Dutch trig preventative treatment of american elms against dutch elm disease
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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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Dutch trig preventative treatment of american elms against dutch elm disease l.jpg

DUTCH TRIG®Preventative treatment of American elms against Dutch elm disease


Presentation setup l.jpg
Presentation setup:

  • Dutch Elm Disease

  • History and Goals

  • Characteristics

  • How does Dutch Trig® work

  • The injection

  • Research and results


The problem dutch elm disease l.jpg
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 l.jpg
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 l.jpg
The goal

  • Prevent elms from dying

  • Reduceamount of chemicals used

  • Treat large numbers


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Basic requirements

  • Biological Control

  • Specialized application tool


The vaccine l.jpg
The vaccine

  • Verticillium spores in distilled water

  • Common soil organism

  • White variant of Verticillium albo-atrum

  • Produced in the Netherlands


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How it works (short version)

  • Inject Dutch Trig

  • Spores germinate

  • Tree reacts

  • Result: Induced resistance



When is dutch trig effective l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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


Slide14 l.jpg

Dutch TrigTree injector


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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 l.jpg

100%

75%

50%

DEDTrace

25%

0%

Tracking DED infection response

Ramet

Cutting

X-section







Dutch trig s pathogenicity l.jpg
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 l.jpg
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 l.jpg
Dutch Trig®

  • A safe and easy to use biological tool to assist in protecting urban elm populations

Midwest Distribution:

More Info:

www.dutchtrig.com


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