Oceans and Atmosphere Sharon Hook Senior Research Scientist 2 August 2016 Modern use pesticides SharonHookcsiroau 2 Organophoshate pesticides malathion parathion diazinon ID: 615430
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Slide1
Could modern use pesticides impact prawn hatcheries?
Oceans and Atmosphere
Sharon Hook| Senior Research Scientist
2 August 2016Slide2
Modern use pesticides| Sharon.Hook@csiro.au
2
|Organophoshate pesticidesmalathion, parathion, diazinon
, chlorpyrifos, ethionInhibit acetylcholinesterase
Human and environmental health concerns
Used in horticulture and agriculturalPyrethroid
pesticides
b
ifenthrin, cypermethrin, esfenvalerate, permethrinAlter nerve repolarization Arthropods are more sensitiveResidential -Termites and ant controlNeonicotinoid pesticidesclothianidin, imidacloprid, nithiazine, thiacloprid Inhibit nicotinic acetylcholine esterase activitySpecific to arthropodsUsed in sugarcane, horticulture, pest controlSlide3
3
|
R. Turner, DSITI, unpublished data
Modern use pesticides| Sharon.Hook@csiro.au
Townsville
Neonicoinoid
:
Imidaclorprid
concentrationsSlide4
4
|
How toxic are these compounds?
Data from Smit et al., 2015 Human and Ecological Risk Assessment 21:1608-1630
Modern use pesticides| Sharon.Hook@csiro.auSlide5
5
|
How toxic are these compounds?Data from Smit et al., 2015 Human and Ecological Risk Assessment 21:1608-1630
Modern use pesticides| Sharon.Hook@csiro.au
?
Toxicity as survival
Imidaclorprid
concentration
ug
/LSlide6
6 |
What about changes to feeding rates?
Lethality
Stops feeding (no recovery)decreases feeding (animal recovers)
270 μg/L
30 μg/L
0.8
μ
g/L
Modern use pesticides| HookAbout 10x lessAbout 40x less
Amphipod
crustaceanSlide7
7 |
Could these compounds be hurting prawn hatcheries?
What concentrations affect larval prawns? Imidacloprid,
fipronil, bifenthrin, chlorpyrifos Survival Behavioural changes (especially feeding)
What concentrations are found in farm intake water? Farmers will collect water samples
Analysed for a broad suite of pesticides (mixture effects)
Compare risk levels to intake water concentrations
Modern use pesticides| Sharon.Hook@csiro.au
Experimental
PlanSlide8
Oceans and Atmosphere
Sharon HookSenior Research Scientist
t +61 2 9710 6839e Sharon.Hook@csiro.au
Agriculture and FoodMelony SellarsSenior Research Scientistt
+61 437 025 821e
Melony.Sellars@csiro.au
CSIRO
Thank you
Land and Water
Anu KumarGroup Leadert +61-8-8303 8597 e Anupama.Kumar@csiro.au