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Results of Organic Disease Management Trials Annemiek Schilder Jerri Gillett Roger Sysak Jesse Sadowsky Department of Plant Pathology Michigan State University, East Lansing, MI, USA
Disease control in organic plantings Site selection/isolation Disease-free planting material Resistant or tolerant cultivars Sanitation/pruning Reduce humidity/wetness Healthy soil (?) Mulching
Organic produccts tested Serenade: Bacillus sutilis Actinovate: Streptomyces lydicus PlantShield: Trichoderma harzianum Polyversum: Pythium oligandrum Sporan: rosemary, thyme, clove oil Fungastop: citric acid and mint oil Armicar: potassium icaronate salt GantecGreen: neem extract (azadirachtin) JMS Stylet Oil: paraffin Oxidate: hydrogen dio TetraSul: lime sulf Nordox: cuprous o Basic Copper 53: copper sulfate Organic Gem fish hydrolys SP Compost tea: aeroic, plant-derived compost extract Regalia: giant knotweed extract (Reynoutria sachalinensi
1 cm Mummy erry Monilinia vaccinii-corymosi
Mummy erry shoot strikes a Serenade Indar Ruel, 2000 0 10 20 30 Numer of shoot strikes per ush
Mummy erry shoot strikes Polyversum Actinovate + NF Serenade Max 1.5 l + NF d Serenade Max 3 l + NF d Conventional program d Experimental d 200 NF = NuFilm 17 0 30 60 90 120 Numer of shoot strikes per ush
Mummy erry fruit infection Polyversum a Actinovate + NF cd Serenade Max 1.5 l + NF cd Serenade Max 3 l + NF cd Conventional program Experimental d cd 200 NF = NuFilm 17 0 100 200 300 400 Numer of mummified erries per us
Mummy erry fruit infection Serenade alt. Regalia +NF Serenade Max + NF Regalia GantecGreen 8.5 fl oz GantecGreen 34 fl oz Conventional program Trial A, 20 NF = NuFilm P 0 10 20 30 Numer of mummified erries per us
Mummy erry fruit infection Dormant pruning SP-1 Compost tea Basic Cu Dorm. cd a Tetrasul dormant cde Nordox dorm. efg Fungastop fg Organic Gem fg Oxidate gh Serenade Max gh Sporan Conventional Program j hi Trial B 20 0 10 20 Numer of mummified erries per ush
Phomopsis twig light and canker Phomopsis vaccinii
Phomopsis twig light a JMS Stylet Oil a Armicar c Captan + Benlate d Jersey, 1999 0 5 10 15 20 25 30 Numer of lighted twigs per ush
Phomopsis fruit rot a Polyversum Actinovate + NF Serenade Max 1.5 l + NF Serenade Max 3 l + NF Conventional program Experimental 20 NF = NuFilm 17 sticker/extender 0 5 10 15 20 25 % Infected Berries
Anthracnose fruit rot (Colletotrichum acutatum)
Anthracnose fruit rot Serenade a Captan + Benlate c Jersey, 2001 0 20 40 60 80 % Infected erries
Anthracnose fruit rot a Regalia + NF GantecGreen 8.45 fl oz c Serenade alt. Regalia + NF c GantecGreen 33.8 fl oz cd Conventional d 2009 NF = NuFilm P 0 5 10 15 20 2 % Infected fruit
Anthracnose fruit rot a Nordox Dormant a Dormant pruning a Basic Cu Dorm. a Compost tea a Tetrasul Dormant Fungastop Serenade Max + NF Sporan Organic Gem Conventional Program c Trial B 2009 0 10 20 30 40 50 6 % Fruit rot
Anthracnose fruit rot ac Nordox Dormant Serenade Max + NF a Actinovate a Lime Sulfur Dorm. c Compost tea cd PlantShield cd Sporan Conventional Program d cd Trial B 20 0 10 20 30 40 50 % Fruit rot
Conclusions Mummy erry: Serenade Max, Regalia, Sporan GantecGreen most effective. Phomopsis: Serenade Max, Armicar OK Anthracnose: Sporan, GantecGreen, Organic G OK; Serenade has variale results Dormant sprays (lime sulfur) can help reduce anthracnose, Phomopsis, and mummy erry More trials needed (incl. on-farm) to confirm results
Acknowledgements Funding provided y MSU Project GREEEN, North Central SARE