FLORIDAForests - Spring/Summer 2017 - 21

FEATURE

2017 FLORIDA
SOUTHERN PINE BEETLE
FORECAST
By CHRISTOPHER PEARCE, Survey Coordinator
and ANTHONY AYERS, SPB Forester

A PHEROMONE TRAP survey was
conducted in March 2017 as part of
an ongoing program to monitor the
populations of Southern Pine Beetle
(SPB) and its associated predators. The
purpose is to provide an early-season
prediction of the potential level of SPB
activity in select Florida counties and
identify areas that may be at increased
risk for an outbreak. The results of the
2017 survey indicate that SPB populations levels are high and increasing in
many counties in the northeastern part
of the state.
BACKGROUND
The Southern Pine Beetle is one of
the most destructive forest pests in the
southern United States. Since 1995, the
Florida Forest Service (FFS) has participated in an annual statewide Southern
Pine Beetle (Dendroctonus frontalis, or
SPB) spring trapping survey. This survey monitors numbers of adult SPBs
and their clerid predators captured in
pheromone-baited flight traps during
the SPB primary spring dispersal phase.
The results are used as an early-season
prediction of SPB population trends and
activity levels, allowing forest managers to identify areas of potential SPB
activity in advance of aerial detection
flights. The survey also provides data
for monitoring SPB population levels
from year to year.

Southern Pine Beetle (Dendroctonus frontalis)
Length=204mm

METHODS
The 2017 Florida survey was conducted
using from one to three traps (Lindgren
funnel traps baited with alpha- and betapinene and the SPB aggregation pheromones frontalin and endo-brevicomin) in
each of the 38 counties. Each trap was
located in a different stand of susceptible forest type. Endo-brevicomin lures
were added to all traps for the first time
this year to boost attractiveness to SPB
adults, thereby increasing trap catches
and prediction accuracy (based on previous research). The 38 counties surveyed included those that are most likely
to experience SPB problems based on
historical outbreaks and/or their relative
abundance of loblolly pines.
As in previous years, effort was made
to place traps in stands containing sawtimber size loblolly pine or areas where

Florida Forests 21 Spring/Summer 2017

loblolly pine is most abundant. Traps
were distanced at least 40 feet from
any pine tree and checked weekly by
FFS foresters in March. Numbers of
SPBs and their clerid beetle predators
(Thanasimus dubius) were counted for
each of the four weekly collections per
trap. Numbers of SPB/trap/day and
the %SPB were then applied to the
Modified SPB Prediction Chart model
(Ron Billings, Texas Forest Service)
to provide a forecasted level of SPB
activity for the remainder of the year.
Forecasted activity was based on a relative scale of low, moderate, high, or
outbreak.
RESULTS AND DISCUSSION
The 2017 survey results predict elevated levels of SPB activity throughout
much of Region 2. Districts 6 and 7 had
trap results forecasting high and outbreak levels of SPB activity in seven of
the traps deployed. Much of the SPB
activity in 2016 was in District 6 and
District 7, and there is a high probability that continued activity will be similar if not greater for 2017. The Forest
Health section is recommending continued early aerial surveillance flights
for these areas.
Other counties outside of District 6
and District 7 that had high and increasing trap counts include Calhoun, Dixie
and Alachua counties. The Saint Johns



Table of Contents for the Digital Edition of FLORIDAForests - Spring/Summer 2017

Executive Outlook
President’s Message
Wildland Fires on the Rise
William Cook Inducted Into AG Hall of Fame
2017 Legislative Report
Forestry Day at the Capitol
Putting the Action in Political Action
Taxing Matters
An Audience With the President
2017 Florida Southern Pine Beetle Forecast
UF Sfrc Welcomes Terrell Baker
Snapshots
Products & Services Marketplace
Index of Advertisers/ advertisers.com
FLORIDAForests - Spring/Summer 2017 - Intro
FLORIDAForests - Spring/Summer 2017 - cover1
FLORIDAForests - Spring/Summer 2017 - cover2
FLORIDAForests - Spring/Summer 2017 - 3
FLORIDAForests - Spring/Summer 2017 - 4
FLORIDAForests - Spring/Summer 2017 - 5
FLORIDAForests - Spring/Summer 2017 - Executive Outlook
FLORIDAForests - Spring/Summer 2017 - President’s Message
FLORIDAForests - Spring/Summer 2017 - 8
FLORIDAForests - Spring/Summer 2017 - Wildland Fires on the Rise
FLORIDAForests - Spring/Summer 2017 - William Cook Inducted Into AG Hall of Fame
FLORIDAForests - Spring/Summer 2017 - 11
FLORIDAForests - Spring/Summer 2017 - 2017 Legislative Report
FLORIDAForests - Spring/Summer 2017 - 13
FLORIDAForests - Spring/Summer 2017 - Forestry Day at the Capitol
FLORIDAForests - Spring/Summer 2017 - Putting the Action in Political Action
FLORIDAForests - Spring/Summer 2017 - 16
FLORIDAForests - Spring/Summer 2017 - Taxing Matters
FLORIDAForests - Spring/Summer 2017 - 18
FLORIDAForests - Spring/Summer 2017 - An Audience With the President
FLORIDAForests - Spring/Summer 2017 - 20
FLORIDAForests - Spring/Summer 2017 - 2017 Florida Southern Pine Beetle Forecast
FLORIDAForests - Spring/Summer 2017 - 22
FLORIDAForests - Spring/Summer 2017 - UF Sfrc Welcomes Terrell Baker
FLORIDAForests - Spring/Summer 2017 - Snapshots
FLORIDAForests - Spring/Summer 2017 - 25
FLORIDAForests - Spring/Summer 2017 - 26
FLORIDAForests - Spring/Summer 2017 - 27
FLORIDAForests - Spring/Summer 2017 - Products & Services Marketplace
FLORIDAForests - Spring/Summer 2017 - 29
FLORIDAForests - Spring/Summer 2017 - Index of Advertisers/ advertisers.com
FLORIDAForests - Spring/Summer 2017 - cover3
FLORIDAForests - Spring/Summer 2017 - cover4
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