In This Issue
News W anted .............................. 1
Diaprepes Measures ................. 1
Congressman at CREC .................
Dr Knapp Retirenent .......... ...... 2
CREC Shrts For Sale ................... 2
More on Diaprepes .................... 3
TREC Loses Trees To Canker ........4
News From the Staff Meeting ........4
in M ay .......................................... 5
Facility Update Dan Tuzzulo 5
Manuscripts Submitted .................. 5
From Personnel............................. 6
Welcome, Farewell ...................... 6
Upcoming Seminars ...................... 6
Plant Pathologists Mtg
. .... 7
* Dr. Ed Echeverria
Dr. Joe Noling
Dr. Masoud Salyani
Promoted To The
Rank ofProfessor -
Would you like to be a part of
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contributions, ideas and
corrections. Send to Monica
Lewandowski, Ext. 233 or
Editor: Public Relations, Monica
Graphics: Gretchen Baut, Peter
Schmeiser; Production and
Distribution: Word Processing,
Barbara Thompson, Supervisor,
Kathy Snyder, Karla Flynn, Linda
Murphy and Justin Tabb; Customer
Service, Kathy Witherington,
Supervisor, and Nancy Burke.
Institute of Food and Agricullural Sciences
Dr. Harold W, Browning, Center Director
Citrus Research & Education Center
700 Experiment Station Road
Lake Allred. FL 33850-2299
Tel- (863) 956-1151
Fax (863) 956-4631
S May 2001
Volume 19, No. 5
Your News & Accomplisments Wanted!
June is our annual Graduates and Accomplishments Issue! Submit news and/or photographs
on graduation and other accomplishments whether it be about you, your children or
grandchildren, a relative of yours or another CREC employee. We'll be happy to
recognize any news from you and your family graduations, anniversary and
wedding news, special recognition (all grades), baby pictures and personal
accomplishments. The Photo Lab can scan and return photos. Submit to Monica
Lewandowski (E \. 233) or Email: firstname.lastname@example.org by May 18. Ifyou miss this
deadline, please send your news for the July issue.
New CREC Measures To Prevent
Spread of Root Weevil
Precautions For All Personnel; Spring Critical Time
Preventing the spread of the Diaprepes root
weev il and citrus canker was the top issue dis-
cussed at a CREC Cenrerv ide staff meeting on
April 25. The Diaprepes root weevil, a deadly
pest of citrus, ornamentals and several other
crops, has infested CREC groves.
In April, Dr. Pete Timmer issued a centerwide
memorandum that outlined stringent measures
to be followed by all personnel to prevent the
spread of the Diaprepes root weevil (see next
"We have immediate need to make sure we
don't move [Diaprepes]." said Dr. Harold Brown-
ing, Center Direclor. "The industry is challeng-
ing us not to move it into their groves. We have
to be sure we're making every effort not to move
Spring is critical because the peak emergence
of adult insects typically occurs during this time
C RE has
spread of the
of year. "This is the time of year the pupae [in
the soil] start to emerge as adults.' Dr. Brow n-
While the adult insects feed on leaves, the
continued on page 3
A centerwide memorandum outlini g Diaprepes
measures is posted on the bulletin board out-
side the Mailroom. Personnel are also reminded
that canker disinfection/decontamination mea-
sures are still in effect If canker were to be
found on or near Center property a mandatory
eradication or our citrus trees would be devas-
tating loss for our research programs.
To prevent spread of root weevils:
1) Nursern trees, plant material, and soil should
not be taken off station to other citrus groves.
If it is necessary to move nursery trees, they
should be bare-rooted and washed to remove
larvae and the tops trimmed back and the trees
inspected for adults and egg masses.
2) All casual vegetative material and soil should
be removed from the vehicles before leaving
3) If you have been in station groves, you
should hose down vehicles or visually check
the outside, especially the grill for -oot weevils.
Citrus Research and Education Center News and Information
Congressman Putnam at CREC
U.S. Representative Adam Putnam ( District 14) held a Lake
A if red town meeting at CREC on April 11. Putnam addressed
issues such as agriculture, energy, taxes, education and
government reform. Acrowd of35 people, including local
residents, CREC personnel and local citrus growers, had the
-o opportunity to speak to Putnam before and after the meeting.
