Annals of Applied Biology (2008) 152, 301-305

J.D. Tobin, P.P.J. Haydock, M.C. Hare, S.R. Woods and D.H. Crump (2008)
The compatibility of the fungicide azoxystrobin with Pochonia chlamydosporia, a biological control agent for potato cyst nematodes (Globodera spp.)
Annals of Applied Biology 152 (3), 301-305
Abstract: The biological control potential of Pochonia chlamydosporia against root-knot (Meloidogyne spp.) and cyst-forming (Heterodera and Globodera spp.) nematodes is widely appreciated. In spite of this, little has been undertaken to determine the compatibility of this fungus with modern fungicides. A series of experiments were undertaken to investigate the effect of azoxystrobin on P. chlamydosporia. Initial Petri dish experiments found a significant reduction in the growth of P. chlamydosporia. EC₅₀ values were calculated at 7 and 14 mg L⁻¹, respectively, for hyphal growth and chlamydospore germination. A microcosm experiment based on counts of the colony-forming units of the re-isolated fungus showed a reduction in EC₅₀ values for azoxystrobin in soil after 12, 20 and 40 days incubation (1.25, 1.00 and 3.00 mg kg⁻¹ soil, respectively). There was evidence the fungus recovered over time in response to azoxystrobin application. This was also demonstrated in a glasshouse experiment where EC₅₀ values of 1.32 and 4.4 mg kg⁻¹ soil were obtained for 35 and 49 days after planting (DAP), respectively.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Patrick P.J. Haydock, Martin C. Hare

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Globodera pallida
Pochonia chlamydosporia (antagonist)	Globodera pallida