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BioHerbicides Australia Pty Ltd
An environmentally sustainable way to control trees and shrubs
with encapsulated dry herbicides.
Dr Ken Goulter
• Develop proprietary innovativetechnology
Who are we?
• A small private start-up research and manufacturing company
• Commercialise UQ Di-BakParkinsonia bioherbicide
• to introduce innovative methods to control trees (and shrubs and vines)that are:
economical environmentally safe and safe for operators
Our goal:
Estimated and potential distribution of Parkinsonia aculeata in Australia
Di-Bak Parkinsonia™
Di-Bak Parkinsonia™
• MLA funded project to evaluate field application and efficacy of fungi
• Pharmaceutical capsules found best way to apply inoculum
Novel approach protected by Patent AU2009201231 “Control of Weeds” Diplock, N & Galea,V
Di-Bak Parkinsonia™
Railview Station, Prairie2 years
BHA created with Peter Riikonen (CEO) and Dr Ken Goulter
(staff) and UniQuest on managerial board.• APMA permit application submitted in 2013 • Registration granted Dec 2018. Global first for a
bioherbicide for control of a tree weed.
Basic Technology
• Delivery of agents via a pharmaceutical capsule
Applicator Evolution
Applicator Technology
BHA Capsule Applicator MkIII
Peter Riikonen
Applicator Technology
BHA Capsule Applicator MkIII
Applicator Technology
Applicator Mk IV-
Injecta™
The Magazine
Di-Bak™ Herbicides
• Availability of several herbicides in dry form provided the opportunity to evaluate capsules as a novel meansof controlling trees
BHA Di-Bak Herbicide technology offers agricultural industriesa novel approach for:
• Weed tree control• Plantation Thinning• Wildling control
Di-Bak HerbicidesSolubility in plantae
Imazapyr
Di-Bak Herbicides
Di-Bak G - glyphosate (~350mg ai)
Prickly acacia
Active against:MelaleucaPrickly acaciaCalotropeSydney blue gumDunn’s white gumWestern white gum+ others
Stem
Circumference # of capsules applied
(cm) 1 2 3 4 5 6
0-20 0.01 (n=2)2
21-30 0.0 (n=3) 0.0 (n=3)
31-40 0.1 (n=2) 0.17 (n=2) 0.0 (n=2)
41-50 0.35 (n=6) 0.21 (n=3) 0.01 (n=2) 0.016 (n=5) 0.0 (n=2)
51-60 0.58 (n=4) 0.18 (n=3) 0.01 (n=1) 0.0 (n=2) - 0.01 (n=3)
>61 0.42 (n=1) 0.06 (n=2) 0.18 (n=1)
Relationship of capsule number applied and tree
circumference on tree health at 9MAT.
1.Mean plant health of treated trees as a proportion of healthy untreated trees. 0.0- plants dead to
1.0 plants as healthy as untreated trees. 2. Number of plants assessed in each cohort.
Di-Bak G Tree Weed Control
Chinee Apple Chinese Celtis
Coral Tree
Eucalyptus dunnii
Di-Bak G Plantation Thinning
Eucalyptus dunnii Eucalyptus dunnii
Conventional Thinning
Conventional cut stump treatment
Flashback after
cut stump treatment
Di-Bak Herbicides
Products under evaluation
• Di-Bak herbicide capsules are experimental at present- APVMA R&D Permit “almost’ granted
• PCT patent application lodged• Di-Bak G is presently under APVMA
assessment• Further registrations as efficacy data
accumulated
Di-Bak Herbicides
Products under evaluation
• Di-Bak C - Clopyralid• Di-Bak H – Hexazinone• Di-Bak I – Imazapyr• Di-Bak M – Metsulfuron-methyl• Di-Bak TyP – Triclopyr/Picloram• + any new chemistries
OlivesAsh
Chinese celtisLeucaena
MelaleucaPine
Western White Gum
Opuntia
Sydney Blue gumDunns White GumWillowsSmall Leaf PrivetTobacco Bush
Parkinsonia
Prickly Acacia
Leucaena, Opuntia
LeucaenaGuava
Camphor Laurel
Neem
Di-Bak HerbicidesEvaluation
3 Cardinal rules:
• choose optimal chemistry
• choose optimal dose
• choose optimal placement
Di-Bak C (Clopyralid)
Leucaena
Di-Bak H(hexazinone)
Western white gum
Di-Bak I(imazapyr)
Melaleuca -6 weeks post-treatment
Di-Bak M(metsulfuron-methyl)
Guava
Di-Bak TyP(triclopyr/picloram)
Prickly acacia – 1 month after treatment
Advantages
• Small dose precisely placed in target tree so it is not distributed into the general environment
Advantages
• No escape from target tree – no drift, no flashback
Advantages
• No escape from target tree – no drift, no flashback
Advantages
• No waste – excess capsules back into the bottle
Advantages
• Enhanced chemical stability
Advantages
• Delivered by easy to use applicator - no water, diesel, penetrants or surfactants- no axes - no chainsaws- low PPE
- easy training
Advantages
• Can be used any time of year and in most weather conditions
Comparative Efficiency Study #1
Site: Whian Whian in hinterland of Byron Bay, NSW
Target: Camphor laurel (Cinnamomum camphora)
Conventional treatment: Drill and fill, 2 operators (one to drill and other to inject herbicide solution, use of heavy duty drill required use of power generator and power cord
BHA treatment: 1 operator using Injecta 400
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950
Tota
l Ho
urs
# Trees Treated
Labour Hours
Drill&Fill Labour Hours Di-Bak injection Labour Hours
Labour Used
3.5X
0.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950
Tota
l He
rbic
ide
(kg
)
Herbicide ai Quantity (kg)
Drill&Fill Herbicide QTY (kg) Di-Bak injection herbicide qty (kg)
Herbicide Usage
8.1X
Future Developments
The BHA technology will be evaluated for:Cut Stump treatment
Future Developments
The BHA Injecta technology will be evaluated for applying:
FungicidesInsecticides
Growth Promoters
