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Control of Hard to Manage Weeds along Highway Rights-of-Way
http://edis.ifas.ufl.edu/ ( Publisher's URL )
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Permanent Link: http://ufdc.ufl.edu/IR00001338/00001
 Material Information
Title: Control of Hard to Manage Weeds along Highway Rights-of-Way
Physical Description: Fact Sheet
Creator: Ferrell, Jason A.
Langeland, Kenneth A. (Kenneth Arthur) 1947-
Publisher: University of Florida Cooperative Extension Service, Institute of Food and Agriculture Sciences, EDIS
Place of Publication: Gainesville, Fla.
Publication Date: 2010
 Subjects
Subjects / Keywords: Herbicides -- Florida
Weeds -- Control -- Florida
Roadside Plants -- Florida
Genre:
Spatial Coverage:
 Notes
Abstract: Table listing herbicide, rate, and comments for several upland invasive weeds.
Acquisition: Collected for University of Florida's Institutional Repository by the UFIR Self-Submittal tool. Submitted by Diana Hagan.
Publication Status: Published
General Note: "Original publication date September 2007. Revised November 2010."
General Note: "SS AGR 275."
 Record Information
Source Institution: University of Florida Institutional Repository
Holding Location: University of Florida
Rights Management: All rights reserved by the submitter.
System ID: IR00001338:00001

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SS AGR 275 Control of Hard to Manage Weeds along Highway Rights-of-Way1Jason Ferrell and Ken Langeland2 1. This document is SS AGR 275, one of a series of the Agronomy Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date September 2007. Revised November 2010. Visit the EDIS website at http://edis.ifas.u.edu 2. Jason F errell, associate professor, Agronomy Department; Ken Langeland, professor, Agronomy Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611. The use of trade names in this publication is solely for the purpose of providing specic information. UF/IFAS does not guarantee or warranty the products named, and references to them in this publication does not signify our approval to the exclusion of other products of suitable composition. All chemicals should be used in accordance with directions on the manufacturers label. The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or aliations. U.S. Department of Agriculture, Cooperative Extension Service, University of Florida, IFAS, Florida A. & M. University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Millie Ferrer-Chancy, Interim DeanTable 1. Control of upland invasive weeds Herbicide Rate Comments Cogongrass Glyphosate (Roundup Pro, etc) 4 to 8 pt/A or 3 to 5% solution Cogongrass is most sensitive to glyphosate when applied in the fall. Spring applications are less eective. Mowing existing vegetation and treating the regrowth approximately 2 weeks later is often best. Multiple applications are often required before complete control is achieved. Arsenal or Arsenal Powerline* BASF Corp 64 oz/A or 1% solution Cogongrass is most sensitive to arsenal when applied in the fall. Spring applications are less eective. Mowing existing vegetation and treating the regrowth approximately 2 weeks later is often best. Arsenal is more eective on cogongrass than glyphosate, but expect total vegetation control and bare ground for 2 to 4 months after application. DO NOT apply Arsenal over the root zone of desirable hardwood trees. Multiple applications are often required before complete control is achieved. Tropical Soda Apple Garlon 4 Ultra 1 qt/A or 0.5% solution for spot application A broadcast application of Garlon 4 is eective on TSA if applied near blooming or after regrowth from mowing. Applications made in late summer months or while fruiting are less eective. Garlon 4 has no soil residual activity and recolonization from seed is likely to occur after application. If spot-spraying, it is important to achieve full coverage. The Organo-auxin rule must be obeyed when using this herbicide.

