Pesticides for Apple Scab


Stage of Development: 15 mm Green to Tight Cluster
Recommended Product Choices Grp1 Amount per REI2 PHI3 (days) Precautions and Notes
Ha Acre
metiram (Polyram) 20087M36.0 kg2.4 kg24 h*45Polyram will no longer be registered for use by growers as of June 21, 2021.
mancozeb (Dithane 20553, Manzate 28217) M36.0kg2.4 kg24 h*45
captan (Captan Supra 24613, (Maestro )26408M43.75kg1.5kg48h7Do not apply captan in combination with, immediately before or closely following oil sprays
fluazinam (Allegro) 27517290.50-1.0 L202-404 mL24 h-3 days 28Use highest rates and shortest intervals for high disease pressure. Will also suppress European red mite, apple rust mite and two spotted spider mites. 3 days REI for thinning.
myclobutanil (Nova 40WP) 223993340 g140 g12 h-12 days14Tank mix with the full rate of Dithane, Manzate, Polyram, Captan, or Maestro. Limit sprays of group 3 fungicides (Nova, Inspire, Fullback) to 2/season for resistance management. 12 days REI for thinning.
fluopyram pyrimethanil (Luna Tranquility) 305107 + 9800 mL323 mL12 h14Do not apply more than 2 times per season.
penthiopyrad (Fontelis) 3033171.0-1.5 L405-607 mL12 h28Do not apply more than 3 times per season, or more than twice sequentially. Use high rate for high disease pressure.
boscalid + pyraclostrobin (Pristine WG) 279857 + 111.0 - 1.2 kg405 g - 485 gdry – 12 days5Avoid more than 2 consecutive applications. Limit sprays of Group 11 fungicides (Flint, Sovran, Pristine) to 2 per season. 12 days REI for thinning.
kresoxim-methyl (Sovran) 2625711360 g150 g48 h30Caution: drift may injure cherries. Limit sprays of group 11 fungicides (Flint, Sovran, Pristine) to 2 per season.
flutriafol (Fullback) 316793950 mL385 mL12 h14Tank mix with the full rate of a protectant (e.g. Dithane. Manzate, Polyram, Captan, Maestro). Limit sprays of group 3 fungicides (Nova, Inspire, Fullback) to 2 times/season for resistance management.
difenoconazole + cyprodinil (Inspire Super) 308273 + 9560 - 836 mL227 - 338 mL12 h14Limit sprays of Group 3 fungicides (Nova, Inspire, Fullback) to 2 times/season. Tank mix with a protectant fungicide (Dithane, Manzate, Polyram, captan) for resistance management.
pyrimethanil (Scala) 2801190.75 - 1.0 L304 - 405 mL12 h-24 h14Do not use for apple scab after bloom. 24 hour REI for thinning.
trifloxystrobin (Flint) 3061911140 - 175g57 - 71 g12 h – 4 days14Avoid more than 2 consecutive sprays. Limit sprays of Group 11 fungicides (Flint, Sovran, Pristine) to 2/season. 4 days REI for thinning.
fluxapyroxad (Sercadis) 316977167-333 mL68-135 mL12 h0The use of a non-ionic surfactant (0.125%) is recommended. Begin treatment when conditions favour disease development. Apply a second spray 7-14 days up to blossom if conditions for disease development persist. Maximum amount per season: 1.33 L/ha (538 mL/acre). Maximum 4 applications per season.
benzovindiflupyr (Aprovia) 319817300-500 mL121-202 mL12 h30For improved fruit scab control, tank mix with a protectant fungicide (see label). Rotate with other non-Group 7 products. Do not apply in two consecutive sprays nor more than 2 L/ha (1.0 L/acre) per season.
copper octanoate (Cueva Commercial) 31825M1Prepare 0.5-2% solution (5-20 L/1000 L water)4 h1Apply 470-940 L of mixture/ha (190-380 L/acre). Do not exceed 1% rate for varieties susceptible to russeting. Repeat every 7-10 days as long as weather conditions favour disease development.
benzovindiflupyr + difenoconazole (Aprovia Top) 315263 + 7386 - 643 mL156 - 260 mL30Tank mix with protectant fungicide for improved fruit scab control. Use high rate for mildew. Rotate with other fungicide groups for resistance management. Do not apply more than 2.57 L/ha/season.
Isofetamid (Kenja) 317587913 ml369 ml12 hours20Do not apply more than 2 consecutive Group 7 applications. Application interval: 10 to 14 days.
mefentrifluconazole (Cevya) 3340530.25 - 0.375 L0.1 - 0.15 L12 hours0Do not make more than 2 sequential applications before alternating to a non-group 3 fungicide registered for the same use. Begin applications prior to disease development. Apply an additional applic. at an interval of 7 - 10 days if disease persists or weather conditions are favourable for disease development.
potassium bicarbonate (Sirocco) 31091NC560 g/100 L of water227 g/100 L of water4 hrs0Apply after rainfall or a prolonged period of moisture, when conditions are conducive for the disease development (infection). Apply after infection occurs before reaching 400 degree hours.
pyraclostrobin + fluxapyroxad (Merivon) 339517 + 110.3 - 0.4 L0.12 - 0.16 L12 h - 12 days0 daysLimit sprays of Group 11 fungicides to 2 sprays/season. REI's: hand thinning - 12 days, hand harvesting - 5 days, mechanical harvesting and all other activities - 12 hours.
mancozeb (Penncozeb) 25397M6.0 kg2.4 kg24 hours45 daysMix 2 kg of Penncozeb with 1000 L of water.
Notes: Eradicant sprays are best used in a protective program. However they can be used soon after an infection period and still provide control.
Notes: Foliage is susceptible to apple scab as early as green tip. Apply protective fungicides if wet weather is forecast. See apple scab description for more information.

