update on new herbicide options for established …update on new herbicide options for established...
TRANSCRIPT
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Update on New Herbicide Options for
Established Alfalfa
Mick Canevari
UCCE Emeritus
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Premium Good Fair
$180/Ton= $150/Ton= $100/Ton=
$1260/Ac $1050/Ac $700/Ac
Avg Yield 7 Tons/A
Weeds Affect Hay Quality
Nov 2016
California Hay Report
+ $560/A + $350/A 0
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Stand loss
Crop stunting
Weeds No Weeds
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Smell, Flavor,
Wild Celery
Mexican Tea
Swinecress
Fleabane
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Poison Hemlock
Fiddleneck
Groundsel
High Nitrates
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1. Crop Rotation
Reduce weed & disease levels
Grains
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Compacted soil
PH & Soil amendments
Laser leveling
Seedbed preparation
Weed management starts before planting.
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Seeding Dates Irrigating up
Rainfall unpredictable Fall planting = Sept/October
Spring planting= March/April
Weed control begins at planting
Conditions that favor fast germination & growth.
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Mechanical
Animal
Chemical
Weed Control Methods
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Sheep Grazing
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1. Gramoxone
2. 2,4D-B
3. Sharpen
4. Shark
5. Roundup
6. Poast
7. Raptor
8. Pursuit
9. Select
10. Velpar
11. Chateau
12. Prowl
13. Karmex
14. Solicam
15. Sencor
Post
Pre
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“PPO herbicides inhibit chlorophyll
development and destroy cell membranes”
• PPO Inhibitors have limited translocation.
• PPO Inhibitors effect mostly broadleaf plants.
• PPO Inhibitors have little activity on grasses.
• PPO Inhibitors are contact & burn plant tissues
within hours.
Shark & Sharpen
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Can we control Quackgrass
Nutsedge
Dodder
Dandelion
Dodder
PPO Herbicide's don't control Perennial Weeds
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Gramoxone 14 DAT
Chateau 14 DAT
Shark 7 DAT
Sharpen
7 DAT
PPO herbicides burn foliage
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Post Emergence- Weeds up but small.
Burns broadleafs on contact- Not systemic.
No soil residual- Crop rotation issues
Labeled dormant & growing season use.
Some yield loss between cuttings.
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Shark
7 days after application
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Alfalfa Shark Tolerance Trial
Application Between Cuttings
2015
0 5 10 15 20 25
Shark EW 2.0 oz + Herb Activator
Shark EW 1.0 oz + Herb Activator
Shark EW 2.5 oz + Activator 90
Shark EW 2.0 oz + Activator 90
Shark EW 1.0 oz + Activator 90
UTC
Height 11DAT Height 17DAT Height 24DAT
MICK CANEVARI
UCCE EMERITUS
SAN JOAQUIN
COUNTY
Rate: Prod/A.
Appl: 5-15-15 Activator 90 @ 0.25%
V/V; Herbicide Activator @ 1.0%
V/V.
INCHES
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Alfalfa Shark Tolerance Trial
Application Between Cuttings
2015
1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000
Shark EW 2.0 oz + Herb Activator
Shark EW 1.0 oz + Herb Activator
Shark EW 2.5 oz + Activator 90
Shark EW 2.0 oz + Activator 90
Shark EW 1.0 oz + Activator 90
UTC
1936
2168
2031
1988
2143
2556
YIELD 24DAT
A
b
b
b
b
b
LSD P=.05
MICK CANEVARI
UCCE EMERITUS
SAN JOAQUIN
COUNTY
Rate: Prod/A.
Appl: 5-15-15 Activator 90 @ 0.25%
V/V; Herbicide Activator @ 1.0%
V/V.
LB/Acre
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Sharpen™ Herbicide
• Burndown Chemistry– PPO Inhibitor, Group 14
Control of many toughest broadleaf weeds –
• GROUNDSEL & FLEABANE
Fast and Complete • Controls broadleaf weeds fast
• Not effective on controlling grasses
• Excellent when utilized as a tank mix
partner with soil residual herbicides in
established alfalfa.
Active Ingredient saflufenacil
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amaranth spp.
beggarticks, hairy
beggarweed, Florida
bindweed, field*
buckwheat, wild
canola, volunteer
carpetweed
chamomile, mayweed
chickweed, common
cocklebur, common
cockle, corn
copperleaf, Virginia
cowcockle
dandelion*
devil’s-claw
eclipta
eveningprimrose, cutleaf
filaree spp.
fleabane, hairy
galinsoga
groundcherry, cutleaf
groundsel, common
jimsonweed
knotweed, prostrate
kochia
lambsquarters spp.
lettuce, prickly
mallow, Venice
marestail/horseweed
melon spp.
morningglory spp.
mustard spp.
nettle, burning
nightshade spp.
purslane, common
pennycress, field
pigweed spp.
prickly sida/teaweed
puncturevine
ragweed, common & giant
rocket, London
sesbania, hemp
shepherd’s-purse
smartweed spp.
sowthistle spp.
spurge spp.
sunflower, common
tansymustard spp.
thistle, Canada*
thistle, Russian
velvetleaf
waterhemp spp.
willowweed
*Control of seedling stage and suppression of perennial growth stage
Performance may vary depending upon growth stage
Sharpen™ Herbicide Broadleaf Weeds Controlled
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Sharpen 2 fl oz +Velpar 32 fl oz + Prowl H2O
3 qts Velpar 32 fl oz
50 Days after application
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0 10 20 30 40 50 60 70 80 90 100
Sharpen+Gramoxone+Prowl H2O .045+.5+1.9
Sharpen+Velpar .045+.5
Sharpen+Prowl H2O .045+1.9
Sharpen+Gramoxone .45+.5
Chateau .128
Gramoxone SL .5
Sharpen .0445
Groundsel Fleabane Burning Nettle
Rate: lbs ai/A.
Application: 12-9-15
% Control 90 DAT
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SHARPEN
Untreated 7 days after application
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Shark & Sharpen Trial ALFALFA WEED CONTROL 2017
0
20
40
60
80
100
120
Shark 2.5 oz Sharpen 1.0 oz Sharpen 2.0 oz
Groundsel Shepherds Purse Chickweed An Bluegrass Fleabane
%
Lodi Calif applied 12-6-2016
14 DAT
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Sharpen & Shark will control Roundup tolerant weeds
Fleabane
Malva
Nettle Purslane
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“The best weed control
is still a healthy stand of alfalfa”
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Good Luck in 2017