USE PATTERNS FOR AMINOCYCLOPYRACHLOR
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1 USE PATTERNS FOR AMINOCYCLOPYRACHLOR Brent Sellers and Sarah Lancaster Range Cattle Research & Education Center
2 Outline 1. Aminocyclopyrachlor overview 2. Application methods, rates 3. Species of concern controlled 4. Results of ACP research 5. Use considerations
3 Aminocyclopyrachlor -MAT 28 -MAT -AMCP -ACPC -ACP
4 Aminocyclopyrachlor -New class of herbicides - Pyrimidine carboxylic acid -Control of broadleaf weeds, trees and brush, vines, and some grasses in rights of ways, natural areas -Low use rates -Moderate persistence in environment - Low toxicity to mammals, birds, fish
5 Aminocyclopyrachlor Products Perspective premix with chlorsulfuron premix with metsulfuron premix with metsulfuron and imazapyr Images from dupont.com
6 Other products -Plainview - Non-crop market - Premix with chlorsulfuron and suflometuron -Range and pasture products - Perspective R&P - Premix with chlorsulfuron - Invora - Premix with triclopyr - Rejuvra - Premix with metsulfuron
7 Other products -Imprelis - Professional turfgrass market - Recently removed from the market due to tree sensitivity issues -Considered ester formulations
8 Synthetic auxin herbicides -Oldest synthetic organic herbicides -Foliar and root absorption -Affects plant growth regulation -Multiple targets within plant -Moderate risk of resistance -Symptoms in days -Limited grass activity
9 ALS-inhibiting herbicides -Relatively new herbicide family -Foliar and root absorption -Affects amino acid production -Reduces enzyme activity -High risk of resistance -Symptoms in 1-2 weeks -Selectivity varies by chemical
10 Allowable uses -Terrestrial sites -Uncultivated areas - agricultural and non-agricultural -Industrial sites -Natural areas
11 Targeted uses Product Perspective Targeted use areas roadside rights of way native grass restoration utility and roadside rights of way utility rights of way
12 Turfgrass tolerance of Perspective -Rate dependent tolerance: -Bahiagrass -Bermudagrass -No tolerance -St. Augustine
13 Application methods -Foliar application -Ground equipment low and high volume -Helicopter (in rights of way only) GPA -Cut stubble application -Spot application
14 Use rates Product Minimum use rate Maximum use rate Perspective 39.5% aminocyclopyrachlor % chlorsulfuron 39.5% aminocyclopyrachlor % metsulfuron-methyl 31.6% imazapyr % aminocyclopyrachlor + 7.3% metsulfuron 1.75 ounces per acre 0.35 ounces per 5 gal 1.75 ounces per acre 0.35 ounces per 5 gal 13 ounces per acre 2.6 ounces per 5 gal 11.0 ounces per acre 2.2 ounces per 5 gal 11.5 ounces per acre 2.3 ounces per 5 gal 20 ounces per acre 4.0 ounces per 5 gal
15 Adjuvants -MSO* % v/v -NIS % v/v (Perspective) % v/v -COC % v/v (Perspective and )
16 Labeled Species Perspective scouring rush bull thistle Scotch thistle cogongrass seedhead suppression
17 Labeled Species bull thistle dogfennel/yankeeweed poison ivy firewheel Old World climbing fern Scotch thistle scouringrush St. Johnswort bahiagrass
18 Labeled Species blackberry bull thistle Chinese tallow dogfennel/yankeeweed poison ivy Japanese honeysuckle Kudzu Old world climbing fern Scotch thistle scouringrush sowthistle St. Johnswort bahiagrass
19 RESEARCH RESULTS
20 Stand reduction (%) Bahiagrass Tolerance DAT 60 DAT Perspective 2.4 oz Perspective 4.75 oz Perspective 9.5 oz Data from J. Ferrell
21 Perspective 9.5 oz/a 60 DAT
22 Defoliation (%) Climbing fern 30 DAT BC B-D BC AB 4.5 oz 7.5 oz 9.5 oz Perspective 2.75 oz CD Perspective 4.75 oz BC Perspective 7.5 oz A Invora 36 oz/a B Escort 1 oz/a E Nontreated * Similar letters indicate similar means (P < 0.05)
