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How to Manage Pests
UC Pest Management Guidelines
Pear
2008 Fungicide Efficacy and
Treatment Timing
(Reviewed 2/08,
updated 2/08)
In this Guideline:
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FUNGICIDE EFFICACY FOR PEARS DISEASES
| Fungicide |
Resistance risk (FRAC#)1 |
Scab |
| Protectant |
Eradicant |
| Bayleton |
high (3) |
— |
— |
| Benlate2 |
high (1) |
+++ |
+++ |
| Distinguish* |
medium (9/11) |
+++ |
+++ |
| Flint3 |
high (11)4 |
++++ |
++++ |
| Pristine |
medium (11/7) |
++++ |
— |
| Procure5 |
high (3) |
++++ |
++++ |
| Rally6 |
high (3) |
++++ |
++ |
| Rubigan5 |
high (3) |
++++ |
++++ |
| Scala |
high (9)4 |
+++ |
+++ |
| Sovran |
high (11)4 |
+++ |
+++ |
| Syllit |
medium (M7) |
+++ |
+++ |
| Topsin-M/ T-Methyl4 |
high (1)4 |
+++ |
+++ |
| Vangard |
high (9)4
|
+++ |
+++ |
| Captan7 |
low (M4) |
+++ |
— |
| Dithane7 |
low (M3) |
+++ |
— |
| Maneb6,7 |
low (M3) |
+++ |
— |
| Thiram6 |
low (M3) |
++ |
— |
| Ziram7 |
low (M3) |
++ |
— |
| Copper7 |
low (M1) |
++8 |
— |
| Lime sulfur7,9 |
low (M2) |
— |
++++9 |
| Sulfur7 |
low (M2) |
++ |
— |
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Fire blight13 |
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| Bactericide/ Biological |
Resistance risk |
Contact |
Systemic |
Phytotoxicity |
| Ag Streptomycin |
high |
++++ |
+++ |
+/- |
| Agri-Mycin |
high |
++++ |
+++ |
+/- |
| MycoShield11 |
high |
+++ |
+++ |
+/- |
| Copper8 |
low |
+++ |
— |
+ |
| Captan7 |
low (M4) |
+++ |
— |
— |
| Dithane7 |
low (M3) |
+++ |
— |
— |
| Blight Ban |
low |
++ |
— |
+/- |
| Bloomtime Bio12 |
low |
+++ (pending registration) |
— |
+/- (pending registration) |
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FUNGICIDE TREATMENT TIMING IN PEARS
Note: Not all indicated timings may be necessary for disease control.
| Disease |
Fall |
Delayed dormant |
Green tip |
Pink bud |
Spring |
| Scab1 |
++2 |
++2 |
+++ |
+++ |
+++ |
| Fire blight |
— |
— |
— |
+++ |
+++4 |
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Adapted from:
Adaskaveg, J. E., B. A. Holtz, T. J. Michailides, and W. D. Gubler. 2008. Efficacy
and Timing of Fungicides, Bactericides, and Biologicals for Deciduous Tree Fruit, Nut, Strawberry, and Vine Crops
UC IPM Pest Management Guidelines: Pear
UC ANR Publication 3455
General Information
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