Stage of Development: 15 mm Green to Tight Cluster

Apple Scab

22 Product Choices

2 Notes

Applications and Notes »  Pest Info »

1Group number for resistance management. NC = not classified.
2Re-entry interval on the label. An asterisk(*) indicates that no re-entry is shown on the label, but the WorkSafe BC re-entry interval may apply and is shown.
3Pre-harvest interval. Note: always read and follow the directions on the pesticide label.

 

Stage of Development: Pink
Recommended Product Choices Grp1 Amount per REI2 PHI3 (days) Precautions and Notes
Ha Acre
pyrimethanil (Scala) 2801190.75-1.0 L304-405 mL12 h-24 h14Do not use after bloom for for apple scab. 24 hour REI for thinning.
metiram (Polyram) 20087M36.0 kg2.4 kg24 h*45Polyram will no longer be registered for use by growers as of June 21, 2021.
mancozeb (Dithane 20553, Manzate 28217) M36.0 kg2.4 kg24 h*45
myclobutanil (Nova 40WP) 223993340 g140 g12 h-12 days14Tank mix with the full rate of Dithane, Manzate, Polyram, Captan or Maestro. Limit sprays of group 3 fungicides (Nova, Inspire) to 2/season for resistance management. 12 days REI for thinning.
fluopyram pyrimethanil (Luna Tranquility) 305107 + 9800 mL323 mL12 h14Do not apply more than 2 times per season.
penthiopyrad (Fontelis) 3033171.0-1.5 L405-607 mL12 h28Do not apply more than 3 times per season, or more than twice sequentially. Use high rate for high disease pressure.
boscalid + pyraclostrobin (Pristine WG) 279857 + 111.0 - 1.2 kg405 g - 485 gdry to 12 days5Avoid more than 2 consecutive applications. Limit sprays of Group 11 fungicides (Flint, Sovran, Pristine) to 2/season. 12 days REI for thinning.
fluazinam (Allegro) 27517290.50 - 1.0 L202 - 404 mL24 h-3 days 28Use highest rates and lowest intervals for high disease pressure. Will also suppress European red mite, two-spotted spider mite, and apple rust mite. 3 days REI for thinning.
flutriafol (Fullback) 316793950 mL385 mL12 h14Tank mix with full rate of a protectant (e.g. Dithane, Manzate, Polyram, Captan, Maestro). Limit sprays of group 3 fungicides (Nova, Inspire, Fullback) to 2 sprays/season for resistance management.
captan (Captan Supra 24613, (Maestro )26408M43.75 kg1.5 kg48 h7Do not use during bloom.
difenoconazole + cyprodinil (Inspire Super) 308273 + 9560 - 836 mL227 - 338 mL12 h14Limit sprays of group 3 fungicides (Nova, Inspire, Fullback) to 2/season. Tank mix with a protectant fungicide (e.g. Dithane, Manzate, Polyram, Captan, maestro) for resistance management.
trifloxystrobin (Flint) 3061911140 - 175 g57 - 71 g12 h – 4 days14Avoid more than 2 consecutive sprays. Limit sprays of Group 11 fungicides (Flint, Sovran, Pristine) to 2/season.
kresoxim-methyl (Sovran) 2625711360 g150 g48 h30CAUTION: Drift may injure cherries. Limit sprays of group 11 fungicides (Flint, Sovran, Pristine) to 2/season.
fluxapyroxad (Sercadis) 316977167-333 mL68-135 mL12 h0The use of a non-ionic surfactant (0.125%) is recommended. Begin treatment when conditions favour disease development. Apply a second spray 7-14 days up to blossom if conditions for disease development persist. Maximum amount per season: 1.33 L/ha (538 mL/acre). Maximum 4 applications per season.
benzovindiflupyr (Aprovia) 319817300-500 mL121-202 mL12 h30For improved fruit scab control, tank mix with a protectant fungicide (see label). Rotate with other non-Group 7 products. Do not apply in two consecutive sprays nor more than 2 L/ha (1.0 L/acre) per season.
benzovindiflupyr + difenoconazole (Aprovia Top) 315263 + 7386 - 643 mL156 - 260 mL12 h30Tank mix with protectant fungicide for improved fruit scab control. Use high rate for mildew. Rotate with other fungicide groups for resistance management. Do not apply more than 2.57 L/ha/season.
copper octanoate (Cueva Commercial) 31825M1Prepare 0.5-2% solution (5-20 L/1000 L water)4 h1Apply 470-940 L of mixture/ha (190-380 L/acre). Do not exceed 1% rate for varieties susceptible to russeting. Repeat every 7-10 days as long as weather conditions favour disease development.
Isofetamid (Kenja) 317587913 ml369 ml12 hours20Do not apply more than 2 consecutive Group 7 applications. Application interval: 10 to 14 days.
mefentrifluconazole (Cevya) 3340530.25 - 0.375 L0.1 - 0.15 L12 hours0Do not make more than 2 sequential applications before alternating to a non-group 3 fungicide registered for the same use. Begin applications prior to disease development. Apply an additional applic. at an interval of 7 - 10 days if disease persists or weather conditions are favourable for disease development.
potassium bicarbonate (Sirocco) 31091NC560 g/100 L of water227 g/100 L of water4 hrs0Apply after rainfall or a prolonged period of moisture, when conditions are conducive for the disease development (infection). Apply after infection occurs before reaching 400 degree hours.
pyraclostrobin + fluxapyroxad (Merivon) 339517 + 110.3 - 0.4 L0.12 - 0.16 L12 h - 12 days0 daysLimit sprays of Group 11 fungicides to 2 sprays/season. REI's: hand thinning - 12 days, hand harvesting - 5 days, mechanical harvesting and all other activities - 12 hours.
mancozeb (Penncozeb) 25397M6.0 kg2.4 kg24 hours45 daysMix 2 kg of Penncozeb with 1000 L of water.
Notes: Pink through petal fall is a high risk period for scab infection. Prevent infection by keeping trees covered with protectant fungicides during this period.
Notes: Eradicant sprays are best used in a preventative program. However they can be used soon after an infection period and still provide control. See apple scab in Disease Section for more information.