23 Defoliation (%) Australian pine 120 DAT A 0 A AB A AB AB AB AB B AB AB B 7.5 oz 9.5 oz 11.5 oz 9.5 oz + Krenite 4 qt * Similar letters indicate similar means (P < 0.05) 13 oz 16.5 oz 20 oz 13 oz + Krenite 4 qt Invora 36 oz Garlon 3 qt Nontreated
24 Australian pine 120 DAT 7.5 oz/a 13 oz/a
25 Defoliation%) Brazilian pepper 90 DAT AB AB AB B AB AB A 7.5 oz 9.5 oz 11.5 oz 13 oz 16.5 oz 20 oz Rodeo 3 qt + Arsenal 3 qt C Nontreated * Similar letters indicate similar means (P < 0.05)
26 Brazilian pepper 90 DAT 11.5 oz/a 20.0 oz/a
27 Injury (%) Melaleuca 90 DAT A A AB A A AB A A A A B 7.5 oz 9.5 oz 11.5 oz 9.5 oz + Krenite 4 qt 13 oz 16.5 oz 20 oz 13 oz + Krenite 4 qt Invora 36 oz Rodeo 3 Nontreated qt + Arsenal 3 qt * Similar letters indicate similar means (P < 0.05)
28 Control (%) Sweetgum 12 MAT - Spot Spray oz + fozamine 48 oz 9.5 oz + fosamine 64 oz 9.5 oz + fosamine 96 oz 9.5 oz + Roundup 4 qt/a 13 oz + fosamine 48 oz 13 oz + fosamine 64 oz 13 oz + fosamine 96 oz 13 oz + Roundup 4 qt * Data from J. Ferrell
29 Control (%) Oak 12 MAT oz 9.5 oz + fosamine 48 oz 9.5 oz + fosamine 64 oz 9.5 oz + fosamine 96 oz 9.5 oz + RoundUp 4 qt 16.5 oz 16.5 oz + fosamine 48 oz 16.5 oz + fosamine 64 oz 16.5 oz + fosamine 96 oz 16.5 oz + RoundUp 4 qt * Data from J. Ferrell
30 Control (%) Palmetto 12 MAT oz 9.5 oz 11.4 oz 13 oz 16.5 oz 20 oz Garlon 4 qt * Data from J. Ferrell
31 Lantana Herbicide Rate 6 months 12 months Vista (fall) Vista (fall/spring) Vista + Milestone (fall) Vista + Milestone (fall/spring) Perspective (fall) Perspective (fall/spring) % control pt pt pt + 7 fl oz 2.6 pt + 7 fl oz oz oz * Data from J. Ferrell
32 8 MAT Perspective 7.7 oz/a fall + spring Perspective 7.7 oz/a fall
33 Control (%) Spanish needle 4 MAT Perspective 2.5 oz Perspective 4.8 oz Milestone 3 fl oz Milestone 5 fl oz 2,4-D 1 qt/a * Data from J. Ferrell
34 Control (%) Matchstick weed 4 MAT oz Perspective 4.8 oz Milestone 3 fl oz Milestone 5 fl oz 2,4-D 1 qt * Data from J. Ferrell
35 Perspective 4.75 oz 60 DAT
36 Control (%) Cogongrass 92 WAT B A AB ACP 0.25 lb ACP + Imaz 0.3 lb A ACP + Imaz 0.6 lb B A ACP + Gly 1.5 lb AB ACP + Gly 3.0 lb A Imazapyr 0.6 lb AB Glyphosate 3.0 * Similar letters indicate similar means (P < 0.05) Data from A. Greis
37 Invasive grasses Greenhouse* Species I 50 (lbs ACP/acre) I 90 (lbs ACP/acre) Paragrass 0.1 > Max label rate West Indian marshgrass > Max label rate > Max label rate Torpedograss > Max label rate > Max label rate Cogongrass lb ACP/acre = 8 oz/a of Perspective or *Based on dry weight of plant regrowth 4 weeks after clipping (8 weeks after treatment). Data from A. Greis
38 Suggested Plant Back Restrictions Species I 50 Plant Back Time* lb ACP/acre days Chalky bluestem ** 0 Spreading panicum Purple lovegrass Longleaf pine Wiregrass Live oak Goldenrod >365 Blazing star *** >365 *Based on 90 day half life of ACP applied at 0.25 lb/a ** no injury observed *** injury observed at all rates evaluated *Data from A. Greis
39 SPECIAL CONSIDERATIONS
40 Not labeled for aquatic applications!
41 Herbicide drift Isreal, Rhodes, Wszelaki
42 Herbicide drift -Restrictions listed on label -Coarse droplets -Low nozzle height -Winds less than 10 MPH
43 Movement in soil -Heavy rainfall -Wet soils -Root uptake by non-target plants
44 CONCLUSIONS
45 A new herbicide chemistry -Plant growth regulating mode of action -Three premixed products -Perspective,, -Labeled for use in non-cropland
46 Controls broadleaf weeds and brush -Oak, palmetto, lantana good control > 1 YAT -Climbing fern, Brazilian pepper, melaleuca, Australian pine early results promising -Expect transient injury to bermudagrass and bahiagrass
47 Cautions -Take care to avoid drift! Futch, Salyani, Sweeb
48
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