TPM/IPM Weekly Report
for Arborists, Landscape Managers & Nursery Managers
Commercial Horticulture
In This Issue...
- Tick activity
- Ambrosia beetles
Degree Days
Special Alert - March 11, 2016
Coordinator Weekly IPM Report:
Stanton Gill, Extension Specialist, IPM for Nursery, Greenhouse and Managed
Landscapes, sgill@umd.edu. 301-596-9413 (office) or 410-868-9400 (cell)
Regular Contributors:
Pest and Beneficial Insect Information: Stanton Gill and Paula Shrewsbury
(Extension Specialists) and Nancy Harding, Faculty Research Assistant
Disease Information: Karen Rane (Plant Pathologist) and David Clement
(Extension Specialist)
Weed of the Week: Chuck Schuster (Extension Educator, Montgomery County)
Cultural Information: Ginny Rosenkranz (Extension Educator, Wicomico/
Worcester/Somerset Counties)
Fertility Management: Andrew Ristvey (Extension Specialist, Wye Research &
Education Center)
Design, Layout and Editing: Suzanne Klick (Technician, CMREC)
Deer (Black-legged) Tick Activity
By: Stanton Gill
IPMnet
Integrated Pest
Management for
Commercial Horticulture
extension.umd.edu/ipm
If you work for a commercial
horticultural business in the
area, you can report insect,
disease, weed or cultural
plant problems found in the
landscape or nursery to
sklick@umd.edu
The early spring warm weather has
brought deer ticks (black-legged tick)
out of their winter blues. They are out
and attaching themselves to people.
I had a couple of phone calls and 3
emails reporting deer tick activity
in nurseries. Workers are finding
ticks crawling up their boots and on
their legs. When working in areas at
edges of woods, edges of tall trees
in the nursery, or areas of tall grass,
be sure to check yourself regularly
for the presence of deer ticks. The
deer tick has to feed for several hours With this week’s unseasonably warm
weather, ticks are active
to transmit Lyme disease so rapid
removal is your best course of action.
Deet will provide some protection and can be applied to clothing or skin.
Labeled Permethrin sprays can be applied to clothing and allowed to dry
before putting them back on to protect against ticks. You can buy clothing
already treated with permethrin and there are several brand name outdoor
clothing lines that advertise as pretreated to deal with ticks.
Ambrosia Beetles
By: Stanton Gill
We received several calls this week asking about ambrosia beetle activity with the warm weather. I placed out
an alcohol Lindgren trap last Friday at CMREC. I have checked it each evening, and so far, there has been no
activity. I will give you an update next week. If it gets warmer and rain occurs over the weekend, we may see
flight activity after the rain. Peremetrhin or Bifenthrin can be applied to trunks of susceptible trees when we see
adult activity.
Degree Days (As of March 10)
20162015 2016
2015
Baltimore, MD (BWI) 52
1
Dulles Airport 44
0
Frostburg, MD 28
0
Martinsburg, WV
40
2
National Arboretum/Reagan Natl
61
6
St. Mary’s City
71
5
Salisbury 70
11
To check degree day (DD) accumulations in your local area go to:
http://www.yourweekendview.com/outlook/agriculture/growing-degree-days/. Note: degree days reported in this newsletter use a base temperature of 50 °F, a start date
of January 1st, and the date of monitoring as the end date.
CONTRIBUTORS:
Stanton Gill
Extension Specialist
sgill@umd.edu
410-868-9400 (cell)
David Clement
Plant Pathologist
clement@umd.edu
Paula Shrewsbury
Extension Specialist
pshrewsb@umd.edu
Andrew Ristvey
Extension Specialist
aristvey@umd.edu
Karen Rane
Plant Pathologist
rane@umd.edu
Ginny Rosenkranz
Extension Educator
rosnkrnz@umd.edu
Chuck Schuster
Extension Educator
cfs@umd.edu
Nancy Harding
Faculty Research
Assistant
Thank you to the Maryland Arborist Association, the Landscape Contractors Association of MD, D.C. and VA, the
Maryland Nursery and Landscape Association, Professional Grounds Management Society, and FALCAN for your
financial support in making these weekly reports possible.
Photos are by Suzanne Klick or Stanton Gill unless stated otherwise.
The information given herein is supplied with the understanding that no discrimination is intended and no
endorsement by University of Maryland Extension is implied.
University of Maryland Extension programs are open to all citizens without regard to race, color, gender,
disability, religion, age, sexual orientation, marital or parental status, or national origin.