Too often producers do not notice mustard weeds in their wheat fields until the mustards start to bloom in the spring. As a result, producers often do not think about control until that time. Minimize yield loss by getting control of these weeds by late winter or very early spring.
The new 2020 K-State Weed Control Guide is now available online! Don't miss this valuable resource brought to you by K-State Research and Extension. Hard copies will be available soon.
Controlling marestail in soybeans continues to be a big challenge for Kansas no-till producers. Application timing and weed size are critical factors for successful control of this weed that germinates in the fall or early spring.
Producers should pay close attention to the growth stage of their wheat before making spring herbicide applications. Some herbicides must be applied after tillering, several must be applied before jointing, and others can be applied through boot stage.
Applications of pre-emergence herbicides at or before corn planting are important to minimize yield losses to early-emerging weeds. Learn more about this weed management practice in this article.
Many fields across Kansas and neighboring states were covered by flood waters during portions of 2019. These fields may need special considerations when it comes to weed management.
Pre-emergence, soil-active herbicides applied around the time of planting are an important part of a good weed management program. However, variability in spring weather leads to concerns about both weed control and crop injury.
Drought and late freezes have impacted wheat stands in many areas across Kansas this year. As a results, weeds are showing up and taking advantage of thin wheat stands. What are the best options for weed control at this point in the season?
A field study was recently conducted that evaluated the performance of various herbicide programs for Palmer amaranth control in post-harvest wheat stubble. Learn more about the results of this research in this article from Weed Scientist, Dr. Vipan Kumar.
Post-harvest weed control in wheat stubble is very important to conserve soil moisture and prevent weeds from going to seed and adding to the weed seedbank. Weeds are likely to be growing quickly, especially where there are thin stands.
Controlling weeds is key in order to maximize the benefits of stubble and no-till dryland cropping systems in western Kansas. Read more about the effects of weed control timing after wheat harvest in this article.
With adequate moisture and high temperatures, Palmer amaranth populations are rapidly growing and causing concern for some sorghum producers in western Kansas. What options to growers have at this point in the growing season? Read more in the article from weed scientist Dr. Vipan Kumar.
With row crop harvest well underway, it is time to start planning fall herbicide applications. Herbicide applications in late October through November can improve control of difficult winter annual weeds.
Be mindful of the many ways that weeds can spread from field to field, including hitching a ride on harvest equipment. Learn what steps can be taken to minimize spreading weed seeds during harvest activities.
There is still time to participate in a short survey concerning your soybean planting intentions for the 2021 season. This survey will help guide winter extension programming and is completely anonymous.
As of late December, grain sorghum farmers have access to IMIFLEX™ herbicide to use in igrowth® grain sorghum for the 2021 growing season. Read more about the target weeds, use rates, and rotation intervals in this article.
Weed Science Extension specialists have teamed up to launch a new podcast about the ongoing fight to control weeds. The first episode of "War Against Weeds" is available online with more episodes to follow. Check it out!
Now is the time to finalize plans for kochia control. Recent research suggests that kochia can begin emerging in early February with most kochia emerging by early April. This article will be the first in a series discussing specific options for various cropping systems.
Last week, we shared some general information about applying pre-emergence herbicides for kochia control. In this article, the focus is on specific recommendations for fields going to corn or grain sorghum this growing season.
This is the third and final article in a series discussing pre-emergence herbicides for kochia control. For this article, we cover recommendations specific to fields that will be planted to soybean or sunflower this spring and wheat in the fall.
Controlling marestail in soybeans continues to be a big challenge for Kansas no-till producers. Learn about early spring, pre-plant, and post-emergence options for treatment in this article from Extension Weed Science Specialist, Dr. Sarah Lancaster.
Residual herbicides that kill weed seeds/seedlings as they germinate or emerge are an important component of herbicide applications at or before the time of corn planting. Learn about the different options in this article from Weeds Specialist Sarah Lancaster.
With few post-emergence herbicide options for control of grass species and Palmer amaranthl in grain sorghum, having an effective pre-emergence herbicide program is very important. Learn more about the different soil-applied residual herbicides in this article.
If you did not get a chance to participate in a short survey about your herbicide application practices back in February, you have another chance! Help out the Extension Weed Science Team and fill out this short survey! Thank you!
Early season weed control is particularly important in cotton as it can be slow to develop a crop canopy. Learn the best strategies for keeping weeds at bay in your cotton fields this spring and summer.
