Diseases

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Organic Apple Production Disease Management James W. Travis - Professor of Plant Pathology Noemi O. Halbrendt – Research Associate Brian L. Lehman – Research Assistant FREC Tech Service / Terry Salada - Farm Manager Victor Fluke, Summer Chronister, Andrea Luquette, Alison Group, Dillon Guise, Emily Lobaugh – Summer Research Assistants Jean Morris, Karen Weaver , Kathy Wholaver – Staff Assistants Milton Loyer - Statistician Fruit Research & Extension Center, PSU, Biglerville, PA PSU Main Campus Cooperators Paul Backman – Prof. of Plant Pathology Tim McNellis – Assoc. Prof., Plant Pathology Maria Jimenez Gasco - Asst. Prof., Plant Pathology Jo Rytter – Research Support Assistant Anissa Demers - Graduate Student Steve Andrew Lee - Graduate Student

2006 Organic Fungicide ProgramUniversity Drive Orchard PSU FREC Biglerville, PA’Rome Beauty’ - ’G. Delicious’ –’R. Del.’ : 

2006 Organic Fungicide Program University Drive Orchard PSU FREC Biglerville, PA ’Rome Beauty’ - ’G. Delicious’ –’R. Del.’ Treatment & Rate/A Timing 1. Nontreated CK 2. Cham. Cu WP 1 lb 1/4G Citrex 8 oz P-H 3. Cham. Cu WP 1 lb 1/4G Citrex 8 oz + Micro Sulf 15 lb P-H 4. Cham. Cu WP 1 lb 1/4GT Micro Sulf 15 lb P-H 5. Cham. Cu WP 1 lb 1/4 GT Micro Sulf 15 lb P-B Lime Sulfur 2% + JMS Oil 2% PF MicroSulf 15 lb 1C-H Treatment & Rate/A Timing 6. Cham. Cu WP 1 lb 1/4 GT EF-400 OM 32 oz P-H 7. Cham. Cu WP 1 lb 1/4 GT EF-400 OM 32 oz Rot. w/ Micro Sulf 15 lb P-H 8. Cham. Cu WP 1 lb 1/4 GT Lime Sulfur 1.5% + P-B Lime Sulfur 2.0 % + JMS Oil 2% PF Lime Sulfur 1.0% 14 da 1C-H 9. Cham. Cu WP 1 lb 1/4GT Micro Sulf 15 lb + Vigor Cal 1 gal P-H

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cd** c b ab ab d ab a ab * Three apple cvs., Rome, R. Del., and G. Del. ** Means marked with the same letter(s) are not significantly different, Fisher’s Protected LSD, P < 0.05. 2006 Incidence of Apple Scab on Shoots of 3 Apple Cultivars* Dilute Sprays – (20 June 2006)

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c** b a a a c * Three apple cvs., Rome, R. Del., and G. Del. ** Means marked with the same letter(s) are not significantly different, Fisher’s Protected LSD, P < 0.05. a a a 2006 Severity of Apple Scab on Fruit of 3 Apple Cultivars* Dilute Sprays – (20 June 2006)

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* Three apple cvs., Rome, R. Del., and G. Del. ** Means marked with the same letter(s) are not significantly different, Fisher’s Protected LSD, P < 0.05. d** bc a a ab cd a ab ab 2006 Incidence of Powdery Mildew on Shoots of 3 Apple Cultivars* Dilute Sprays – (20 June 2006)

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* Three apple cvs., Rome, R. Del., and G. Del. ** Means marked with the same letter(s) are not significantly different, Fisher’s Protected LSD, P < 0.05. b** a a a a a a a a 2006 Incidence of Cedar Apple Rust on Shoots of 3 Apple Cultivars* Dilute Sprays – (20 June 2006)

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* Three apple cvs., Rome, R. Del., and G. Del. ** Means marked with the same letter(s) are not significantly different, Fisher’s Protected LSD, P < 0.05. c** ab a ab abc a bc a a 2006 Incidence of Cedar Apple Rust on Fruit of 3 Apple Cultivars* Dilute Sprays – (20 June 2006)

2005 Organic & Alternative Trials: Scab Incidence on G .Delicious: 

2005 Organic & Alternative Trials: Scab Incidence on G .Delicious 1. Micro Sulf 15 lb 2. Lime Sulfur 2%, LS 1% 3. Armicarb 5lb+ JMS Oil 2% 4. Serenade 4lb + Nufilm 0.5% 5. LS 2%, 1% + VCP*N.Org. 6. Standard Fung. Ck 7. Vigor-Ca-Cu Phos*N.Org. 8. Water Ck % Incidence on Shoot Leaves % Incidence on Fruits

2005 Fly Speck & Sooty Blotch on ‘G. Delicious’Dilute Sprays : 

2005 Fly Speck & Sooty Blotch on ‘G. Delicious’ Dilute Sprays Treatments 1. Micro Sulf 15 lb 2. Lime Sulfur 2%, LS 1% 3. Armicarb 5lb+ JMS Oil 2% 4. Serenade 4lb + Nufilm 0.5% 5. LS 2%, 1% + VCP*N.Org. 6. Standard Fung. Ck 7. Vigor-Ca-Cu Phos*N.Org. 8. Water Ck

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2005 Fruit Rot Incidence – Harvest ‘Golden Delicious’ Treatments 1. Micro Sulf 15 lb 2. Lime Sulfur 2%, LS 1% 3. Armicarb 5lb+ JMS Oil 2% 4. Serenade 4lb + Nufilm 0.5% 5. LS 2%, 1% + VCP*N.Org. 6. Standard Fung. Ck 7. Vigor-Ca-Cu Phos*N.Org. 8. Water Ck 1 2 3 4 5 6 7 8 Treatments % rot incidence

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2005 Fruit Rot Incidence on ‘G. Delicious’** Treatments 1. Micro Sulf 15 lb 2. Lime Sulfur 2%, LS 1% 3. Armicarb 5lb+ JMS Oil 2% 4. Serenade 4lb + Nufilm 0.5% 5. LS 2%, 1% + VCP*N.Org. 6. Standard Fung. Ck 7. Vigor-Ca-Cu Phos*N.Org. 8. Water Ck ** Travis, J.W., et. al. 2005 Alternative Fungicide Trials. Postharvest % Rot Incid. on Fruits. 1 2 3 4 5 6 7 8 Treatments

2004 Fruit Rot Incidence on ‘G. Delicious’ at Harvest* : 

2004 Fruit Rot Incidence on ‘G. Delicious’ at Harvest* Treatments Lime Sulfur (2.5%) Champ Copper WP Lime Sulfur (1%) Std. Fungicide CK Water CK Vigor Cal +Lime Sulfur (1%) 1 2 3 4 5 6 *Travis, J.W., et. al. 2004 Alternative Fungicide Trials. % fruit incidence 8 Sept.; P < 0.5 DMRT. a a ab a bc c