Title: Disease Management
1Disease Management
- Jason Brock
- Department of Plant Pathology
2What happened in 2007?
- Little to no leaf scab or other foliar diseases
- Nut scab did not show up until late summer.
3Avoid this area.
2003 vs. 2007
4Responsive Spray Schedule
- Use extended intervals.
- Use AuPecan.
5AU PECANTRIAL
- Tim Brenneman
- UGA Dept. of Plant Pathology
- Tifton, GA
6Schedules
- Au-Pecan 14 day protection interval
- Au-Pecan 10 day protection interval
- Calendar 2 weeks 3 weeks to mid-Aug
- Calendar 2 weeks to mid-Aug.
- Calendar 2 weeks into Sep.
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8AU Pecan
- www.awis.com
- pecan weather
9Fungicide Selection
- Performance
- Cost
- Resistance Management
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11 DMIs propiconazole Orbit, Tilt,
Propimax, ½ of Stratego, ½ of
Quilt fenbuconazole Enable
12 Strobilurins azoxystrobin Abound, ½ of
Quilt kresoxim-methyl Sovran pyraclostrobin Headl
ine trifloxystrobin ½ of Stratego
13 Strobilurins azoxystrobin ½ of
Quilt kresoxim-methyl Sovran pyraclostrobin Headl
ine trifloxystrobin ½ of Stratego
14Do not use alone. 1-2 applications.
Do not use full season.
If you use a full rate alone, then DO NOT use a
reduced rate later in season.
Do not make more than 3 total applications.
15First Question What to spray for nut scab?
- Post-pollination is the critical period for
protection. - Decide what you want to spray during this time,
and work from there.
16- April/May
- Enable or Propimax
- Headline or Sovran
- Stratego or Quilt
- DMI Tin
June/July Tin or Elast Tin
August Tin or Elast Tin
17- April/May
- Enable or Propimax
- Headline or Sovran
- Stratego or Quilt
- DMI Tin
June/July Tin or Elast Tin
Elast Enable
August Tin or Elast Tin
18June/July Stratego or Quilt
August Tin or Elast Tin
19- April/May
- Headline or Sovran
- Stratego or Quilt
June/July DMI TIN
August Tin or Elast Tin
20A Few More Topics
- Coverage
- Eliminate overcrowding
- Humidity
- Poor coverage
- Reduce stress
- proper fertility
- adequate moisture
21ugapecan.org Information for Growers
22A Few More Topics
- Coverage
- Eliminate overcrowding
- Humidity
- Poor coverage
- Reduce stress
- proper fertility
- adequate moisture
23Questionsor Comments?