Putnam represents District 12 in the U.S. House of Repre-
sentatives, which includes much of Polk county, all of DeSoto
and Hardee counties, and protions of Hillsborough. Pasco
and Highlands counties. Elected to Congress in Noseniber,
he is also involved in his family's citrus and cattle business.
Retirement Reception for Dr. Knapp
Dr. Joseph Knapp, Dr. Knapp and .
(left) Professor of his wife, Ann,
Entomology and Citrus have relocated
I PM Extension to Games ille.
April 30. Dr. Herb Nigg to continue
(right) presented Dr. some ongoing H
Knapp with a bagel projects in the
Toaster and cutter, UF Department
expresso machine and of Entomology -
coffee bean grinder, and Nematology.
Dr. Knapp (left) chats with Mike Armstrong. Dr. Knapp's career highlights include
serving as Editor of the Citrus Pest Mangement Guide, the most widely sold L F
II [FAS document in print. Dr. Knapp provided advice to growers and production
managers in Florida and around the world on pest management problems. He also
carried out important field research on IPM materials. He brought growers, scien-
tists and regulator personnel together to battle pests such as citrus leaf miner,
Diaprepes, brown citrus aphid and Medfly. "It hasn't lacked for excitement and new
challenges." said Dr. Knapp. speaking of the invasion of numerous citrus pests and
pathogens during his career.
Vl CREC T-Shirts ($12)
and Golf Shirts ($21)
See Nancy Burke At
The Switchboard For
Colors and To Place An
L-_- ___ -_ -_ Order
Among the party planners at Dr. Knapp's reception.
lef to right: Melissa Rodriguez, Katja Blythe, Jeanette
Barnes, Lance Lewis and Nadine Cuyler.
* 2 *
Diaprepes...from page 1
larvae also feed on the roots. leaving the
tree vulnerable to fungal infection by
Phytophthora. The combination of
Diaprepes and PhYitophlthor is devas-
tating, causing a rapid decline in tree
Dr. Browning pointed out that current
pest management measures will only sup-
press the insect populations, but do not
eradicate the pest.
"Please don't be responsible for mov-
ing the weevil off the Center," said Dr.
Browning, who pointed out that
Diaprepes precautions are not all that dif-
ferent from the mandatory measures cur-
rently in effect for citrus canker.
Other highlights from the Centerwide
meeting can be found on pages 4 and 5.
How Is Diaprepes Spread?
Tiny larvae, eggs hard to detect;
No movement of potted plants off CREC allowed
Native to the Caribbean, the Diaprepes root weevil (Diaprepes abbrevialus) was
first detected in Apopka in the 1960's. It is now spread throughout all citrus grrow ing
regions in Florida, and was recently detected in Texas.
While adult insects can fly and migrate short distances, long-distance movement of
Diaprepes has been facilitated by man. Moving pots of citrus from one location to
another is one of the "easiest" ways to transport Diaprepes. Newly-hatched larvae are
tiny, only 1-2 mm in length, and near impossible to detect in the soil. Eggs, typically
"sandwiched" between two leaf surfaces, are also difficult to spot without careful
For these reasons. the movement of potted plants off CREC is not allowed. If it is
necessary to move nursery trees, they should be bare-rooted and washed to remove
larvae, the tops trimmed back and the trees inspected for adults and egg masses (see
Diaprepes measures, page 1).
Diaprepes Task Force Focuses On
Meeting May 10 in Homestead
The Diaprepes Task Force, led by Bartow grower
Garvie Hall, is a group of citrus growers, regulatory
personnel and researchers that works to educate and
inform citrus growers about the Diaprepes root weevil.
The Diaprepes Task Force also plays an active role in
promoting research and finding ways to improve pest
The next Diaprepes Task Force meeting is May 10 in
Homestead and is open to all interested persons. The
meeting will focus on the Diaprepes problem in other
Florida crops besides citrus.
