Quarantine Imminent For ACP Finds
By Patrick Cavanaugh
Edited By Laurie Greene
|Concerned Growers Listen intently for further Instructions.|
Nearly 300 growers, PCAs and
others with an interest in the California citrus industry gathered at the
Heritage Complex Auditorium in Tulare today as nearly 178 square miles, representing 21,520 acres of citrus, sits waiting
for the establishment of a quarantine following the trapping of six Asian
Citrus Psyllids (ACPs) in mid June in Porterville.
There was apprehension and
somber anticipation in the audience as the industry prepares for the largest
quarantined area to be established in the San Joaquin Valley citrus orchards,
where 10,800 jobs are directly related to citrus.
Citrus is a $2 billion
industry in California, with about 80 percent of the entire California Citrus
industry in the San Joaquin Valley. In Tulare County alone, the citrus industry
is valued at $768 million on 119,000 acres.
This meeting was one of the
most important meetings ever held in Tulare County regarding the ACP, which
Marilyn Kinoshita, Tulare County Agricultural
Commissioner, assured those in attendance that the quarantine is still pending
as of July 30, but it will be imposed and remain in place until two complete,
pest-free years elapse. In other words, if another psyllid is trapped in
August, the two years will start again.
Victoria Hornbaker, program manager, CDFA/Citrus
Pest & Disease Prevention Committee presented a history of on ACP and HLB
stating that it was first detected in Florida in 1998 and California in 2008.
She explained that the invasive pest can spread HLB which is deadly to citrus
trees and incurable.
“Our citrus pest and disease prevention program
consists of detection, trapping, visual survey, delimitation trapping,
treatment and quarantines,” Hornbaker said.
Hornbaker noted that the pending state and federal
quarantine will affect growers, packing houses, haulers and others within five
miles around the recent ACP finds in the Porterville area. He said the
quarantine will be established to prevent the spread of ACPs within the
quarantine area and from known infested (quarantined) areas to outside the
Quarantine area, i.e., the rest of the state and beyond.
Nawal Sharma, CDFA Environmental Program Manager,
presented more details about the upcoming quarantine.
“If you are outside the five mile area, you do not
need to do anything different, as the regulations do not apply to you,” Sharma
“We have identified about 11 packing houses within
the five-mile area. This does not mean, ‘Stop your business.’ If you are a
grower within the quarantine area and are shipping to one of the packinghouses
within the quarantine area, there is absolutely no impact on you. The reason is
that the regulations allow moving the fruit along with leaves and stems within
the quarantine area.”
“Now if a grower inside the quarantine area intends
to ship to packinghouse outside the quarantine area he must make certain that
all fruit is free of stems and leaves,” said Sharma. “The fruit then must be
cleaned with a particular machine with rollers before it can leave a quarantine
Transporters of fruit from a quarantine area to
packinghouses outside the quarantine area must be in compliance, as are the
Beth Grafton-Cardwell, IPM Specialist and Research
Entomologist, Department of Entomology, UC Riverside, spoke about the psyllid treatment
options in the quarantine area.
She instructed that it is important to stay
proactive with effective insecticide treatments within the quarantine area.
“Apply two ACP-effective materials with different modes of action as soon as
possible after ACP detection, starting with one from the broad spectrum group,”
Grafton-Cardwell explained. “The best treatment combination is a foliar
pyrethroid (Baythroid, Danitol, Tombstone, or Mustang), plus a systemic
neonicotinoid (Admire Pro or generic imidacloprid, or Platinum).
“Apply the foliar first for rapid knockdown and the
systemic close to the same time since it takes time for uptake into the tree,”
“Use a systemic only if it will be effective with a
proper irrigation system, soil type and appropriate timing for good uptake
(June-October),” she said.
She noted that growers should be vigilant in
scouting trees for ACP. She said the current protocol is to sample 10 trees
each on the north, east, south and west borders of the orchard, plus in the
center for a total of 50 trees. “The psyllid prefers borders and so the focus
is on the outside edges of orchards,” she said.
Grafton-Cardwell described the Tap Sampling, Visual
Sampling and Flush Sampling methods.
She shared a new website http://www.ucanr.edu/sites/acp that
will explain all control protocols including details on management strategies,
sampling, chemical control and sample costs for the growers’ budget.
Finally, Ken Keck, president of the California Citrus Research Board (CRB), made a sobering point to growers. Keck is the former executive director of the Florida Department of Citrus and a current citrus grower in Florida. "My grove is heavily infected with
HLB. I feel like the ex-con in front of a room with 17-year olds. So don’t
make the mistakes that we made in Florida. You know the Florida and Texas
experience, so the stage that the Central Valley is in right now is to Prevent,
“It would be a tremendous mistake if the experiences
of Texas and Florida did not help increase California’s motivation to deal with
this pest and hopefully never [have to deal with] the disease,” Keck said.
“We all need to take this very seriously and stay on
the prevention programs. We need all boots on the ground to get after this
problem,” stated Keck. “There is hope that we can keep HLB from infecting
commercial orchards in California because of the grower’s quick and united action,” Keck said.
Labels: ACP Trapping, ACP Tulare, Beth Grafton-Cardwell, CDFA, CRB, HLB, Ken Keck, Marilyn Kinoshita, Nawal Sharma, Porterville, quarantine, Victoria Hornbaker