PB1728-Weed Management in Annuals, Perennials and Herbaceous Ground Covers: Nursery Production and Professional Landscape Maintenance
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University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Commercial Horticulture UT Extension Publications April 2010 PB1728-Weed Management in Annuals, Perennials and Herbaceous Ground Covers: Nursery Production and Professional Landscape Maintenance The University of Tennessee Agricultural Extension Service Follow this and additional works at: https://trace.tennessee.edu/utk_agexcomhort Part of the Plant Sciences Commons Recommended Citation "PB1728-Weed Management in Annuals, Perennials and Herbaceous Ground Covers: Nursery Production and Professional Landscape Maintenance," The University of Tennessee Agricultural Extension Service, , https://trace.tennessee.edu/utk_agexcomhort/31 The publications in this collection represent the historical publishing record of the UT Agricultural Experiment Station and do not necessarily reflect current scientific knowledge or ecommendations.r Current information about UT Ag Research can be found at the UT Ag Research website. This Weed and Insect Management is brought to you for free and open access by the UT Extension Publications at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Commercial Horticulture by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. Agricultural Extension Service The University of Tennessee PB1728 Weed Management in Annuals, Perennials and Herbaceous Ground Covers: Nursery Production and Professional Landscape Maintenance Ornamentals Production and Weeds (PB1728) Weeds Ornamentals Productionand 1 Weed Management in Annuals, Perennials and Herbaceous Ground Covers: Nursery Production and Professional Landscape Maintenance Purpose of Manual The intent of this manual is to assist commercial plant producers and professional landscape maintenance personnel with weed management strate- gies in the production and/or maintenance of annuals, perennials and herbaceous ground covers. This information is not intended for the home gardener. This publication provides information on herbicide options, including ornamental plant tolerance, control of weeds and conditions for optimum herbicidal performance. A large portion of this manual is a summary of the herbicides currently labeled for use on the specifi c plants listed. This compilation provides the user a quick reference to compare and facilitate herbicide decisions. However, this manual is not intended to replace the actual herbicide product label(s). Before using any pesticide, read, understand and follow the actual pesticide product label directions. Herbicides in this manual were registered for the prescribed uses when this manual was printed. However, herbicide labels are constantly being reviewed and revised. Cancellation of the registration of a herbicide or the prescribed use of a herbicide will constitute the removal of the herbicides recommendation from this manual. Use of brand or trade names in this manual is for clarity and information only; it does not imply endorsement of the product to the exclusion of others that may be of similar, suitable composition. It does not guarantee nor warrant the standard of the product. 2 Weed Management in Annuals, Perennials and Herbaceous Ground Covers: Nursery Production and Professional Landscape Maintenance Darren K. Robinson Donna C. Fare Mark A. Halcomb Horticultural Weed Management Specialist Research Horticulturist Area Nursery Specialist and Assistant Professor United States National Arboretum The University of Tennessee The University of Tennessee McMinnville, Tennessee Agricultural Extension Service Plant Sciences McMinnville, Tennessee 3 Table of Contents Introduction Developing a Weed Management Program..................................................................................................................................................................5 Weed Management in the Production Area ......................................................................................................................................................5 Weed Management in the Landscape ...............................................................................................................................................................6 Weed Types and Life Cycles ........................................................................................................................................................................................6 Types of Weeds .................................................................................................................................................................................................6 Life Cycles of Weeds........................................................................................................................................................................................7 Herbicide Types............................................................................................................................................................................................................7 Herbicide Formulations................................................................................................................................................................................................8 Weed Identifi cation.......................................................................................................................................................................................................9 Broadleaf Weeds ...............................................................................................................................................................................................9 Grass Weeds....................................................................................................................................................................................................10 Sedges .............................................................................................................................................................................................................11 Key to Plant Species and Registered Herbicides Table 1. Preemergence Herbicides Registered for Use on Annuals, Perennials and Herbaceous Ground Covers ....................................................12 Table 2. Postemergence Herbicides Registered for Use on Annuals, Perennials and Herbaceous Ground Covers...................................................28 Weed Susceptibility to Herbicides Table 3. Broadleaf Weeds Controlled by Preemergence Herbicides..........................................................................................................................48 Table 4. Grass and Grass-like Weeds Controlled by Preemergence Herbicides ........................................................................................................52 Table 5. Grass and Grass-like Weeds Controlled by Postemergence Herbicides.......................................................................................................55 Herbicide Options: Directions and Precautions Table 6. Preemergence Herbicides: Directions and Precautions ...............................................................................................................................58 Table 7. Postemergence Herbicides: Directions and Precautions...............................................................................................................................64 Table 8. Carrier Volumes, Rain-fast Times and Re-entry Intervals for Preemergence and Postemergence Herbicides ............................................69 List of Annual, Perennial and Herbaceous Ground Covers Table 9. Cross Reference of the Common Name with the Botanical Name ..............................................................................................................72 4 Developing a Weed covered with geo-textile, gravel or a combination to reduce weed establishment. Often it is necessary to treat these areas with a preemergence and/or postemer- Management gence herbicide during non-production periods to control escaped weeds. Program In addition to the production area, roads, aisles, fence rows and ditches Controlling weeds in should be kept clean or mowed frequently to prevent weeds from producing production or landscape areas seed. Neat and clean nurseries generally have fewer weed problems than nurs- can be a burdensome task. The eries with weed infestations close to the production area. objective of an effective and Container media such as pine bark and other amendments should be stored effi cient weed management on a concrete pad on high ground, preferably with a wall on three sides. This program is to achieve the de- reduces weed seed from being washed into the pile or blown in by wind. Pre- sired level of weed control at vent unnecessary vehicle traffi c on the pad. Tires can carry particles of soil or an acceptable expense (cost). mud, which will likely contain weed seed and pathogens. Never allow weeds Labor is very expensive and to grow in the piles of pine bark. Keep the area surrounding the container me- sometimes unavailable, and may require training and supervision. Manage- dia weed-free to prevent weed seed from contaminating the media. ment must avoid the laborious task of physically removing weeds whenever Annuals are generally potted in a commercially prepared, bagged, sterile possible. media and grown start-to-fi