awarding charge per unit.

As a general guideline, the following planting intervals should be maintained for corn and soybean after applying 2,4-D/dicamba

• If soybean is to exist planted this year, do NOT apply dicamba. XtendiMax, a new dicamba production with VaporGrip Technology, tin can be applied in burndown awarding, but only if planting Roundup Fix 2 Xtend Soybean this season.
• If 2,four-D (4 lb/gal formulation) is applied at xvi fl oz/acre in a burndown program, the planting interval should exist seven days for corn and soybean
• If 2,4-D (four lb/gal) is applied at a charge per unit above 16 fl oz/acre in a burndown plan, the planting interval should be 14 days for corn and xxx days for soybean
• If dicamba is applied at iv oz/acre in a burndown program, the planting interval for corn should be five days. If dicamba is applied at 8 oz/acre, the planting interval for corn should exist seven days. DiFlexx and DiFlexx DUO are dicamba products with CSI safener; therefore, corn tin be planted any fourth dimension after awarding of these products, which may exist particularly helpful in a replant state of affairs. Care should be taken, nonetheless, so that corn seed does non contact the herbicide.

Figure 1. Nontreated plot infested with glyphosate-resistant giant ragweed.

Figure 2. Control of glyphosate-resistant giant ragweed was accomplished with ii,4-D at 16 fl oz/acre three weeks before planting soybean and Authority First at 6 oz/acre practical pre-emergence.

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Source: https://cropwatch.unl.edu/2017/planting-interval-corn-and-soybean-after-24-d-dicamba-burndown-application

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