Constraints to the development of biofungicides: The example of “AQ10”, a new product for controlling powdery mildews

Hofstein, R.; Daoust, Richard A.; Aeschlimann, Jean Paul

doi:10.1007/bf02765797

Cited by 35 publications

(18 citation statements)

References 5 publications

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“…AQ 10, based on the strain AQ 10 of A. quisqualis and commercialized in several countries, parasitizes powdery mildew colonies and is active against several powdery mildews on different hosts (Copping 2004;Hofstein et al 1996;Paulitz and Bélanger 2001). Also AQ 10 is intended for use as part of an integrated disease management programme and is compatible with a wide range of chemicals (McGrath and Shishkoff 1999;Shishkoff and McGrath 2002).…”

Section: Discussionmentioning

confidence: 99%

Efficacy of biocontrol agents and natural compounds against powdery mildew of zucchini

et al. 2011

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Section: Discussionmentioning

confidence: 99%

Efficacy of biocontrol agents and natural compounds against powdery mildew of zucchini

et al. 2011

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“…However, sulfur can cause injury to agricultural workers (Robinson and Pease 1993) as well as to beneficial mites and insects, including natural antagonists of E. necator (Calvert and Huffaker 1974). Sulfur may also contribute to environmental pollution (Hofstein et al 1996).…”

Section: Introductionmentioning

confidence: 99%

An evaluation of biological and abiotic controls for grapevine powdery mildew. 2. Vineyard trials

Crisp

Wicks

Bruer³

et al. 2006

Aust J Grape Wine Res

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Grapevine powdery mildew (Erysiphe necator) affects grape yield and fruit quality worldwide. Managers of conventional vineyards rely mainly on synthetic fungicides and sulfur to control powdery mildew, while in organic vineyards sulfur is the main control agent, often in rotation with canola‐based oils, bicarbonates and biological control agents. The efficacy of those materials has not been evaluated critically under field conditions in Australia. Accordingly, a range of materials showing most promise in previous greenhouse trials (Crisp et al. 2006 Australian Journal of Grape and Wine Research12, pp. 192–202) were assessed via field trials in commercial vineyards. Applications of either milk or whey (alone, or mixed with a canola oil‐based product), as well as applications of potassium bicarbonate (commercial formulation), all reduced the severity of powdery mildew compared with untreated vines. Eight applications of a 1:10 dilution of milk, 45 g/L whey powder or programs comprising rotations of potassium bicarbonate plus oil and whey, applied at 10–14 day intervals, reduced the severity of powdery mildew to levels not significantly different from that on vines sprayed with sulfur (wettable powder, 3–6 g/L). However, the relative control of powdery mildew by the test materials in field trials was dependent on the susceptibility of the grapevine cultivar and the extent of spray coverage achieved. In vineyards where highly susceptible cultivars were planted, and spray coverage was compromised, the resultant control of powdery mildew was reduced; and sometimes to commercially unacceptable levels.

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“…Other biocontrol fungi have also been studied extensively for the same purpose. AQ10 Biofungicide contains the conidia of a strain of a pycnidial fungus, Ampelomyces quisqualis Ces,25 while Sporodex is based on the conidia of a basidiomycetous yeast, Pseudozyma flocculosa (Traquair, L A Shaw & Jarvis) Boekhout & Traquair 3. Integrated management programs were also developed combining the use of some biocontrol agents, such as A quisqualis in grapevine26 and cucumber27, 28 and P flocculosa in rose,7 together with a reduced amount of fungicide.…”

Section: Introductionmentioning

confidence: 99%

A review of fungal antagonists of powdery mildews and their potential as biocontrol agents

Kiss

2003

Pest Management Science

205

122

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There are approximately 40 fungal species that have so far been reported as natural antagonists of powdery mildews or have been tested as their potential biocontrol agents. This review summarizes the published data on their identification, taxonomy, ecology, modes of action and biocontrol efficacy. The results obtained with the two products already registered, AQ10 Biofungicide and Sporodex, are also discussed.

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Constraints to the development of biofungicides: The example of “AQ10”, a new product for controlling powdery mildews

Cited by 35 publications

References 5 publications

Efficacy of biocontrol agents and natural compounds against powdery mildew of zucchini

Efficacy of biocontrol agents and natural compounds against powdery mildew of zucchini

An evaluation of biological and abiotic controls for grapevine powdery mildew. 2. Vineyard trials

A review of fungal antagonists of powdery mildews and their potential as biocontrol agents

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