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Apple Disease Control Toolbox - Fungicide and Antibiotic Efficacy

Fungicides should be selected based on apple diseases to be controlled and product efficacy for each. Growers can prevent resistance to fungicides by alternating chemicals by FRAC code group.

Updated:

March 10, 2020

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Apple Disease Control Toolbox - Fungicide and Antibiotic Efficacy

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Apple Diseases and Recommended Fungicides

Recommendations are based on chemical registrations as of September 2019.

To avoid fungicide resistance, practice good cultural control methods, use fungicide mixtures, tank-mix with a broad-spectrum protectant, and alternate chemicals by FRAC code group (p. 215 in the 2020-2021 Penn State Tree Fruit Production Guide)

Please refer to product labels and the Penn State Extension Tree Fruit Production Guide for details on chemical use.

	Alternaria leaf blotch	Apple scab	Bitter rot	Black rot	Calyx-end rot	Fire blight	Flyspeck	Powdery mildew	Rusts	Sooty blotch	White rot
Aprovia^c	3	1	3	3	3	6	2	3	3	2	3
Blossom Protect^a	6	6	6	6	6	3	6	6	6	6	6
captan^b	6	2	2	1	3	6	3	5	5	2	1
copper^b,d	6	2	6	6	6	3	6	6	6	6	6
Double Nickel	6	3	3	3	6	3	3	3	4	3	3
ferbam^b	3	3	3	2	4	6	3	5	2	3	2
Flint Extra^b,c	6	1	5	2	6	6	2	1	3	1	6
Fontelis^c	6	1	6	6	6	6	6	3	1	6	6
Indar^b,c	6	1	6	6	6	6	1	3	1	1	6
Inspire Super^b,c	1	1	6	6	6	6	1	2	1	1	6
kasugamycin	6	6	6	6	6	3	6	6	6	6	6
Kenja^b,c	6	1	6	6	6	6	6	3	6	6	6
LifeGard	6	6	6	6	6	3	6	6	6	6	6
Luna Sensation^b,c	6	1	5	1	6	6	1	1	2	1	1
Luna Tranquility^c	6	1	6	6	6	6	6	1	6	6	6
Magister	6	6	6	6	6	6	6	1	6	6	6
mancozeb	2	2	2	2	2	6	4	5	2	4	2
Merivon^b,c	1	1	1	1	1	6	1	1	2	1	1
Omega	3	2	3	2	6	6	2	6	3	2	3
oxytetracycline	6	6	6	6	6	4	6	6	6	6	6
polyoxin D zinc salt	3	3	3	3	6	6	2	3	6	2	3
potassium bicarbonate	3	2	5	5	6	6	5	3	6	4	5
Pristine^b,c	1	1	1	1	1	6	1	1	2	1	1
Procure/Trionic^b,c	6	2	6	6	6	6	6	1	1	6	6
Rally^b,c	6	2	6	6	6	6	6	1	1	6	6
Regalia	6	3	3	3	6	3	3	3	3	3	3
Rhyme/Topguard^c	6	2	6	6	6	6	6	1	2	6	6
Rubigan^b,c	6	3	6	6	6	6	6	2	2	6	6
Scala^c	6	1	6	6	6	6	6	6	6	6	6
Sercadis^b,c	2	1	6	3	6	6	3	1	3	3	3
Serenade Opti	6	6	3	3	3	6	3	3	3	4	3
Sovran^b,c	1	1	2	2	6	6	2	1	3	1	2
streptomycin^c	6	6	6	6	6	1	6	6	6	6	6
Sulfur, lime	6	3	6	6	6	3	6	2	6	6	6
sulfur^b	3	3	3	3	3	6	3	2	4	3	3
Syllit^c	6	1	6	6	6	6	6	3	2	6	6
thiophanate-methyl^b,c	6	4	6	3	2	6	1	2	6	1	3
Torino	6	6	6	6	6	6	6	1	6	6	6
Vangard^c	6	1	6	6	6	6	6	6	6	6	6
Ziram^b	3	3	2	2	6	6	3	6	2	2	2

Degree of control: 1 = best, 2 = good, 3 = fair, 4 = slight, 5 = none, 6 = no registration: not labeled. Uppercase names are trade names; lowercase names are common names for products with more than one trade name.

a. Blossom Protect can cause significant russeting when conditions favor apple scab during bloom and petal fall.
b. Fruit finish on yellow varieties when used as recommended: very good for captan, Flint Extra, Indar, Inspire Super, Kenja, Luna Sensation, Merivon, Pristine, Procure/Trionic, Rally, Rubigan, Sercadis, and Sovran; good for thiophanate-methyl and Ziram; poor for copper, ferbam, and sulfur.
c. Rankings assume no resistance in the pathogen population in an orchard; however it is recommended to tank-mix with a broad-spectrum fungicide for maximum efficacy.
d. Not all coppers are labeled the same; refer to the specimen label of the copper being used for diseases covered.

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