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Common Root Rot

Overview

Common root rot, a notorious fungal disease caused by the Cochliobolus sativus pathogen, poses a significant threat to wheat crops across the globe.

Common Root Rot primarily targets the roots and the crown of the wheat plant. Infected roots struggle to absorb water and nutrients effectively, leading to stunted growth. When the crown, a crucial part of the plant that stores and supplies nutrients to the developing grain, becomes infected, it can result in reduced grain size and number.

Common Root Rot can trigger significant physiological changes in wheat plants. The disease reduces the plant's photosynthetic capacity by affecting the leaf area and chlorophyll content. This reduction in photosynthesis can lead to poor grain filling and lower grain yield.

Moreover, the disease can compromise the plant's structural integrity, making it more prone to lodging, especially under windy conditions.

How to Identify Common Root Rot

Identifying common root rot can be tricky due to its symptoms' similarity with other root diseases. However, understanding the specific signs can facilitate early detection and management.

The most evident sign of common root rot is the browning or darkening of the subcrown internode and the crown. This browning typically starts at the root tip and ascends towards the crown. In extreme cases, the entire root system, including the crown, may turn black. The disease may also stunt the growth of affected plants and, in some instances, cause premature death.

Beyond the physical appearance, other signs of common root rot include the presence of small, black fruiting bodies (pycnidia) on the surface of the affected roots and crowns. These pycnidia produce spores that propagate the disease.

Geographic Reach of Common Root Rot

Common root rot is a worldwide issue, affecting wheat crops in North America, Europe, Asia, Australia, and Africa. It flourishes in temperate climates and is more common in fields with a history of wheat or barley crops.

Timing of Common Root Rot

Common root rot typically emerges in the early stages of the growing season, especially under wet, cool conditions. However, symptoms become more noticeable later in the season, particularly during the heading and ripening stages.

How to Manage Common Root Rot in Wheat

Broad-spectrum fungicide seed treatments can suppress common root rot early in the season. Find a wide variety of fungicides at FBN.

Consider using a starter with phosphorus like Inhabit P to boost early season plant health and vigor.

Inhabit P Webinar

Disclaimer

© 2014 - 2024 Farmer's Business Network, Inc. All rights Reserved. The sprout logo, “Farmers Business Network”, “FBN”, “FBN Direct” are trademarks or registered trademarks of Farmer's Business Network, Inc. This content was written by Norm℠, reviewed and edited by Mikaela Tierney.

This content was generated with the assistance of Norm℠, FBN’s artificial intelligence (AI) Ag Advisor, based on a dataset of information containing general industry best practices and research. The AI model did not use specific external sources to generate this content. Our process involves using AI to aid human subject matter experts with the initial drafting and/or refinement of content.

The information and content provided is believed to be reliable, but its accuracy is not guaranteed. The content is provided for informational purposes only. It is not intended to be a substitute for specific agronomic, business, or professional advice, and should not be relied upon as such. Neither Farmer's Business Network 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. If you have any questions or feedback about the content, please feel free to contact us or visit our FAQ (https://www.fbn.com/community/blog/norm-faq).

Every product that labels COMMON ROOT ROT as a weed, pest, or disease the product can be applied against is shown below. Click any product for label and more information.
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