Follow with a postemergence application of glyphosate 24-30 days after planting glyphosate-resistant soybeans. Group 14 herbicide: Apply Valor SX preplant or preemergence. Group 2 herbicide: Apply Python WDG preemergence and follow with a postemergence application of glyphosate 24-30 days after planting glyphosate-resistant soybeans. Do not apply Flexstar GT 3.5 to any field more than once every 2 years. Group 9 and 14 herbicides: Apply Flexstar GT 3.5 postemergence before lambsquarter is 8 in. Group 2 and 9: Tank mix Harmony SG with glyphosate and apply 24-30 days after planting glyphosate-resistant soybeans as a total postemergence control program. or taller, use 1.5 times the recommended rate or see below for additional information about this problem weed.Ģ4 fl. Apply these or other glyphosate products 24-30 days after planting glyphosate-resistant soybeans as a total postemergence control program.
Group 9 Herbicides: For use with glyphosate-resistant (Roundup Ready) soybeans only. Glyphosate-resistant (Roundup Ready) soybean varieties Situation
§Not for use in Nassau and Suffolk Counties.ġEffectiveness ratings for Dimetric DF are not accurate for triazine-resistant lambsquarters, pigweed, and ragweed. *Restricted-use pesticide may be purchased and used only by certified applicators or used by someone under the direct supervision of a certified applicator. These “GROUP NUMBERS” are included in the “Chemical weed control tables” in each crop section.Ĭornell CALS Weed Science website - a website to help you reduce the impact of these unwanted plants in fields, gardens, landscapes and ecosystems.Įffectiveness of selected soybean herbicides on annual weeds Broadleaf Annual Weeds A group number is given to all herbicides with the same site of action. Revised classification of herbicides by site of action for weed resistance management strategies. The Weed Science Society of America (WSSA) has approved a numbering system to classify herbicides by their site of action (Mallory-Smith, C.A. To effectively utilize herbicides with different sites of action, everyone involved in decisions about weed management must have the site of action classification readily available. These practices will help manage existing herbicide resistant weed populations and delay development of new resistant weed populations. Herbicide resistance management involves the use of crop rotation and cultivation along with herbicide rotation and/or use of herbicide combinations that include herbicides with different sites of action (how they affect weeds). A postemergence application of glyphosate should be made 24 to 30 days after planting.īecause soybeans are sensitive to *atrazine and *†Princep residues, care should be taken the year before planting soybeans to ensure that herbicide carryover will not affect their establishment. Several options that enhance burndown, provide residual weed control, or control dandelions in no-tillage soybeans can be found in Table 6.7.3. When planting no-tillage glyphosate-resistant soybeans, a burndown herbicide should be used before or at the time of planting if significant weed cover is present.
#Soya bean how to
Table 6.7.2 provides suggestions on how to improve lambsquarters control with either a one pass or two pass program.
Lambsquarters that is greater than 3 inches tall may require increased rates of glyphosate or a tank mix of Harmony SG or of Synchrony XP with glyphosate. Normal application rates of glyphosate in the field or greenhouse have consistently controlled lambsquarters that is no more than 3 inches tall. While this works in most situations, less than desirable common lambsquarters control has been reported in some instances. With conventional tillage, it is recommended that glyphosate (Roundup PowerMax, Durango DMA, Touchdown Total, etc.) be applied to glyphosate-resistant soybeans 24 to 30 days after planting. While this technology made postemergence broad-spectrum weed control with a single non-residual herbicide a reality in some situations, other situations require a tank-mix partner or a two-pass weed control program. Commercialization of glyphosate-resistant (Roundup Ready) soybeans introduced a new era in soybean weed control.
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