Diapositive 1

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Insecticides méligèthes
Europe
Réunion du 18 septembre 2008
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Etat des lieux 2005
résistances
Années 1970
Années 2000
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Avec populations sensibles aux pyréthrinoïdes
?
?
Résistance des méligèthes des crucifères aux
pyréthrinoïdes
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Etat des lieux 2008
résistances
Années 1970
Années 2000
Populations sensibles aux pyréthrinoïdes
?
Résistance des méligèthes des crucifères aux
pyréthrinoïdes
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Rencontre BAYER UFOP-FOP / début 2005
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Soral 2006
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Méligèthes / plante
Témoin
8
Talstar 0.2
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Tal. 0.14 Alanto 0.07
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Tal. 0.07 Al. 0.07 Aud. 0.07
Biscaya 0.4
2
Audienz 0.2
0
J-2 J0 J3
J6
J11
AUDIENZ spinosad (480 g/l)
ALANTO thiachlopride (480 g/l)
BISCAYA thiachlopride (240 g/l)
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chlorpyrifos
100
acetamipride
80
z-cypermethrin
bifenthrin
60
40
20
0
1
2
3
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8
9
DAT
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Resistance of Pollen Beetle (Meligehes aeneus F.)
in Poland Pawel Wegorek, Aleksandra
Obrepalska-Steplowska, Joanna Zamoyska, Katarzyna
Nowaczyk Institute of Plant Protection Miczurina
20, 60-318 Poznan, Poland
The resistance mechanism of surviving beetles
using pyrethroids active substance and
acetamiprid is caused mainly by enhanced
oxidative metabolism (high synergism of
pyrethroid insecticides with piperonyl butoxid
and low with carbaryl and tributylin acetate -
although some symptoms point at insensibility of
nervous tissue in the place of biological
activity of active substance. Positive cross
resistance to chlorpyrifos is probably due to the
creation of the very toxic metabolite of this
active substance under the influence of oxidative
enzyme action. The metabolite (oxidative analogue
of chlorpyrifos) is very strong toxin for PB and
other insects species (Rozanski 1992). However
this conclusion requires further research.