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.
Apple Disease Control Toolbox - Fungicide and Antibiotic Efficacy - Articles

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Apple Diseases and Recommended Fungicides

Recommendations are based on chemical registrations as of December 2017.

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. 206 in the 2018-2019 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 blotchApple scabBitter rotBlack rotBlossom end rot (Botrytis)Fire blightFlyspeckPowdery mildewRustsSooty blotchWhite rot
Aprovia31333623323
Blossom Protecta66666366666
captanb62213635521
copperb,c,d63666366666
ferbamb33424635232
Flintb,c,e61226621316
Fontelisc61666663166
Indarc61666611116
Inspire Superb,c11666612116
kasugamycin66666366666
Luna Sensationb,c61116611211
Luna Tranquilityb61666661666
mancozeb22222645242
Merivonb,c11111611211
Omega32226626323
oxytetracycline66666466666
polyoxin D zinc salt33336623623
Pristineb,c11111611211
Procure/Trionicb,c62666661166
Rallyb,c62666661166
Regalia63336333333
Rhyme/Topguardc62666661266
Rubiganb,c63666662266
Scalac61666666666
Sercadisc21636631333
Serenade Opti63336433433
Sovranb,c11226621312
streptomycinc66666166666
Sulforix/lime sulfur63666662666
sulfurb44344643444
Syllitc61666663266
thiophanate-methylb64632612613
Vangardc61666666666
Ziramb33426636222

Degree of control: 1 = best, 2 = good, 3 = fair, 4 = slight, 5 = none, 6 = no registration. 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, Inspire Super, Luna Sensation, Merivon, Pristine, Procure/Trionic, Rally, Rubigan, 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.
d. Not all coppers are labeled the same; refer to the specimen label of the copper being used for diseases covered.
e. In 2018, Flint Extra will replace Flint.

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