Place: University ol Florida IF\S Dade County Eilenslon
Office 18710 SW 288' St., Homestead, FL 33030; Tel. (305)
8:30 Introduction, Garvie Hall and Connie R iherd
8.35 Overview of Diaprepes biology. damage, distribution in
South F lorida C. Mannion
8:50 Root crops, D. Seal
9:00 Cover crops, A. Hunsberger
9:10 Ornamentals, Rtherd 'Mlannon Garfolo
9:40 Tropical fruit. J. Pena
10:05 Biological control with parasitoids, D. Amalin
10:15 Biological control with predators, R. Stuart
10:25 Industry input
11:00 Panel discussion of growers and consultants
1:00 pm IOURS (ornamental field nurseries or parasitoid
tearing laboratory) 3 *
Notching on leaf
margins is a sign of
feeding by adult
Several Labs Involved in
Pest Management A Priority
CREC's mulit-disciplinary efforts are focused on both short- and
long-term measures for Diaprepes root weevil management. Its
wide host range (over 250 known species), biology and other
factors make this one of the most difficult challenges facing the
citrus industry. Below is a list of CREC faculty and their laborato-
ries involved in Diaprepes research. Other UF [FAS REC's. USDA
and other agencies are also engaged in the war against Diaprepes.
* Dr. Clay McCoy: Integrated pest management, chemical and non-
chemical measures, root weevil biology.
* Dr. Herb Nigg: Root weevil biology and reproduction, methods
to trap and assess root weevil populations.
* Dr. Larry Duncan: parasitic nematodes as a biological control for
Diaprepes root weevil larvae.
* Dr. Jim Graham: Interaction between Phythophthora and
Diaprepes, short-term (chemical treatments) and long-term
(resistant rootstocks) measures.
* Drs. Jude Grosser. Bill Castle and Fred Gmitter: development of
* Drs. Joe Knapp and Steve Futch: Extension and grower
information and education; Diaprepes monitoring and evaluation
of pest management measures.
UF/IFAS Center in Homestead Loses
Citrus Trees in Canker Eradication
CREC Personnel Urged to Follow Canker Regulations
Dr. Harold Browning urged CREC Personnel
to follow the citrus canker disinfection/
decontamination measures in effect through-
out Florida (see box, right)
The state is currently fighting citrus
canker in seven counties: Dade & Broward,
Palm Beach, Manatee, Hillsborough, Collier
and Hendry Infected trees and exposed
trees within 1900 feet are destroyed by the
Florida Citrus Canker Eradication Program
As of April 20, almost 2 million trees have
been destroyed, including over a million
trees in commercial groves.
Citrus canker was recently detected at the
UF/IFAS Tropical Research and Education
Center in Homestead. Over a thousand trees
on their property were destroyed.
Dr. Browning asked the staff to think
about the grim consequences of finding
canker at CREC "We'd have to remove all of
our trees." he said. To date, citrus canker
has not been detected in Polk County.
More News From the Centerwide Staff Meeting
Dr Browning thanked the CREC staff for
their work, acknowledging their importance
to CREC's programs is widely recognized
' It's amazing to me how much people are
able to [accomplish]," he said.
Recent retirements include Dr Joe Knapp
(Extension Citrus Integrated Pest Manage-
ment and Professor of Entomology), Dr.
Walt Kender (Professor of Horticulture),
Jerry Fojtik (Dr. McCoy's Lab) and Mary
Sirois (Business Office). Currently. there is a
freeze on the hiring of new faculty
ISC Congress 2000
For many, the ISC Congress 2000 is over,
but work continues for many on publication
of the Proceedings The Word Processing
Department is working closely with Editor
Dr. Fred Davies (UF-Ganesville Dept, of
Horticultural Sciences) and numerous
reviewers to prepare the publication for print
by this summer.
Dr. Browning thanked the staff for their
tremendous work. "Probably close to all of
you had a role in that meeting," he told the
staff. "The reason it went so well was the
organization here "
The next ISC Congress will be in 2004 in
Information & Training Seminars
All employees are encouraged to attend
the monthly Information & Training (1&T)
seminar series. Several seminars address
important safety precautions for the work-
place. Suggestions for future seminars are
welcome. Dr. Masoud Salyani is the current
Chairman of the l&T Seminars Committee.
Progress on Facilities, Landscape
Progress on the CREC landscape
continues, with special thanks to the
landscape and grove crews and others that
have helped with the new plantings. The
new landscaping has made a tremendous
improvement in the appearance of the Center.