Herbicide applications that will not directly influence crop yield can be a tough choice to make. There are some indirect benefits to pre-harvest herbicide applications in wheat, especially in fields with a high weed density. Learn more about this management practice in this article.
Post-harvest weed control in wheat stubble is very important to conserve soil moisture and prevent weeds from going to seed and adding to the weed seedbank. Weeds can grow quickly once the wheat canopy is removed.
As September begins, some producers are thinking about seeding winter cover crops in fields currently planted to corn. The successful establishment of winter cover crops is influenced by several factors. This article provides some additional details about cover crop responses to various herbicides.
A collaborative research project is underway with weed scientists from Kansas State, University of Nebraska, and University of Wisconsin. As part of this effort, they have created a survey for growers, consultants, and extension personnel.
Marestail or "horseweed" is a challenging weed to manage in no-till or minimum till systems. Fall-emerged marestail can be difficult to control if allowed to grow until planting in the following spring. Different control options are available for use in the fall while plants are still small.
A collaborative research project is underway with weed scientists from Kansas State, University of Nebraska, and University of Wisconsin. As part of this effort, they have created a survey for growers, consultants, and extension personnel. Learn how to participate in this effort in this article.
Musk thistle (is one of 12 noxious weeds in Kansas infesting nearly 500,000 acres. Control efforts should be aimed at reducing or eliminating new populations and established stands should be managed with any accepted control method. Fall is an excellent time to spray musk thistle.
Too often producers do not notice mustard weeds in their wheat fields until the mustards start to bloom in the spring. To minimize yield losses, mustards should be controlled by late winter or very early spring, before the stems begin to elongate, or bolt.
Harvest is always a great time to start planning weed management strategies for the next spring. Forming a plan now to address needs for next spring is especially important this fall due to the anticipated shortages of key herbicides. Learn what you can do to minimize the impact of a possible chemical shortage.
Last week, we shared some general information about applying pre-emergence herbicides for kochia control. This article focuses on specific recommendations for fields going to corn or grain sorghum this growing season.
Enlist One and Enlist Duo amended supplemental labels were approved on March 29 to allow use in 10 counties in Kansas (Chautauqua, Cherokee, Cowley, Elk, Greenwood, Labette, Montgomery, Neosho, Wilson, and Woodson)
Season three of “War Against Weeds” podcast is on going adding eleven new episodes since January. Season three episodes have included topics that range from kochia biology and management to the influence of the Endangered Species Act enforcement on weed management. Episodes remaining for season three include an update on herbicide resistant weed research and a discussion about using drones for weed management. Episodes are approximately 30 minutes long and free to access. They are posted at https://waragainstweeds.libsyn.com/
Getting kochia under control in any cropping system that includes wheat begins with the wheat crop during the spring, and shortly after wheat harvest. This is not always easy, even if early spring herbicide applications for kochia control were made. While a majority of kochia emerges early in the spring, emergence can extend over a period of weeks or months. A herbicide applied early in the spring will need to have residual activity to be effective on later-emerging kochia.
Making a herbicide application that will not directly influence crop yield is a difficult decision to make. Such is the case with pre-harvest weed control applications to wheat fields. However, pre-harvest applications may be beneficial, especially in wheat fields with short or thin stands or fields that were not treated earlier in the season. When broadleaf weeds grow rapidly at the end of the growing season, several potential concerns arise such as harvest difficulties, dockage problems, weed seed production, and soil water depletion.
Post-harvest weed control in wheat stubble is very important to conserve critical soil moisture and prevent weeds from going to seed and adding to the weed seedbank. This year, it will be especially important to be ready to spray after wheat harvest because of less cover from shorter and thinner wheat than we have seen in the last few years in many areas. When thinking about weed control in wheat stubble, there are two priorities – controlling already emerged weeds and preventing later flushes.
This World of Weeds feature will discuss this weedy relative of wheat, also know as joint goat grass. Jointed goatgrass is a winter annual that germinates roughly the same time as winter wheat and the rate of development of the two species is similar throughout the growing season. It is native to southern Europe and is thought to have been introduced in Kansas during the 1900s as a contaminant in imported wheat. It can be found in a variety of habitats, including roadsides, rights of ways, and fields throughout much on the United States, including all of Kansas.
The Department of Agronomy is hosting a Weed Science Field Day! This free event provides an opportunity to browse extension weed science herbicide evaluation trials, network with K-State Weed Science faculty and industry representatives, learn more about weed management and new sprayer technology, and receive 1A credit. Sign-up by July 5!