adjusting herbicide programs to emerging weed problems in peanut
Download
Skip this Video
Download Presentation
Adjusting Herbicide Programs to Emerging Weed Problems in Peanut

Loading in 2 Seconds...

play fullscreen
1 / 16

Adjusting Herbicide Programs to Emerging Weed Problems in Peanut - PowerPoint PPT Presentation


  • 108 Views
  • Uploaded on

Adjusting Herbicide Programs to Emerging Weed Problems in Peanut. Eric P. Prostko Extension Weed Specialist University of Georgia. Why do “new” weed problems occur?. reliance on herbicides decreases in cultivation ecological shifts herbicide resistance.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Adjusting Herbicide Programs to Emerging Weed Problems in Peanut' - henriette-angel


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
adjusting herbicide programs to emerging weed problems in peanut

Adjusting Herbicide Programs to Emerging Weed Problems in Peanut

Eric P. Prostko

Extension Weed Specialist

University of Georgia

why do new weed problems occur
Why do “new” weed problems occur?
  • reliance on herbicides
  • decreases in cultivation
  • ecological shifts
  • herbicide resistance
new or unique weed problems in peanuts
New or Unique Weed Problems in Peanuts
  • tropic croton
  • dayflower/spider-wort
  • eclipta
  • copperleaf
  • spiderflower
  • redweed
  • ALS-resistant pigweed
tropic croton croton glandulosus
Tropic Croton (Croton glandulosus)
  • 3rd most troublesome weed
  • Cadre is weak
  • not as competitive as other weeds
  • PRE - Valor or Strongarm
  • POST - Ultra Blazer
  • Cadre/Blazer tank/mixes???
dayflower spiderwort commelina spp
Dayflower/Spiderwort (Commelina spp.)

Asiatic

  • Berrien, Brooks, Grady, Thomas
  • limited data
  • Roundup is weak
  • PRE - Dual (timing)
  • POST - Basagran
  • others????

spreading

spiderwort

residual spiderwort control in peanuts with dual magnum brooks county ga

8

7.6

6

Plants/ft2

4

2

2.2

0

Dual

No Dual

Residual Spiderwort Control in Peanuts with Dual Magnum, Brooks County, GA

a

b

Dual Magnum @ 1 pt/A Applied: July 2, 2001 Rated: August 1, 2001

eclipta eclipta prostrata
Eclipta (Eclipta prostrata)
  • low, moist areas
  • limited biology data
  • PRE - Strongarm, Valor, Dual, Outlook
  • POST - Basagran, Storm, Tough
  • timing is critical
eclipta control in peanuts with post herbicides

100

80

60

2" or less

Control (%)

3-5"

40

20

0

Storm

Cadre

Blazer

Tough

2,4-DB

Basagran

Herbicide

Eclipta Control in Peanuts with POST Herbicides

Grichar, 1997

hophornbeam copperleaf acalypha ostryifolia
Hophornbeam Copperleaf (Acalypha ostryifolia)
  • Randolph, Terrell
  • limited biology data
  • PRE - Valor or Strongarm
  • POST - Ultra Blazer, Storm
spiderflower cleome spp
Spiderflower (Cleome spp.)
  • Laurens County
  • limited data
  • PRE - Pursuit
  • POST - Pursuit, Cadre, Ultra Blazer (bloom stage)
redweed melochia corchorifolia
Redweed (Melochia corchorifolia)
  • low, moist areas
  • hard seed coat
  • season long germination
  • PRE - Strongarm, Valor, Zorial
  • POST - Basagran, Storm, Cadre
als resistant palmer pigweed
ALS-Resistant Palmer Pigweed
  • Burke County
  • 2001
  • do not use Cadre, Pursuit, Classic, Strongarm
  • Prowl, Sonalan, Dual, Valor, Ultra Blazer, Storm
summary
Summary
  • Newer soil applied herbicides will help control some of the unique weed problems.
  • Combinations of PRE and POST treatments will provide consistent control.
  • Need more information about biology and competitiveness of newer weed problems in order to make better control decisions.
slide16

University of

Georgia

Extension

Weed Science

(gaweed.com)

ad