dutch trig preventative treatment of american elms against dutch elm disease l.
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DUTCH TRIG ® Preventative treatment of American elms against Dutch elm disease. Presentation setup:. Dutch Elm Disease History and Goals Characteristics How does Dutch Trig ® work The injection Re search and re sults. The problem: Dutch elm disease. Himalayan origin (not Dutch .. )

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Presentation Transcript
presentation setup
Presentation setup:
  • Dutch Elm Disease
  • History and Goals
  • Characteristics
  • How does Dutch Trig® work
  • The injection
  • Research and results
the problem dutch elm disease
The problem: Dutch elm disease
  • Himalayan origin (not Dutch..)
  • Fungal infection, Ophiostoma novo-ulmi
  • Vascular wilt
  • Infection from:
  • Elm bark beetles
  • Root grafts
history dutch trig
History Dutch Trig®
  • 1980: Biological control using bacteria
  • 1989: Discovery of Verticillium protectiveeffect
  • 1991: Development of the Tree injection tool
  • 1992: Full registration in Europe
  • 1995: Introduction USA
  • 1998: Experimental Use Permit
  • 2005: Fully EPA Registered
the goal
The goal
  • Prevent elms from dying
  • Reduceamount of chemicals used
  • Treat large numbers
basic requirements
Basic requirements
  • Biological Control
  • Specialized application tool
the vaccine
The vaccine
  • Verticillium spores in distilled water
  • Common soil organism
  • White variant of Verticillium albo-atrum
  • Produced in the Netherlands
how it works short version
How it works (short version)
  • Inject Dutch Trig
  • Spores germinate
  • Tree reacts
  • Result: Induced resistance
when is dutch trig effective
When is Dutch Trig® effective
  • On healthy elms in areas where DED prevails
  • Injected on a yearly basis, on time application

What endangers effectiveness

Root grafts with diseased trees

Injecting diseased trees

why inject
Why inject
  • Use as little control agent as possible
  • Closed injection system
  • Use Bio-agent directly on targeted tree only
  • Ensure direct uptake by tree
  • Minimal wounding
  • Speed of application
when and where to inject
When and where to inject
  • When: At 25% leaf expansion (May 1-10th)
  • When tree is transpiring
  • Before beetle infection occurs
  • Where: At convenient breast height
  • Every 4 inches circumference
how to inject
How to inject
  • Check for DED signs (on tree and in the area)
  • Push chisel through the bark
  • Pullthe trigger once
  • Twist the gun slightly sideways
efficacy study u of wisconsin
Efficacy study U. of Wisconsin
  • Controlled Greenhouse Study
  • Using ‘Ramets’
  • 4 treatment groups:
  • Water (control)
  • Dutch Trig
  • Dutch elm disease
  • Dutch Trig + Dutch elm disease
  • 17 different clones
  • 2 strains of DED
  • 10 ramets per group
tracking ded infection response

100%

75%

50%

DEDTrace

25%

0%

Tracking DED infection response

Ramet

Cutting

X-section

dutch trig s pathogenicity
Dutch Trig’s Pathogenicity
  • Ulmus americana
  • U. procera
  • U. hollandica
  • U. carpinifolia
  • U. pumila
  • Malus spp.
  • Castanea spp.
  • Prunus serrata
  • Aesculus hippocastanum
  • Viburnum spp.
  • Sorbus aucuparia
  • Magnolia spp.
  • Betula papyrifera
  • Acer saccharum
  • Quercus rubra
  • Crataegus monogyna
  • Acer macrophyllum
  • Cornus nuttallii
  • Prunus lusitanica
  • Rhododendron spp.
  • Fagus spp.
ded control with dutch trig
DED Control with Dutch Trig:
  • + reduce losses (+/- 1%)
  • + yearly check of elm by arborist
  • + affordable
  • + biological, non toxic
  • + fast, safe, easy
  • + active
  • +/- yearly treatment
  • - not effective against root graft infections
  • not curative
  • cooled transport
dutch trig
Dutch Trig®
  • A safe and easy to use biological tool to assist in protecting urban elm populations

Midwest Distribution:

More Info:

www.dutchtrig.com