Employees are reminded to sign in/out
with Security when working after business
hours or on weekends. Call Security at
Extension 211 and provide your name and
location. They are instructed to call the
police if the) encounter someone that they
do not know is authorized to be on CREC
You must also notify Security if you are
checking out a state vehicle after hours or on
weekends. If the guards see a state vehicle
leaving CREC property without their prior
knowledge, they will call the police to report
the vehicle as being stolen.
Performance appraisals must
be signed on or before the due
date designated on the appraisal
Late appraisals will not be
accepted under any circum-
stances. Questions or concerns
should be directed to the CREC
Citrus Canker Info
disinfection procedures are
mandatory for equipment and
personnel working near or
contacting any citrus plants both
upon entry and departure of an
area, regardless of whether an
infestation has been proven to
exist. Info is posted on a bulletin
board outside the CREC
UF/IFAS Citrus Pest Manage-
ment Guide for decomam/
FL Dept. ofAgriculture &
For quarantine maps:
Florida Citru Canker
Winter Havir 800-282-5153
lmnmralu : 941-658-3684
From The Business Office m
Tentative May 18
Important Information For Purchasers
Tentative date: May 18, CREC
CREC Room and Time TBA
The CREC Business Office and LUF Purchasing will discuss
important information regarding P-Card use, purchase requisi-
tions and related information. The workshop is strongly
recommended for all P-card holders (or those who will be
obtaining a P-card) and others who submit purchase requisi-
Beginning July 2001, the P-card may be used for hotel bills,
airline tickets, car rentals and meeting registrations on business-
Other news: UF will soon be instituting on-line training for
Welcome to Dan Tuzzolo, who has joined
CREC's Facilities Operations. Dan's areas of
responsibility include Safety and Security.
Manuscripts Submitted in April 2001
J. P. Michaud. Numerical Response ofOlla v-nigrum (Coleoptera. Coccinellidae) to Infestations ofAsian Citrus Psyllid,
Diaphorini citri, in Florida. Florida Entomologist.
S. D. Sharma and M. Singh. Suscep ibilit. of Herbicide Leaching in Florida Candler Fine Soil. Bulletin ofEnvironmental
Contamination and Toxicology.
J. L. Jifon and J. P. S vertsen. EtTects of Moderate Shade on Citrus Leaf Gas Exchange, Fruit Yield, and Quality. Proceedings of
the Florida State Horticultural Society
J. H. Graham. Varietal Succeptibi lity to Citrus Canker: Observations from Southern Brazil. Curus Industry Magazine.
CREC Faculty Management Committee Changes in Daily Management
A CREC Faculry Management Comminee has been established to provide oversight and problem-solving assistance to the
CREC infrastructure and reduce the involvement of the Center Director in dailt operations. Five faculty are involved in the
Dr. Pete Timmer interacts with the Grove Crew and issues pertaining to the caretaking of CREC groves 'hroughl the Haines
City Citrus Growers Association.
Dr. Jim Syverisen interacts with the Information Support Department on computer and telephone system operations for the
Dr. Bob Braddock interacts with Ken Jacobson and Facilities Operations.
Dr. Larry Duncan coordinates student and teaching activities, assistantships. dorms and other student-related areas.
Dr. Clay McCoy interacts with Jill McDonald and Business Office operations.
According to Dr. Harold Browning, the new management structure allows him to spend more time on issues such as working
on continued investment of resources in CREC, working with the citrus industry and coordinating citrus research efforts within
IFAS as well as on a statewide and national level. He will continue his current involvement in CREC personnel matters and
- NEWS AROUND CREC -
Holiday: Memorial Day
Monday, May 28
A CREC Welcome to ....
David Weaver OPS (Dr. Albrigo)
Cassia Price OPS (B. Nielsen)
Rhonda Schumann Chemist (Dr. Nigg)
Pamela Holderman Fiscal Assistant
Zhang Li OPS (Drs. Chung.Timmer)
Avijit Ray Post-doc (Dr. Brlansky)
Kelly Roland OPS (Dr. Graham)
Travis Roland (Dr. Timmer's lab)
Welcome to Rhonda Schumann, who
will be working with Dr. Herb Nigg.
Rhonda is the wife of Dr. Arnold
* In Memoriam
Sympathy to the family of Carmon
Green, who died in a car accident in
April. Cannon used to work at
CREC in Dr. HerbNigg's lab.
