AGR-259: Multi-SOA Pre-emergence Herbicides for Palmer Amaranth and Waterhemp Control

Travis Legleiter | Apr. 24, 2024 (Minor Revision)

Waterhemp and Palmer amaranth are among the most troublesome and hard to control weeds in soybean fields in Kentucky. Both species have spread across the state over the past ten to fifteen years. Resistance to ALS-inhibiting herbicides [Group 2] and glyphosate [Group 9] is widespread in both species, while PPO-resistance [Group 14] is continually spreading especially in waterhemp. Herbicide manufacturers have developed several herbicide premix formulations targeted at controlling waterhemp and Palmer amaranth that contain multiple effective sites of action, thus farmers have options to choose from.

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AGR-6: Weed Control Recommendations for Kentucky Grain Crops, 2024

J.D. Green, Travis Legleiter | Nov. 15, 2023 (Minor Revision)

The use of herbicides suggested in this publication is based on research at the Kentucky Agricultural Experiment Station and elsewhere. We have given what we believe to be the most effective herbicides, with the most suitable rates and times of application. Smaller files are available <ahref=http://www2.ca.uky.edu/agc/pubs/agr/agr6/agr6.htm>here.</a>

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ID-139: A Comprehensive Guide to Corn Management in Kentucky

Carl Bradley, J.D. Green, John Grove, Greg Halich, Erin Haramoto, Cam Kenimer, Carrie Knott, Chad Lee, Travis Legleiter, Sam McNeill, Michael Montross, Hanna Poffenbarger, Dan Quinn, Edwin Ritchey, Montse Salmeron, Jordan Shockley, Tim Stombaugh, Raul Villanueva, Ole Wendroth, Kiersten Wise | Dec. 13, 2022 (Major Revision)

Corn is a summer annual crop that is grown widely across Kentucky, the United States, and around the world. In the United States, field corn is grown on about 85 million acres (34 million hectares) while sweet corn is grown on about 600,000 acres (240,000 hectares) and popcorn is grown on about 200,000 acres (81,000 hectares). Most of the field corn across the United States is yellow dent corn. In Kentucky, both yellow dent corn and white dent corn are grown. Corn acres in Kentucky peaked at 3.85 million in 1917 and have been around 1.2 to 1.5 million acres since the 1970s (USDA-NASS, 2020). Most corn in Kentucky today is grown in minimum tillage or no-tillage conditions. Most corn acres are rotated with soybean or wheat and double-crop soybeans.

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ID-268: Kentucky Grain Crop Production at a Glance

Carl Bradley, John Grove, Carrie Knott, Chad Lee, Travis Legleiter, Sam McNeill, Edwin Ritchey, Raul Villanueva, Kiersten Wise | Jan. 13, 2021 (New)

A quick resource on grain crop production.

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ID-268P: Kentucky Grain Crop Production at a Glance (poster)

Carl Bradley, John Grove, Carrie Knott, Chad Lee, Travis Legleiter, Sam McNeill, Edwin Ritchey, Raul Villanueva, Kiersten Wise | Jan. 13, 2021 (New)

A quick resource on grain crop production. NOTE: This poster is 25 x 38 inches. ID-268 is the booklet-sized version.

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AGR-260: Palmer Amaranth and Waterhemp Control in Corn and Soybean

Travis Legleiter | Dec. 14, 2020 (New)

Understanding the biology of a weed is the first step in implementing an effective weed control program. This is especially true with Palmer amaranth (<i>Amaranthus palmeri</i>) and waterhemp (<i>Amaranthus tuberculatus</i>), as understanding their emergence patterns, competitiveness, adaptability, and seed production all need to be considered when developing a control program.

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AGR-256: Identification of Palmer Amaranth, Waterhemp and Other Pigweed Species

Travis Legleiter | Oct. 16, 2020 (New)

Palmer amaranth (Amaranthus palmeri) and waterhemp (Amaranthus tuberculatus) are two species of the Amaranthus family that have enveloped the corn and soybean growing landscape of the United State over the past decade. Herbicide resistant Palmer amaranth first began infesting western Kentucky along the Mississippi and Ohio rivers in the early 2000's and has spread along the rivers and into the uplands over the last two decades. The introduction and spread of waterhemp had not been as widespread in Kentucky, although a rapid spread of waterhemp over the last 5 to 10 years has been noted especially in central Kentucky. Both Amaranthus species can be very difficult to control in soybean and corn due to herbicide resistance. The first step in effectively managing or controlling both species is to properly identify them when they first invade your fields. Early management decisions when Palmer amaranth and waterhemp first invade is key to long-term control.

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ID-249: A Comprehensive Guide to Soybean Management in Kentucky

Ric Bessin, Carl Bradley, J.D. Green, John Grove, Greg Halich, Erin Haramoto, Carrie Knott, Chad Lee, Travis Legleiter, Josh McGrath, Sam McNeill, Javier Reyes, Edwin Ritchey, Montse Salmeron, Jordan Shockley, Claire Venard, Raul Villanueva, Ole Wendroth, Kiersten Wise, Xi Zhang | Jun. 7, 2018 (New)

This publication provides information on soybean growth and development, principles of variety selection, and management practices to maximize soybean profitability in Kentucky.

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AGR-148: Weed Control in Alfalfa and Other Forage Legume Crops

J.D. Green, Travis Legleiter | Apr. 23, 2018 (Major Revision)

The importance of weed control in forage production should not be overlooked, especially when you consider the high investment associated with alfalfa and other legume forages. Weeds reduce forage yield by competing for water, sunlight, and nutrients. In addition to yield losses, weeds can also lower forage quality, increase the incidence of disease and insect problems, cause premature stand loss, and create harvesting problems. Some weeds are unpalatable to livestock or, in some cases, may be poisonous.