What Herbicides Are Used in Post-Emergence for Cowpeas?

In the cultivation of cowpeas, effective weed control is crucial to ensure the healthy growth and optimal yield of the crop. Post-emergence herbicides play a significant role in managing weed growth after the emergence of cowpea plants. These herbicides are specifically designed to selectively target and control weeds while minimizing damage to the cowpea plants themselves.

In a recent study evaluating the selectivity and effectiveness of herbicides for cowpea crops, various herbicides and mixtures were tested. The results revealed several post-emergence herbicides that showed promising results in terms of both selectivity for cowpeas and effectiveness in controlling weed species commonly found in cowpea fields.

Among the herbicides tested, S-metolachlor, imazamox + bentazon, bentazon + S-metolachlor + imazamox, imazamox + fluazifop-p-butyl, imazethapyr + fluazifop-p-butyl, bentazon + fluazifop-p-butyl, imazamox + bentazon + fluazifop-p-butyl, and fluazifop-p-butyl demonstrated selectivity for cowpeas. Additionally, lactofen + fluazifop-p-butyl, while initially causing severe intoxication in cowpea crops, eventually led to recovery and yields equal to or higher than other treatments.

The main weed species controlled by these herbicides included Cleome affinis, Trianthema portulacastrum, Amaranthus spinosus, Commelina benghalensis, and Digitaria bicornis. By effectively managing these weed species, farmers can protect the health and productivity of their cowpea crops.

Key Takeaways:

• Post-emergence herbicides are essential for managing weed growth in cowpea fields.
• S-metolachlor, imazamox + bentazon, and other herbicides have shown selective control of weeds in cowpeas.
• Some herbicides may initially cause intoxication in cowpea crops but can lead to recovery and high yields.
• The main weed species controlled include Cleome affinis, Trianthema portulacastrum, Amaranthus spinosus, Commelina benghalensis, and Digitaria bicornis.
• Efficient use of herbicides is crucial for maintaining the health and productivity of cowpea crops.

Recommended Herbicides for Post-Emergence Cowpea Treatment

When it comes to effectively managing weed growth and ensuring the healthy growth of cowpea crops, the use of selective herbicides in post-emergence treatment is crucial. Here are some recommended herbicides that have shown promising results:

• Atrazine: A pre-emergence herbicide widely used for controlling broadleaf and grassy weeds in cowpea fields.
• Balance Flex (isoxaflutole): Another pre-emergence herbicide that provides effective control against various weed species, including those resistant to other herbicides.
• Tricor (metribuzin): A pre-emergence herbicide with broad-spectrum activity, targeting both grassy and broadleaf weeds in cowpea crops.
• Classic (chlorimuron): A post-emergence herbicide that effectively controls broadleaf weeds in cowpeas, including species like Amaranthus spinosus and Commelina benghalensis.
• Engenia (dicamba): A post-emergence herbicide known for its efficacy in controlling various broadleaf weeds without harming the cowpea crop.
• Enlist One (2,4-D): A post-emergence herbicide used for controlling both broadleaf and grassy weeds in cowpeas, offering excellent selectivity and versatility.
• Envoke (trifloxysulfruon): A post-emergence herbicide that targets grassy weeds, providing effective control in cowpea fields.
• Gramoxone (paraquat): A non-selective post-emergence herbicide used for broad-spectrum weed control in cowpea crops.
• Liberty (glufosinate): A broad-spectrum post-emergence herbicide that effectively manages weed growth, including glyphosate-resistant species.
• Osprey (mesosulfuron): A post-emergence herbicide known for its exceptional control against grassy weeds in cowpeas.
• Roundup (glyphosate): Widely used for non-selective weed control in various crops, including cowpeas.
• Sharpen (saflufenacil): A broad-spectrum post-emergence herbicide that effectively controls both broadleaf and grassy weeds in cowpea fields.
• Stinger (clopyralid): A selective post-emergence herbicide used for controlling broadleaf weeds in cowpeas.

It is important to note that the effectiveness of these herbicides may vary depending on the specific weed species present in the field. Farmers should carefully assess their weed management needs and consult with agricultural experts to determine the most suitable herbicide for their cowpea crops.

By utilizing the recommended herbicides for post-emergence cowpea treatment, farmers can effectively suppress weed growth and promote the healthy development of their cowpea crops, ultimately maximizing yields and profitability.

Herbicide	Target Weeds	Selectivity	Application
Atrazine	Broadleaf and grassy weeds	Selective	Pre-emergence
Balance Flex (isoxaflutole)	Broadleaf and grassy weeds	Selective	Pre-emergence
Tricor (metribuzin)	Broadleaf and grassy weeds	Selective	Pre-emergence
Classic (chlorimuron)	Broadleaf weeds	Selective	Post-emergence
Engenia (dicamba)	Broadleaf weeds	Selective	Post-emergence
Enlist One (2,4-D)	Broadleaf and grassy weeds	Selective	Post-emergence
Envoke (trifloxysulfruon)	Grassy weeds	Selective	Post-emergence
Gramoxone (paraquat)	Broad-spectrum control	Non-selective	Post-emergence
Liberty (glufosinate)	Broad-spectrum control	Selective	Post-emergence
Osprey (mesosulfuron)	Grassy weeds	Selective	Post-emergence
Roundup (glyphosate)	Broad-spectrum control	Non-selective	Post-emergence
Sharpen (saflufenacil)	Broadleaf and grassy weeds	Selective	Post-emergence
Stinger (clopyralid)	Broadleaf weeds	Selective	Post-emergence

Table: Recommended herbicides for post-emergence cowpea treatment, their target weeds, selectivity, and application methods.

Cowpea Weed Control Herbicides

In order to effectively control weeds in cowpea fields, I have found that certain herbicides have shown promising results. These herbicides include S-metolachlor, imazamox + bentazon, bentazon + S-metolachlor + imazamox, imazamox + fluazifop-p-butyl, imazethapyr + fluazifop-p-butyl, bentazon + fluazifop-p-butyl, imazamox + bentazon + fluazifop-p-butyl, and fluazifop-p-butyl. When used appropriately, these herbicides have demonstrated efficient control over weed species such as Cleome affinis, Trianthema portulacastrum, Amaranthus spinosus, Commelina benghalensis, and Digitaria bicornis.

By utilizing a combination of these herbicides and applying them at the right time, farmers can effectively manage weed growth and ensure the healthy development of their cowpea crops. It is important to note that the selectivity and effectiveness of these herbicides may vary depending on the specific weed species present in the field.

For optimal weed control in cowpea fields, it is essential to follow recommended application rates and timings as outlined by agricultural experts. By doing so, farmers can maximize the effectiveness of these herbicides and minimize the potential negative impact on their crop. Together, with proper weed management strategies, these herbicides can contribute to the overall success of cowpea cultivation.