Upcoming Scientific Seminars -
Tuesday, May 15
"Physiological Factors Affecting the Response of Mature
Valencia Orange Fruit to Abscission Chemicals"
Dr. Rongcai Yuan. U F'CREC Post-Doctoral Research Assoc.
BHG Room 1 11 am-12 noon( 10:45. refreshments)
Tuesday, May 22
"Interaction Between Nematodeand Fungal Pathogens of
Citrus Fibrous Roots"
Mr. Fahiem Elborai-Kora, UF/CREC Graduate Student
BHGRoom 1 11 am-12noon (10.45, refreshments)
Tuesday, May 29
"Activity of Benomyl for the Control of Postbloom Fruit Drop
of Citrus Caused by Colletotrichum acutatum"
Ms. Natalia Peres. UF/CREC Visil ing Scienti.l
BHG Room I 11 am-12 noon (I 0.45, refreshments)
Information and Training Seminars -
All employees invited to attend
"General Home and Work Safety"
Mr. Larr Cloud, Chief, Lake Alfred Fire Department
Friday, May 4 I1 am-12 noon
BHG Room I
"Statistics: Understanding the Meaning and Need of Replication"
Dr. Ramon Littel, UF Professor of Statistics
Friday April 13 10 am-12 noon
BHG Rooms 3-4
UF Distance Education Catalogs Available
The UF Distance Education Catalog For Summer and Fall 2001 is now available
The catalog contains a list of UF distance education courses a ailable by interac-
tive videoconferencing, videotaped lectures and the world wide web for academic
course credit, a Professional Master of Agriculture degree and/or credits toward
Print copies of the catalog are available in the CREC library or the in reception
area in Building 24 (Main Reception Desk).
For more information on UF Distance Education, visit: disied.ifas.ufl.eduinfo/
7th Biennial Meeting of the Florida Phytopathological Society
May 8 & 9, 2001
For more information, contact Pete Timmer at CREC or Richard Raid (561)993-1564 or mrnrgnr ifas uil edu Registration is $35 00
Monday, May 7 PM Social (Hosted by Pete Timmer)
Tuesday, May 8
7 30 8 30 am Registration
8:30 am General Session (Invited Speakers)
10:30am- Graduate Student Paper Competition
Florida Disease Updates
12 00 pm- Lunch
1:30- 4:30 pm Concurrent Sessions
Bacterial Diseases (moderated by Dr J. B. Jones) Chemical Control (moderated by Dr. T Kucharek)
Soil-borne Diseases (moderated by Drs. L. E. Datnoff& C. Stiles) Viral Diseases (moderated by Dr. R. Brlansky)
6:00- 7 00 pm Social Hour. 7:00- 9:00 pm Dinner
Wednesday, May 9
7 30 8 00 am Registration
8:00- 11:30 am Concurrent Sssions
Biological and Cultural Control (moderated by E. Rosskopf)
Molecular Plant Pathology (moderated by Dr W. Song)
New and Resurgent Diseases and Diagnosis (moderated by Dr. T Shubert)
11:30-12 noon Short FPS Business Meeting, Adjourn
Citrus Water Summit May 23 at CREC-
A forum to discuss water-related concerns ofthe Flonda citrus industry will be held May 23, 2001 at CREC from 9:00 a.m. -4 30
p.m. Water and environmental issues will be a concern for all Florida citrus growers in the near future. The program is intended to
highlight the requirements and concerns associated with restoration projects and the development of total maximum daily loads
Representatives from the Florida Department of Environmental Protection (FDEP) will outline the TMDL development process
and discuss priority water basins. The need for agriculture to meet water quality TMDL standards and to be involved in the
process by developing and implementing BMPs will be discussed by FD 4CS. Reports will be presented on the progress of the
Indian River and Ridge nitrate BMP development and implementation. In addition, the need for NRCS Conservation Plans and
Nutrient Management Plans, and the mechanisms to develop them will be presented.
Speakers will address the Comprehensive Everglade's Restoration Plan and the Lake Okeechobee Restoration Project and
discuss how these projects will influence citrus production over the next decade. Top officials from St. John's, South Florda. and
Southwest Florida Water Management Districts will present updates on the drought, water restrictions, and engage in a panel
discussion on the role of the districts in environmental concerns of the state The program will conclude with a panel of industry
representatives discussing water and environmental concerns related to the citrus industry.
