Post on 12-Aug-2020
transcript
Building an effective, quality
psyllid control program for
your grove
Michael E. Rogers1, Philip A. Stansly2, Lukasz L.
Stelinski1, Jackie K. Burns1, Dan L. Gunter3, Tom
Turpen3, Richard Gaskalla4, Rusty A. Noah4, Paul A.
Mears4, Matthew Albritton4, and Mike W. Sparks5 1 University of Florida, IFAS, Citrus Research & Education Center, 2 Southwest
Florida Research & Education Center, 3Citrus Research and Development
Foundation Inc., 4 Florida Department of Agriculture and Consumer Services, 5
Florida Citrus Mutual
Psyllid Control (What we know)
• Chemical Controls
– What does and doesn’t work
• Application Methods
– Airblast, low volume, aerial applications
• Psyllid Biology
– Lifecycle, movement, pathogen transmission
1.24 miles
0.75 miles
Block of 200 trees sprayed with protein mark
Traps placed in radial fashion at distances from 0.06 miles to 1.24 miles away from sprayed area
Traps were collected 12 days after spray application and psyllids were tested for the marker protein
Lukasz L. Stelinski, CREC
Mph
Wind Speed
Avg. Daily Wind Directions
Central sprayed area
Red x’s indicate where the majority of marked psyllids were trapped
Lukasz L. Stelinski, CREC
Comparable levels of HLB infection in abandoned and managed groves
0
0.2
0.4
0.6
0.8
1
1.2
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Perc
ent
of
trees
infe
cted
Abandoned Commercial
Abandoned Commercial Perc
ent
of
psyl
lids
in
fect
ed
Lukasz L. Stelinski, CREC
0
20
40
60
80
100
June July August
0
2
4
6
8
June July August
Have confirmed that psyllid dispersal from abandoned into managed citrus
moves the HLB pathogen M
ean
num
ber
of
psyl
lids
mov
ing
Tot
al n
umber
of
infe
cted p
syllid
s Less than 1% of psyllids captured were positive
in these trials
Developing Citrus Health
Management Areas
Michael E. Rogers1, Philip A. Stansly2, Lukasz L.
Stelinski1, Jackie K. Burns1, Dan L. Gunter3, Tom
Turpen3, Richard Gaskalla4, Rusty A. Noah4, Paul A.
Mears4, Matthew Albritton4, and Mike W. Sparks5 1 University of Florida, IFAS, Citrus Research & Education Center, 2 Southwest
Florida Research & Education Center, 3Citrus Research and Development
Foundation Inc., 4 Florida Department of Agriculture and Consumer Services, 5
Florida Citrus Mutual
What is a CHMA?
• Citrus Health Management Area
• A grower defined grouping of citrus
acreage where grower participants
coordinate psyllid control efforts (year-
round pesticide applications) and
management of pesticide resistance
development (coordinated rotation of
MOA’s)
Success Story
• Gulf Coast Citrus Growers Association
• UF-IFAS-SWFREC (Phil Stansly)
• Citrus Health Response Program (CHRP)
• UF-IFAS Hendry County Extension Service
• Area-wide dormant applications
– 30+ groves
–~70,000 acres treated
Success Story
0
2
4
6
8
10
12
14
16
0.4Pre-
Treatment(Oct-Dec
08)
0.64Post-
Treatment(May 09)
0.21Pre-
Treatment(Oct 09)
0.19Post-
Treatment(May 10)
0.9Pre-
Treatment
15.1Post-
Treatment
2009 2010 Untreated (2009)
Me
an
No
. A
CP
per
tap
Phil Stansly, Alejandro Arevalo and Mongi Zekri;
Citrus Industry Magazine October 2010 (more details)
Why develop CHMA’s ?
• Slow the spread of HLB
– Improve psyllid control***
• Prolong the usefulness of our current
management tools
– Pesticide resistance***
• Preserve current citrus grove acreage
• Facilitate adoption of new technology to
better manage HLB
CHMA Participants
• Citrus Growers
– Must be a grower driven program
• No mandates
• Voluntary participation
• Growers motivate neighboring growers to
participate
– Facilitated by local industry leader(s)
• Organize local CHMA planning meetings
• Work with other non-grower participants (IFAS,
FDCAS, etc…)
CHMA Participants • UF-IFAS
– Serve as an information resource for
developing plans of action
• Extension specialists (entomology, horticulture,
pathology, etc…)
• Extension county agents
– Provide infrastructure to facilitate grower
communication of activities and results
• Development of website for each CHMA
• Email listserv notifications
• County agent printed newsletters
CHMA Participants
• FDACS – Division of
Plant Industries
– Support provided by
personnel from the
regional CHRP offices
• GIS mapping of defined
CHMA’s
• Routine psyllid monitoring
of CHMA’s
Steps in CHMA Establishment
• Growers request assistance
– Contact should be made with CHMA coordinator
(Currently contact local IFAS Extension County Agent)
• Planning meeting(s)
– Identify groves to participate in a CHMA
– FDACS aids in providing mapping assistance
– IFAS specialists assist in planning management program
for upcoming season
– Follow-up meetings as needed to finalize plan or to
motivate more participation
CHMA Planning Meeting Topics for discussion
• Defining the CHMA
Area
– Growers / Extension
County Agents assist in
delineating areas
– Based on presence and
grouping of groves in
region
CHMA Meeting Goals Topics for discussion
• Developing a plan of action
– Timing and Frequency of applications
• Coordinate as many sprays as possible
– Pesticide rotation schedules
– Application methods
– Grower practices / limitations
• MRL’s for processed vs fresh fruit
• Organic groves
– Abandoned groves
– Residential areas (dooryard trees)
Tracking Progress / Measuring
Success
• Weekly scouting to asses psyllid
populations
– Before and after pesticide applications
– When to retreat?
• Identify hot spots and measures needed to
minimize psyllid spread
• Continually updated tracking / reporting
(website)
Key Roles
• CHMA Statewide Coordinator
– Liaison between CHMA team leader, UF-IFAS,
FDACS-DPI and grower organizations
– Assist CHMA team leaders with meetings and
CHMA communications
– Until position is filled (if filled) will be facilitated by
county agents
UF-IFAS Role
• IFAS Specialists
– Aid in development of management plans based
on latest research
• IFAS county Agents
– Provide assistance in planning within their regions
• IFAS Extension Assistant
– Maintain website communications for each CHMA
– Analyzes and updates psyllid scouting reports from
FDACS-DPI maintained on IFAS-hosted website
FDACS-DPI Role • GIS mapping services
– Provide updated maps for each CHMA
• Psyllid scouting
– Collect data on psyllid population to track
success and identify trouble areas
How will CHMA’s Function?
CHMA
CHMA (team
leader)
CHMA statewide
coordinator
UF-IFAS FDACS-DPI
Program
planning Psyllid
scouting
Scouting reports
CHMA news
updates
CHMA
website
Effective Psyllid Control Putting it all together
CHMA
Ap
plic
atio
n
meth
od
s
Grower
participation
Developing CHMA’s (Final thoughts)
With our current tool box, developing
CHMA’s are the closest thing we have to a
“silver bullet”…no psyllids, no pathogen
spread
Don’t wait for the next “silver bullet”…it
may come too late!
CHMA
Developing CHMA’s (Final thoughts)
• Talk to your neighbors
• Call your county agent