Stage of Development: Pink

Apple Scab

22 Product Choices

2 Notes

Applications and Notes »  Pest Info »

1Group number for resistance management. NC = not classified.
2Re-entry interval on the label. An asterisk(*) indicates that no re-entry is shown on the label, but the WorkSafe BC re-entry interval may apply and is shown.
3Pre-harvest interval. Note: always read and follow the directions on the pesticide label.

 

Stage of Development: Petal fall or Calyx
Recommended Product Choices Grp1 Amount per REI2 PHI3 (days) Precautions and Notes
Ha Acre
metiram (Polyram) 20087M36.0 kg2.4 kg24 h*45After second cover spray, reduce rate to 4.50 kg product per hectare if scab pressure is low in the orchard. Polyram will no longer be registered for use by growers as of June 21, 2021.
mancozeb (Dithane 20553, Manzate 28217) M36.0 kg2.4 kg24 h*45
fluopyram pyrimethanil (Luna Tranquility) 305107 + 9800 mL323 mL12 h14Do not apply more than 2 times per season.
penthiopyrad (Fontelis) 3033171.0-1.5 L405-607 mL12 h28Do not apply more than 3 times per season, or more than twice sequentially. Use high rate for high disease pressure.
boscalid + pyraclostrobin (Pristine WG) 279857 + 111.0 - 1.2 kg405 g - 485 gdry to 12 days5Avoid more than 2 consecutive applications. Limit sprays of group 11 fungicides (Flint, Sovran, Pristine) to 2 per season. 12 days REI for thinning.
difenoconazole + cyprodinil (Inspire Super) 308273 + 9560 - 836 mL227 - 338 mL12 h14Limit sprays of group 3 fungicides (Nova, Inspire, Fullback) to 2 per season. Tank mix with a protectant fungicide (Dithane, Manzate, Polyram, Captan, Maestro)) for resistance management.
fluazinam (Allegro) 27517290.50 - 1.0 L202 - 404 mL25 h-3 days28Use highest rate and shortest interval for high disease pressure. Will also suppress mites. 3 days REI for thinning.
captan (Captan Supra 24613, (Maestro )26408M43.75 kg1.5 kg48 h7Do not use during bloom.
myclobutanil (Nova 40WP) 223993340 g140 g12 h - 12 days14Do not use as an eradicant treatment after bloom. Tank mix with the full rate of a protectant such as Dithane, Manzate, Polyram, Captan or Maestro. Note that Dithane, Manzate and Polyram have a 45-day PHI. Limit sprays of group 3 fungicides (Nova, Inspire, Fullback) to 2/season for resistance management. 12 days REI for thinning.
flutriafol (Fullback) 316793950 mL385 mL12 h14Tank mix with a full rate of a protectant such as Dithane, Manzate, Polyram, Captan or Maestro. Note that Dithane, Manzate and Polyram have a 45-day PHI. Limit sprays of group 3 fungicides (Nova, Inspire, Fullback) to 2/season for resistance management.
trifloxystrobin (Flint) 3061911140 - 175 g57 - 71 g12 h – 4 days14Limit sprays of group 11 fungicides (Flint, Sovran, Pristine) to 2/season. 4 days REI for thinning.
kresoxim-methyl (Sovran) 2625711360 g150 g48 h30CAUTION: Sovran drift may injure cherries. Limit sprays of group 11 fungicides (Flint, Sovran, Pristine) to 2/season.
benzovindiflupyr (Aprovia) 319817300-500 mL121-202 mL12 h30For improved fruit scab control, tank mix with a protectant fungicide (see label). Rotate with other non-Group 7 products. Do not apply in two consecutive sprays nor more than 2 L/ha (1.0 L/acre) per season.