The meeting is sponsored by UF/IFAS Organizers are Drs. Brian Boman (UF/IFAS Indian River Research and Education
Center) and Larry Parsons (UF/IFAS CREC) For further information, contact Larry Parsons. tel. 863-956- 1151 or E-mail
Irp@lal ufl edu.
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
1 2 3 6 5
Dr. J. Grosser
6 7 8 9 10 11 12
FL. Phytopalh. FL, Phylopath FL Citrus
Mtg May 8-9 Mtg May 8-9 Mutual 9:00
8:30 AM 8:00 AM AM
MTG. 8:30 AM
13 14 15 16 17 18 19
SEMINAR: Exotic Pest of
FL 4-H Agents Dr. Rongcai Citrus Task Force FACULTY
Dist IV. Yuan 9:30 AM MTG.
9:30 AM "Phys... Citrus 8 30 AM
20 21 22 23 24 25 26
CREF Mtg. SEMINAR Statistics
Dr. H. Fahiem EI-Borar Citrus Water Seminar:
Browning Kora Summit Dr. Littell
10:00 AM "Nematodes. 9:00 AM "Replication"
Fungal Path" 1000 AM
27 28 29 30 31 Jun.1
Holiday SEMINAR: SEMINAR:
Memorial atali Peres Carol ht
"Postbloom Fruit Too Safety &
Day Drop 10:45 AM Defensive
1 SEMINAR: Dr. J. Grosser, Somatic Hybrid
Rootstocks Show Promise for Tree Size Control.
BHG Rm 1, 10:45 AM 12:00 Noon.
4- SEMINAR Mr Larry Cloud. General Home and
WorkSafety BHGRm 1, 11:00 AM- 12:00
8 7r Biennial Meeting Florida Phytopathological
Society. BHG 1-4 and Teaching Lab, 7:30 AM -
9 7 Binnial Meeting Florida Phytopthologcal
Society (continued). BHG 1-4 and Teaching
Lab, 7:30 AM 12:00 Noon.
9- SUPERVISORS' MEETING Dr. H. Browning,
Packinghouse Conf Rm. 8:30 AM 10:30 AM.
10- Florida Phytopathologlcal Society BHG Rm
3-4, affiliated group.
10 Florida Citru Mutual Election Mr, W. Boland
BHG Rm 1, 9:00 AM 12:00 Noon.
14 Florid 4-H Agents Dist. IV. Mr. Bill Heltemes.
BHG Rm 4, 9:30 AM 430 PM.
15- IFAS External Relations Committee
Mr Poucher, BHG R. 3-4, 10:00 AM -
15- SEMINAR: Dr. R. Yuan. Physiological Factors
Affecting the Response of Mature Valencia
Orange Fruit to Abscission Chemicals. BHG
Rm 1, 10:45 AM 12:00 Noon.
18- Exotc Pests of Citrus Task Force. BHG Rm 4,
9:30 AM 1:00 PM
17 FACULTY MEETING. Dr. H. Browning, BHG
Rm 4, 8:30 AM 1200 Noon
21 CREF Meeting. Dr H. Browning BHG Rm 4,
10:00 AM 2:00 PM
22 SEMINAR. Mr. F. EI-Bori Kore. Interaction
Between Nematode and Fungal Patnogens of
Citrus Fibrous Roots. BHG Rm 1, 10:45 AM -
23 Citrus Water Summit Dr. L Parsons and Dr. B.
Bowman. BHG Rm 1-2, 9:00 AM 5:00 PM.
25- SEMINAR. Dr. R. Uttel. Statistics
Understanding the Meaning and Need of
Replication BHG Rm 4, 10:00 AM 12:00 Noon.
28 HOUDAY MEMORIAL DAY
29 SEMINAR. Ms. N. Peres. Activity of Benomyl for
the Control of Postbloom Fruit Drop of Citrus
Caused By Coleotrichum aculata BHG Rm 1,
10:45 AM -12:00 Noon.
1 SEMINAR. Ms C. Lehtola Tool Safety and
Defensive Driving. BHG Rm 1, 11:00 AM-