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2 Herbicide Rate Comments Milestone VM 5 to 7 oz/A or 0.1% solution for spot application A broadcast application of Milestone VM is eective on TSA at any growth stage or time of year. Mowing is not necessary to improve control. Milestone VM has signicant soil residual activity and control of seedlings is likely to occur for over 6 months after application. If spot-spraying, it is important to achieve full coverage. The Organo-auxin rule must be obeyed when using this herbicide. Brazilian Pepper or Chinese Tallow Garlon 4 10%-25% diluted in oil Basal bark or cut-stump application, rate will depend on applicator technique and site conditions, e.g. soil water content. Pathnder II or Remedy RTU Undiluted Basal bark application Garlon 3A 50 100% Cut stump application. Apply herbicide immediately after felling. Garlon 3A 0.50-1.5% Brazilian pepper only. Foliar application. Use sucient volume to ensure thorough coverage. Escort XP 1-2 oz/acre Kudzu Escort XP* 3-4 oz/A Apply Escort XP when kudzu is actively growing for optimum control. Several hardwood species are sensitive to Escort XP at these rates, so do not use for kudzu control if application to desirable hardwoods cant be avoided. Milestone VM 7 oz/A Milestone VM is eective on kudzu and many other legume species (including mimosa and lead trees). One application will rarely control old-growth kudzu, but Milestone VM is safe on most hardwood species. Transline* 5 to 21 oz/A Transline should be applied from late summer through fall for optimum control. For small populations that are not well established, lower application rates are acceptable. For larger, more mature stands, the maximum application rate should be used. Transline is safer on hardwood species than Escort XP. Mature stands of kudzu will require multiple applications of transline. Transline is only labeled for use in select counties in North Florida. See product label for specics. The Organo-auxin rule must be obeyed when using this herbicide. Air Potato Glyphosate (Roundup Pro, etc) 1 2% solution Glyphosate gives good control when applied late season, such as August-October. Early-season applications may require repeat treatments, and applications made after plants begin yellowing result in limited control. Desirable vegetation under air potato may not be damaged when lower rates of glyphosate are used. Removal of bulbils from the ground will aid long term control. Climbing ferns Lygodium Escort XP* 1 2 oz/A or 2 oz/100 gallon Apply Escort XP or glyphosate to all live fronds for best results. Treatment of Lygodium often results in non-target damage due to the climbing nature of these species. In long-established stands of Lygodium, re-treatment will be required in < 6 months due to re-sprouts and new fern growth from spores. If not included in the product, an appropriate NIS surfactant at 0.5% v/v should be added to the herbicide solution. For fronds growing high in trees, cut at waist level and treat remaining rooted fronds. Glyphosate (Rodeo, Roundup Pro, etc) 7.5 pints/A or 2% solution denotes products not currently found on the DOT bid list. Transline is only labeled for use in specic counties in Florida.

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3 Table 2. Aquatic Vegetation Control Herbicide Rate Comments Cattail Habitat*BASF Corp 32 oz/A Surfactant required: 0.5% v/v NIS or 1% v/v MSO Apply to actively growing cattails in the spring, summer, or fall DO NOT apply in the root zones of desirable hardwood vegetation. Do not apply to irrigation water The addition of an approved aquatic surfactant is required. Clearcast*BASF Corp 64 oz/A Surfactant required: 0.5% v/v NIS or 1% v/v MSO Apply to actively growing cattails in the spring, summer, or fall Can be used in the root zones of desirable hardwood vegetation. Refer to current label for irrigation and watering restrictions. The addition of an approved aquatic surfactant is required. Glyphosate (Rodeo, Accord Concentrate, etc.) 7.5 pt/A or 0.75 -1.5% solution Fall applications are most eective. The addition of an approved aquatic surfactant is required. Alligator weed Habitat* BASF Corp 32 oz/A Surfactant required: 0.5% v/v NIS or 1% v/v MSO Apply to actively growing alligator weed in the spring, summer, or fall. DO NOT apply in the root zones of desirable hardwood vegetation. Do not apply to irrigation water Clearcast* BASF Corp 64 oz/A Surfactant required: 0.5% v/v NIS or 1% v/v MSO Apply to actively growing alligator weed in the spring. For summer and fall applications, add glyphosate 32 oz/A. Can be used in the root zones of desirable hardwood vegetation. Refer to current specimen label for irrigation and watering restrictions. Glyphosate (Rodeo, etc)0.75-1.5% solution Repeat applications will be necessary. Addition of approved surfactant is necessary. Renovate 3-8 qt/acre or .75-1.0% solution Repeat treatments will be necessary, especially to oating mats. Additional surfactant may improve performance. Water Hyacinth 2,4-D amine* 2-4 qt per acre or 0.5-1.0% solutionRefer to specic product label to ensure that the 2,4-D brand used is labeled for aquatic weed control. Refer to label for water use restrictions. Reward 0.5-2.0 gal/acre or 0.5% solutionAddition of an approved surfactant is essential. Refer to label for water use restrictions. Glyphosate (Rodeo, etc)5-6 pints per acre or 0.75-1.0% solutionAddition of an approved surfactant is essential. Refer to label for water use restrictions. Visual symptom are not observed until over three weeks after application. Water Lettuce Reward 0.5-1.0 gal/acre or 0.5 to 1.0% solutionAddition of an approved surfactant is essential. Stingray 3.4-13.5 oz/acre Addition of an approved surfactant is necessary. Torpedograss Glyphosate (Rodeo, etc.)2-3% solution Torpedograss control will be improved when maximum leaf surface is exposed above the water line. Regardless of herbicide or application rate, multiple applications will be required for complete control. The addition of an approved aquatic surfactant is required. Habitat 1% solution denotes products not currently found on the DOT bid list. Transline is only labeled for use in specic counties in Florida.