benzovindiflupyr + difenoconazole (Aprovia Top) 315263 + 7386 - 643 mL156 - 260 mL12 h30Tank mix with protectant fungicide for improved fruit scab control. Use high rate for mildew. Rotate with other fungicide groups for resistance management. Do not apply more than 2.57 L/ha/season.
copper octanoate (Cueva Commercial) 31825M1Prepare 0.5-2% solution (5-20 L/1000 L water)4 h1Apply 470-940 L of mixture/ha (190-380 L/acre). Do not exceed 1% rate for varieties susceptible to russeting. Repeat every 7-10 days as long as weather conditions favour disease development.
Isofetamid (Kenja) 317587913 ml369 ml12 hours20Do not apply more than 2 consecutive Group 7 applications. Application interval: 10 to 14 days.
mefentrifluconazole (Cevya) 3340530.25 - 0.375 L0.1 - 0.15 L12 hours0Do not make more than 2 sequential applications before alternating to a non-group 3 fungicide registered for the same use. Begin applications prior to disease development. Apply an additional applic. at an interval of 7 - 10 days if disease persists or weather conditions are favourable for disease development.
potassium bicarbonate (Sirocco) 31091NC560 g/100 L of water227 g/100 L of water4 hrs0Apply after rainfall or a prolonged period of moisture, when conditions are conducive for the disease development (infection). Apply after infection occurs before reaching 400 degree hours.
pyraclostrobin + fluxapyroxad (Merivon) 339517 + 110.3 - 0.4 L0.12 - 0.16 L12 h - 12 days0 daysLimit sprays of Group 11 fungicides to 2 sprays/season. REI's: hand thinning - 12 days, hand harvesting - 5 days, mechanical harvesting and all other activities - 12 hours.
mancozeb (Penncozeb) 25397M6.0 kg2.4 kg24 hours45 daysMix 2 kg of Penncozeb with 1000 L of water.
Notes: Pink through petal fall is a high risk period for apple scab infection. Prevent infection by keeping trees covered with protectant fungicides during this period.
Notes: Eradicant sprays are best used in a protective program. However they can be used soon after an infection period and still provide control.

Stage of Development: Petal fall or Calyx

Apple Scab

20 Product Choices

2 Notes

Applications and Notes »  Pest Info »

1Group number for resistance management. NC = not classified.
2Re-entry interval on the label. An asterisk(*) indicates that no re-entry is shown on the label, but the WorkSafe BC re-entry interval may apply and is shown.
3Pre-harvest interval. Note: always read and follow the directions on the pesticide label.

 

Stage of Development: Summer
Recommended Product Choices Grp1 Amount per REI2 PHI3 (days) Precautions and Notes
Ha Acre
Notes: If no scab is present on apple leaves or fruit by the end of June, scab sprays are not needed for the remainder of the season. If scab symptoms are present, continue protectant fungicide coverage until harvest, with particular consideration to rainy weather. See Petal fall section for available fungicides. Check pre-harvest intervals before any late-season sprays.

Stage of Development: Summer

Apple Scab

0 Product Choices

1 Notes

Applications and Notes »  Pest Info »

1Group number for resistance management. NC = not classified.
2Re-entry interval on the label. An asterisk(*) indicates that no re-entry is shown on the label, but the WorkSafe BC re-entry interval may apply and is shown.
3Pre-harvest interval. Note: always read and follow the directions on the pesticide label.