CHERRY:  FUNGICIDE EFFICACY - CONVENTIONAL

Rating: 5 = excellent and consistent, 4 = good and reliable, 3 = moderate and variable, 2 = limited and/or erratic, 1 = minimal and often ineffective, 0 = ineffective, NL = not on label, and ND = no data.

* Registration pending in California.

** Not registered, label withdrawn or inactive in California.

*** Postharvest fruit registrations in California include: BioSpectra/Cerafruta/Uniguard, Chairman, Mentor, Penbotec/Pyrimethanil, and Scholar/FDL.

¹ Code numbers are assigned by the Fungicide Resistance Action Committee (FRAC) according to different modes of actions (for more information, see http://www.frac.info/). Fungicides with a different Code number are suitable to alternate in a resistance management program. In California, make no more than one application of fungicides with mode-of-actions (MOA) with high resistance risk before rotating to a fungicide with a different MOA (Code number); for other fungicides, make no more than two consecutive applications before rotating to fungicide with a different MOA (Code number).

² Do not use the same fungicide or fungicides with similar chemistry more than twice in one year.

³ Shot hole and leaf spot occur infrequently on cherry in California; control usually is not necessary.

⁴ Strains of Monilinia fructicola resistant to Topsin-M and T-Methyl are present in some California cherry orchards. Resistant strains of the jacket rot fungus, Botrytis cinerea, and powdery mildew fungi have been reported in California on crops other than almond and stone fruits and may have the potential to develop in sweet cherry with overuse of fungicides with similar chemistry.

⁵ To reduce the risk of resistance development, start treatments with a fungicide with a multi-site mode of action; rotate or mix fungicides with different mode of action FRAC numbers for subsequent applications, use labeled rates (preferably the upper range), and limit the total number of applications per season.

⁶ Blossom blight only; not registered for use after petal fall

⁷ Oil to use is a "light" summer oil, 1-2% volume/volume.

⁸ More effective when applied as a concentrate (80-100 gal/acre) than as a dilute spray.

⁹ Do not use after jacket (shuck) split.

¹⁰ Do not use in combination with or shortly before or after oil treatment.

CHERRY: FUNGICIDE EFFICACY - BIOCONTROLS AND NATURAL PRODUCTS

** Not registered, label withdrawn or inactive in California.

Rating: 5 = excellent and consistent, 4 = good and reliable, 3 = moderate and variable, 2 = limited and/or erratic, 1 = minimal and often ineffective, 0 = ineffective, NL = not on label, and ND = no data.

¹ Organic treatments arranged by performance on brown rot.

² FRAC Codes are also provided as BM- or P-number codes. In general, sulfur compounds are fungicidal and may affect applications of fungal biocontrols (e.g., Botector); whereas copper may affect applications of bacterial biocontrols (e.g., Actinovate, Double Nickel 55, and Serenade). Rotations must consider these factors.

³ In general, sulfur compounds are fungicidal and may affect applications of fungal biocontrols (e.g., Blossom Protect); whereas copper may affect applications of bacterial biocontrols (e.g., Actinovate, Double Nickel 55, and Serenade). Rotations must consider these factors.

CHERRY: TREATMENT TIMING

Note: Not all indicated timings may be necessary for disease control.

Rating: 3 = most effective, 2 = moderately effective, 1 = least effective, and 0 = ineffective

¹ Select broad-spectrum fungicides (or combinations) that have activity against both brown rot and Botrytis fruit rots.

² Begin at popcorn and repeat every 10 to 14 days through bloom if rains continue.

³ Use sulfur at late bud break and other fungicides for later treatment. Treat immediately if mildew is found on shoots or leaves on inner scaffolds.

CHERRY: SUGGESTED DISEASE MANAGEMENT PROGRAMS BY FUNGICIDE FRAC¹ CODES - CONVENTIONAL AND ORGANIC GROWERS

Note: Not all indicated timings may be necessary for disease control (see Treatment Timing Table). If treatments are needed based on weather monitoring or environmental monitoring models, suggested fungicide Codes are listed for each timing.

How to use this table:

1) Identify the disease(s) that need(s) to be managed. Know the disease history of the orchard especially from the previous season.

2) Select one of the suggested fungicide Codes. Numbers separated by slashes are pre-mixtures, whereas numbers grouped by pluses are tank mixtures. If several diseases need to be managed, select a Code that is effective against all diseases. Refer to fungicide efficacy table for fungicides belonging to each FRAC Code. Code numbers are listed in numerical order within the suggested disease management program.

3) Rotate Codes for each application within a season and, if possible, use each Code only once per season, except for multi-site mode of action materials or natural products/biological controls (i.e., FRAC Codes M2, BM 01, BM 02, NC).

¹ Code numbers are assigned by the Fungicide Resistance Action Committee (FRAC) according to different modes of actions (for more information, see http://www.frac.info/). Code numbers are listed in numerical order within the suggested disease management program. Fungicides with a different Code number are suitable to alternate in a resistance management program. Refer to the fungicide efficacy table for fungicides belonging to each FRAC Code. FRAC Codes for soft chemistries: potassium bicarbonate (e.g., Kaligreen, Milstop FC NC), fermentation product (FC 19 – e.g., Oso), Streptomyces lydicus (e.g., Actinovate AG – FC BM 02), Bacillus amyloliquefaciens Strain MBI 600 (e.g., Serifel – FC BM 02), and Bacillus amyloliquefaciens Strain QST 713 (e.g., Serenade – FC BM 02). In general, sulfur compounds (FC M2) are fungicidal and may affect applications of fungal biocontrols (e.g., Blossom Protect); whereas copper may affect applications of bacterial biocontrols (e.g., Actinovate, Double Nickel 55, and Serenade). Rotations of products must consider these factors.

² Use liquid lime sulfur in dormant applications and wettable sulfur at and after prebloom.

³ Strains of Monilinia fructicola resistant to Topsin-M, and T-Methyl are present in some California cherry orchards. Resistant strains of the jacket rot fungus, Botrytis cinerea, and powdery mildew fungi have been reported in California on crops other than almond and stone fruits and may have the potential to develop in sweet cherry with overuse of fungicides with similar chemistry.

⁴ Among the Code 3 fungicides, Elite//Orius and Quash have some activity against Botrytis cinerea.