A selective residual herbicide for use in agricultural crops
Zidua SC herbicide is a selective rate-dependent residual preemergence herbicide for controlling annual grass weeds, sedges, and annual broadleaf weeds (including biotypes resistant to ACCase inhibitors, ALS inhibitors, and glyphosate) that infest celery, chickpea, corn, cotton, dry bulb onions, fallow, leek, mint, peanut, perennial coolseason grasses grown for seed production, potato, safflower, soybean, and sunflower listed in Table 1 and wheat listed in Table 2. Refer to Crop-specific Information section for use directions specific to each labeled crop. Periods of dry weather following application of Zidua SC may reduce herbicidal effectiveness. Zidua SC must be activated by at least 1/2 inch of rainfall or irrigation before weed germination and emergence. When Zidua SC is not activated and weeds emerge, a labeled postemergence herbicide or shallow cultivation may be needed to control weed escapes. Zidua SC does not control emerged weeds.
Herbicidal activity of Zidua SC may be reduced if trash on the soil surface from the previous crop covers more than 25% of the application area. Manage trash levels if needed with combine straw shredder/spreaders, earlier burndown of emerged weeds, or light tillage.
Mode of Action
Zidua SC herbicide acts to inhibit very long-chain fatty acid synthesis as a Group 15 (WSSA)/Group K3 (HRAC) herbicide. It is a root-and-shoot growth inhibitor that controls susceptible germinating seedlings before or soon after they emerge from the soil.
Herbicide Resistance Management
Zidua SC is a Group 15/Group K3 herbicide. Any weed population may contain or develop plants naturally resistant to Zidua SC and other Group 15 herbicides. Weed species with resistance to Group 15 may eventually dominate the weed population if Group 15 herbicides are used repeatedly in the same field or in successive years as the primary method of control for targeted species. This may result in partial or total loss of control of those species by Zidua SC or other Group 15 herbicides. To delay herbicide resistance consider:
• Avoiding the consecutive use of Zidua SC or other target-site-of-action Group 15 herbicides that have a similar target site of action on the same weed species.
• Using tank mixes or premixes with herbicides from different target-site-of-action groups as long as the involved products are all registered for the same use, have different sites of action, and are both effective at the tank mix or prepack rate on the weed(s) of concern.
• Basing herbicide use on a comprehensive IPM ( Integrated Pest Management) program including cultural and mechanical methods.
• Monitoring treated weed populations for loss of field efficacy, and control of escapes with effective alternative herbicides or mechanical methods.
• Identify weeds present in the field through scouting and field history and understand their biology. The weedcontrol program needs to consider all of the weeds
• Scout fields prior to application to identify the weed species present and their growth stage to determine if the intended application will be effective.
• Scout fields after application to verify the treatment was effective.
• Suspected herbicide-resistance weeds may be identified by these indicators:
1. Failure to control a weed species normally controlled by the herbicide at the dose applied, especially if control is achieved on adjacent weeds;
2. A spreading patch of non-controlled plants of a particular weed species; and
3. Surviving plants mixed with controlled individuals of the same species.
• If resistance is suspected, treat weed escapes with an herbicide with a different MOA and/or use non-chemical methods to remove escapes, as practical, with the goal of preventing further seed production.
• Report any incidence of non-performance of this product against a particular weed species to your local BASF representative.
• Contacting your local extension specialist, certified crop advisors, and/or manufacturer for herbicide resistance management and/or integrated weed management directions for specific crops and resistant weed biotypes.
No crop injury is expected when Zidua SC is applied according to label directions and under normal environmental conditions. Application to crops under stress
because of inadequate or excess of moisture for normal crop development, cool and hot temperatures, sodic soils, poorly drained soils, hail damage, flooding, pesticide injury, mechanical injury, or widely fluctuating temperatures may result in crop injury.
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