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Failed Cotton Herbicide Rotation Restrictions To Corn In Oklahoma

Effective weed management is fundamental to achieving successful crop production and is essential for maintaining agricultural productivity. Herbicides play a vital role in this aspect, assisting farmers in managing weed populations and protecting crop health. In Oklahoma, instances of failed cotton crops and the subsequent challenges with herbicide rotation restrictions when replanting to corn have emerged as an issue for Oklahoma producers.

 

Several factors can influence a cotton crop failure such as hail, freezing temperatures after emergence, heavy rainfall resulting in standing water or pest/disease issues. Utilizing certain herbicides intended for use in cotton can make it challenging for producers when they are faced with a replant situation. These herbicide residues, intended for weed control in cotton crops, can persist and disrupt growth of subsequent crops like corn, leading to complications when rotating.

 

This publication delves into the significance of adhering to herbicide rotational restrictions during the transition from failed cotton to corn in Oklahoma. By consolidating information on commonly used herbicides in cotton production and their residual effects on corn crops, farmers can make educated choices to safeguard their crops against potential herbicide damage and maximize yields.

 

The significance of rotational restrictions extends beyond protecting crop health; it also plays a crucial role in managing herbicide resistance in weeds. By adhering to rotational guidelines, farmers can mitigate the risk of herbicide-resistant weed populations emerging, thereby preserving the efficacy of herbicides for future applications and maintaining sustainable weed management practices.

 

Moreover, adherence to rotational restrictions promotes long-term soil health and fertility by minimizing the buildup of herbicide residues, which can have detrimental effects on soil microbiota and nutrient cycling processes. By following proper rotational practices, farmers can ensure the continued productivity and sustainability of their agricultural operations while mitigating environmental risks associated with herbicide use.

 

Table 1. Herbicide rotational restrictions for sorghum planted after failed cotton in Oklahoma.
Herbicide Component Herbicides MOA* Corn Replant Restrictions Notes
2,4-D LV6 2,4-Dichlorophenoxyacetic Acid 4 0 months  
AIM EC Carfentrazone 14 0 months  
Assure II Quizalofop 1 4 months Restriction is minimized with Enlist field corn.
Caparol Prometryn 5 5 months  
Clarity Dicamba 4 0 months  
Dual Magnum S-Metolachlor 15 0 months  
Fusilade DX Fluazifop 1 2 months  
Fusion Fluazifop Fenoxaprop 1 2 months  
Roundup Power Max Glyphosate 9 0 months  
Gramoxone SL 2.0 Paraquat 22 0 months  
Liberty 280 SL Glufosinate-Ammonium 10 0 months  
Direx 4L Diuron 7 Following season  
Engenia Dicamba BAPMA Salt 4 0 months  
Enlist Duo with Colex-D Technology 2,4-D Choline Salt Plus Glyphosate DMA Salt 4 & 9 7-14 days Rotation intervals increase with higher application rates. Enlist corn, cotton and soybeans can be planted immediately.
Enlist One with Colex-D Technology 2,4-D Choline Salt 4 14 days Enlist corn, cotton and soybeans can be planted immediately.
MSMA 6.6 MSMA 17 0 months  
Outlook Dimethenamid-P 15 0 months Replant only with Concep-treated or screen-treated seed.
Poast Plus Sethoxydim 1 1 month  
Prowl H2O Pendimethalin 3 0 months  
Select Max Clethodim 1 6 days For RoundUp Ready Corn.
Sequence Metolachlor & Glyphosate 15 & 9 0 months  
Sharpen Saflufenacil 14 0 months  
Staple LX Pyrithiobac 2 10 months Corn may be planted 10 months after Staple LX application was made in cotton providing that the total amount of Staple LX from all applications did not exceed 3.8 fluid ounces per acre. No additional soil mixing is required beyond that normally performed for a production system.
Tavium Plus VaporGrip Dicamba & S-Metolachlor 4 & 15 0 months  
Treflan HFP Trifluralin 3 12 months  
Valor SX Flumioxazin 14 1 month Days listed are based on after receiving 1 inch of rainfall. Rotation restrictions can be higher for higher than 3 oz/ac rates.
Warrant Acetochlor 15 0 months  
XtendiMax with Vapor Grip Technology Dicamba DGA Salt 4 30-45 days Rotation intervals increase with higher application rates.

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