Product update weed and brush control . C . K. Rice, Extension Agronomist

1. Product update weed and brush control.C. K. Rice, Extension Agronomist Read and follow all Label recommendations before using pesticides.

2. Lots of the same old products! • 2,4-D amine • 2,4-D ester • Weedmaster • Grazon P+D • and generics • Remedy • Reclaim • Tordon • Velpar • Spike • Banvel • and generics There are many other products that are mixtures of these in some form or fashion.

3. Pasture Broadleaf Weeds. My Picks = the cheapest thing that will do the job. Grass release is the goal! 2,4-D amine 2,4-D LV Ester 2,4-D + Dicamba 2,4-D + Picloram Cimarron Max

4. The Old Standby. • 2,4-D • Basis for most of the broadleaf pasture weed control products. • If it’s gonna be cheap, and work against 90% of the broadleaves out there, its gonna have 2,4-D in it. • When annual broadleaves and western ragweed are small and actively growing, 2,4-D will do the job by itself.

5. Amine? LV? Ester? • Amine = salt = less volatile = less active • LV = low volatile ester = more active. • Be carefull with esters around sensitive crops! • 1.5 pints/ac – amine • 1.5 pints/ac –Lv4 • 1 pint/ac – Lv6

6. Do Nothing Herbicide only Herbicide should only be used in pastures as a rescue treatment! 100#N + P + K 100#N + P + K and 2,4-D

7. Weed control only pays dividends if it results in grass release. A lot of weeds = water loss, nutrient loss, and shading.

8. A few weeds will not affect grass yields! The grass release will not pay for the herbicide.

9. pH 5.6 N 3 P 15 (72%) K 348 Treatments Applied April 26, 2006, Harvest was taken July 7, 2006

10. Advantages For Products Other Than 2,4-D • Weeds too large • Weeds are stressed (drought) • Some hard to control species • Comparable cost • Remember Good Timing Saves Money

11. Surfactant. • Add 1 quart of surfactant per 100 gallons of mix if: • Droughty conditions. • Weeds are large. • If weeds have a silver or gray cast – Hairy leaves and stems: Lanceleaf ragweed, doveweed. • If weeds have fine, fern like leaves: sneezeweed, broomweed. Check the label for the recommended surfactant for the herbicide you are using!

12. “NEW” Pasture Products I Get Questions About?

13. Cimarron Plus • Metsulfuron Methyl 48% + Chlorsulfuron 15% • Ally + Glean • Weak on ragweeds, Does well on most of the annual broadleaves. • I would only recommend it by itself for areas around crops sensitive to phenoxy. Or for specific weed problems like buttercup, mullen, and bull thistle. • This product can be hard on seedling grasses, and established grasses such as fescue and bahia grass.

14. Cimarron Extra • Metsulfuron Methyl 30% + Chlorsulfuron 37% • Ally + Glean • Weak on ragweeds, Does well on most of the annual broadleafs. • I would only recommend it by itself for areas around crops sensitive to phenoxy. Or for specific weed problems like buttercup, mullen, broom snakeweed and bull thistle. • This product can be hard on seedling grasses, and established grasses such as fescue and bahia grass.

15. Cimarron Max • Metsulfuron Methyl .75% + Dicamba 12.25% + 2,4-D 35.25% (all by weight). • Rate I : Excellent all around pasture weed control product. • Rate II : Dewberry, Broom Snakeweed(fall), thistles, sericealesp. • This product can be hard on seedling grasses, and established grasses such as fescue and bahia grass.

16. Milestone • Aminopyralid 40.6% • Close cousin of picloram, not as long of residual and not restricted use. • Works well on seedling broadleaf weeds in pastures, but is a little weaker with some of the perennials. • My suggestion would be to use the Grazon Next, unless pasture is close to a sensitive crop.

17. GrazonNext • Aminopyralid 6.58% + 2,4-D 51.6% • Not restricted use like P+D. • Works similar to P+D on most pasture weeds. • Seems to have better activity on solanum Sp. than P+D. • Weaker on brush species and sericea than P+D. • Shorter residual.

18. Pasturall • Aminopyralid 1.5% + 2,4-D 51.6% • Low rate of Aminopyralid, makes it cheaper than Grazon next. • Not restricted use like P+D. • Marketed as having the kick of an ester with out the volitility. • Should work on most annual pasture weeds. • Shorter residual.

19. Brush Herbicides! • Kill the easy stuff first! Broadcast applications. • Hard to beat triclopyr (remedy) • Has activity on a large number of our common brush species. • Brush control is a long term endeavor. • Work on the hard stuff as individual treatments or with more expensive specialty herbicides. • Picloram (Tordon), hexazinon(velpar), Dicamba(Banvel) and tebuthiuron(spike)

20. Old standby brush herbicides. • Most recommended broadcast application. • 1 quart of remedy + 1 quart of Tordon. • Remedy • Velpar • Tordon • Spike • Little cheaper and almost as good. • 3 pints remedy + 1 pint of Tordon. • Most recommended soil applied. • No liscense needed. • Liquid: • Velpar – honey locust, elm, Blackberry, oaks • Pellets: • Spike – sandy soils – oak and elm • Most recommended soil applied. • Private applicators liscence needed. • Liquid: • Tordon – honey locust, elm, BLK berry, oaks, cedar

21. Surmount • Picloram 13.25% + Fluroxypyr 10.65% • Tordon + Starane • Good to excellent activity on many woody plant species. • Gives some of the better control I have seen on persimmon with a broadcast application. • Research on prickly pear control indicates this is one of the better solutions, although slow, 2-3years. • Gives good control of many of the pasture weed problems, although more expensive than some other choices.

22. Pasturegard • Triclopyr 25% + Fluroxypyr 8.6% • Remedy + Starane • Good to excellent activity on many woody plant species. • Excellent on SericeaLesp. • Gives good control of many of the pasture weed problems, although more expensive than some other choices.

23. Grassy Weeds? Is the cost of the cure worth the added value of the product?

24. Outrider or Maverick • Sulfosulfuron • Johnsongrass, yellow and purple nutsedge control in established bermuda and bahiagrass pastures. • Also labeled for cheat and downey brome control on pastures west of the Miss. On many natives, bermuda and bahia.

25. Pastora • Now have a full label for Pastora herbicide. • Nicosulfuron56.2% +Metsulfuron Methyl 15.0% • Accent + Ally • Rate:  1 to 1.5 ounces/ac; maximum of 2.5 onces per year • Timing: Bermuda is less than 4 inches in height following spring green up and germinated sandburs are apparent. The label also suggest that applications can be made for sandbur control after the first cutting of hay. • PHI:  No grazing or haying restriction • Pastures and hay meadows (no rangeland) • Bermudagrass varieties:  All, but must be an established stand • Being marketed for the control of Johnsongrass and field sandbur in bermudagrass. • Also has activity on bahia, and on many summer and winter annual weeds and grasses.

26. Prowl H2O • Rate:  1.1 - 4.2 qts/ac; maximum of 4.2 qts per year • Timing:  Anytime during winter dormancy and prior to weed germination • PHI:  60 days prior to harvest for hay; 45 days prior to grazing/harvest for forage • Pastures and hay meadows (no rangeland) • Bermudagrass varieties:  All, but must be an established stand • Activation:  1" of precipitation ideal prior to weed germination • Pendimethalin38.7% • Sandbur control in Bermuda grass. • Apply before sandburs are up. • Should also control most germinating annual grasses.

27. Summary • There is very little new chemistry out there in pasture and rangeland!!!!! • Most of the “NEW” products are re-packaged products from other crops.