Department of Employment, Economic Development and Innovation Elio Jovicich Chrys Akem Gerry MacManus Downy mildew Powdery mildew Anthracnose EFFICACY OF FUNGICIDE ALTERNATIVES FOR MANAGING POWDERY AND DOWNY MILDEWS ON CUCURBITS EFFICACY OF FUNGICIDE ALTERNATIVES FOR MANAGING POWDERY AND DOWNY MILDEWS ON CUCURBITS Agri-Science Queensland, DEEDI, Ayr, Queensland, Australia
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EFFICACY OF FUNGICIDE ALTERNATIVES FOR MANAGING … · Bion Standard Agrifos-600 Microthiol Tricop Ecocarb Synertrol-Horti-Oil Cal-Agri-50NF StandSKH Water Timorex Trilogy Peratec
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Department of Employment, Economic Development and Innovation
Elio JovicichChrys Akem Gerry MacManus
Downy mildew Powdery mildew Anthracnose
EFFICACY OF FUNGICIDE ALTERNATIVESFOR MANAGING POWDERY AND DOWNY MILDEWS ON
CUCURBITS
EFFICACY OF FUNGICIDE ALTERNATIVESFOR MANAGING POWDERY AND DOWNY MILDEWS ON
CUCURBITS
Agri-Science Queensland, DEEDI, Ayr, Queensland, Australia
Zucchini and cucumber production issues that affect disease spread and control
Powdery mildewPodosphaera xanthii
• Growers mainly use of systemic and contact fungicides• Crops established with sequential plantings• Proximity between crops; different growth stages• Infected crops sometimes abandoned• Carryover inoculum exposed to multiple sprays of the same active ingredient• Overuse of systemic fungicides favour the survival and proliferation of resistant
pathogen strains• Frequent harvests• Disease control sometimes ineffective
Effectiveness in reducing one or more foliar diseases in selected products alternative to conventional fungicides. Information in product label or reports
Efficacy of spray products on powdery mildew and total fruit yield (12 harvests in a 4-week period) in “Congo” zucchini planted in Bowen in 6 July 2009
Efficacy of spray products on powdery mildew in “Congo” zucchini planted in Ayr in 4 June 2009.Single disease severity rating, top and low canopy leaves, at the end of the crop (12 Aug.)
Efficacy of spray products on downy mildew severity, powdery mildew, and total fruit yield (16 harvests in a 5-week period) in “Congo” zucchiniplanted in Ayr in 4 June 2009.
Efficacy of spray products on downy mildew and total fruit yield (9 harvests in a 4-week period) in “Crystal Salad” cucumber planted in Ayr in 29 June 2009
Efficacy of spray products on anthracnose severity and total fruit yield(12 harvests in a 5-week period) in “Gremlin” cucumber planted in Ayr in 5 August 2009.
Relative effectiveness of spray products for controlling foliar diseases in cucumber and zucchini in North Qld. in 2009Weekly sprays with the same product during the crop season
• Tricop, Microthiol, Bion and AgriFos 600 provided acceptable downy mildew control; however Microthiol and Bion caused phytotoxicity in cucumbers.
• Tricop, Microthiol, Stand SHK, milk, Timorex, Synertrol Horti Oil, Agri-Fos 600, Ecocarb and Aminogro provided acceptable control of powdery mildew.
• Although some of these alternative products used alone in a weekly spray program were not as effective as conventional fungicides for suppressing the target foliar diseases, they provided a degree of control that should make them good components in an integrated disease management program that includes cultivars with disease resistance and a reduced number of systemic fungicide applications.
Alternative spray products for controlling foliar diseases in cucumber and zucchini