Organic Apple Production Disease Management

1
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
2
2006 Organic Fungicide ProgramUniversity Drive
Orchard PSU FREC Biglerville, PARome 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
3
2006 Incidence of Apple Scab on Shoots of 3 Apple
Cultivars Dilute Sprays (20 June 2006)
d
cd
c
b
ab
ab
ab
ab
a
Three apple cvs., Rome, R. Del., and G. Del.
Means marked with the same letter(s) are not
significantly different, Fishers Protected LSD,
P lt 0.05.
4
2006 Severity of Apple Scab on Fruit of 3 Apple
Cultivars Dilute Sprays (20 June 2006)
c
c
b
a
a
a
a
a
a
Three apple cvs., Rome, R. Del., and G. Del.
Means marked with the same letter(s) are not
significantly different, Fishers Protected LSD,
P lt 0.05.
5
2006 Incidence of Powdery Mildew on Shoots of 3
Apple Cultivars Dilute Sprays (20 June 2006)
d
cd
bc
ab
ab
ab
a
a
a
Three apple cvs., Rome, R. Del., and G. Del.
Means marked with the same letter(s) are not
significantly different, Fishers Protected LSD,
P lt 0.05.
6
2006 Incidence of Cedar Apple Rust on Shoots of
3 Apple Cultivars Dilute Sprays (20 June 2006)
b
a
a
a
a
a
a
a
a
Three apple cvs., Rome, R. Del., and G. Del.
Means marked with the same letter(s) are not
significantly different, Fishers Protected LSD,
P lt 0.05.
7
2006 Incidence of Cedar Apple Rust on Fruit of 3
Apple Cultivars Dilute Sprays (20 June 2006)
c
bc
abc
ab
ab
a
a
a
a
Three apple cvs., Rome, R. Del., and G. Del.
Means marked with the same letter(s) are not
significantly different, Fishers Protected LSD,
P lt 0.05.
8
2005 Organic Alternative Trials Scab
Incidence on G .Delicious
Incidence on Fruits
Incidence on Shoot Leaves
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 VCPN.Org. 6. Standard Fung. Ck 7.
Vigor-Ca-Cu PhosN.Org. 8. Water Ck
9
2005 Fly Speck Sooty Blotch on G.
DeliciousDilute 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 VCPN.Org. 6.
Standard Fung. Ck 7. Vigor-Ca-Cu PhosN.Org. 8.
Water Ck
10
2005 Fruit Rot Incidence Harvest Golden
Delicious
rot incidence
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 VCPN.Org. 6.
Standard Fung. Ck 7. Vigor-Ca-Cu PhosN.Org. 8.
Water Ck

1 2 3 4 5 6
7 8 Treatments
11
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 VCPN.Org. 6.
Standard Fung. Ck 7. Vigor-Ca-Cu PhosN.Org. 8.
Water Ck

1 2 3 4 5 6
7 8 Treatments
Travis, J.W., et. al. 2005 Alternative
Fungicide Trials. Postharvest Rot Incid. on
Fruits.
12
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)

c
bc
a
ab
a
a
1 2 3 4 5 6
Travis, J.W., et. al. 2004 Alternative
Fungicide Trials. fruit incidence 8 Sept. P
lt 0.5 DMRT.