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

  • 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

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. 

For managing Lambsquarters in wheat, consider using Rapport® BroadSpec Herbicide. This herbicide is specifically labeled for use with wheat and is effective against narrowleaf Lambsquarters. Rapport® BroadSpec Herbicide contains ingredients such as Tribenuron methyl and Thifensulfuron methyl. You can find this herbicide available from FBN®.

The application rates for Rapport® BroadSpec Herbicide can be found on the label here. Always follow the instructions and recommended rates provided on the label to ensure effective and safe application.

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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