How to Manage Lambsquarters in Wheat

FBN Network

Jan 29, 2024

Lambsquarters, scientifically known as Chenopodium album, is a worldwide threat to wheat crops. 

As a farmer or agronomist, understanding the impact of lambsquarters on wheat can help you make informed decisions about your weed management strategies, ensuring the health and productivity of your wheat crops. Here is how the common weed impacts wheat: 

  • Roots: By competing for soil nutrients and water, lambsquarters can hinder the root development of wheat plants. This competition can result in reduced root growth and nutrient uptake, negatively impacting the overall health and productivity of the wheat plant.

  • Stems: Lambsquarters' competition for light can lead to decreased photosynthesis and growth, resulting in thinner, weaker wheat stems. This can compromise the plant's ability to support its grain heads.

  • Leaves: The fight for light can also result in smaller, less efficient wheat leaves, reducing the plant's photosynthetic capacity and, consequently, its energy production and growth.

  • Grains: Ultimately, the competition from lambsquarters can lead to a reduced grain yield. This reduction is due to the compromised growth and development of the wheat plant and the potential for disease and pest infestation facilitated by the presence of lambsquarters.

This post will outline:

  • How to identify lambsquarters 

  • Geographic impact of lambsquarters

  • Timing of lambsquarters emergence

  • How to manage lambsquarters in wheat

How to Identify Lambsquarters 

Early identification of lambsquarters is key to effective weed management. The weed exhibits an erect growth pattern, reaching heights of up to 3 meters. Its leaves are simple, alternate, and diamond-shaped, with a distinctive dusty, whitish coating on the underside.

The weed bears small, greenish flowers that cluster into vertical, spiky inflorescences. Its seeds, small, shiny, and black, are produced in the thousands by each plant, facilitating its rapid proliferation.

Geographic Impact of Lambsquarters

Lambsquarters is a cosmopolitan species. It is found almost everywhere but predominantly in temperate regions, especially in disturbed soils. 

Timing of Lambsquarters Emergence

It is a summer annual weed, typically emerging in the early growing season, from late spring to early summer.

How to Manage Lambsquarters in Wheat

Early identification and effective management of this weed are crucial for maintaining healthy, productive wheat crops. 

USA

Post-emergence

Apply Huskie® Herbicide post-emergence in fall or spring after the crop reaches the 1-leaf stage and up to flag leaf emergence. Apply with AMS (0.5 to 1 lb/A) for the most effective weed control. 

Burndown

Apply any of the following:

Canada

FBN® offers a variety of products that will help growers control lambsquarters in wheat.

Pre-Burndown Options:

In-Crop Options:

Crop Protection from FBN®

Proactively scouting for and responding to weed presence in your fields will help reduce potential crop damage and improve yield. FBN has a wide variety of effective herbicides to help address agronomic pressures and keep your operation on track. 

With transparent pricing, straightforward online ordering, detailed product labels and fast direct-to-farm delivery, FBN can help you get the products you need to protect your crops.


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ALWAYS READ AND FOLLOW LABEL DIRECTIONS. It is a violation of federal and provincial law to use any pest control product other than in accordance with its label. The distribution, sale and use of an unregistered pest control product is a violation of federal and/or provincial law and is strictly prohibited. We do not guarantee the accuracy of any information provided on this page or which is provided by us in any form. It is your responsibility to confirm prior to purchase and use that a product is labeled for your specific purposes, including, but not limited to, your target crop or pest and its compatibility with other products in a tank mix and that the usage of a product is otherwise consistent with federal, provincial and local laws.  We reserve the right to restrict sales on a geographic basis in our sole discretion. You must have a valid applicator license and/or be a certified farmer, to use restricted and commercial pest control products (exceptions may apply based on province).  Please consult your applicable provincial authority for complete rules and regulations on licensing, use, and recording keeping requirements of restricted and commercial pest control products.

All product recommendations and other information provided is for informational purposes only. It is not intended to be a substitute for consulting the product label or for specific agronomic, business,or professional advice. Where specific advice is necessary or appropriate, consult with a qualified advisor. Neither Farmer's Business Network Canada, Inc. nor any of its affiliates makes any representations or warranties, express or implied, as to the accuracy or completeness of the statements or any information contained in the material and any liability therefore is expressly disclaimed.

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