Pesticides for Powdery Mildew (Pears)

Stage of Development: 15 mm Green to Tight Cluster
Recommended Product Choices Grp1 Amount per REI2 PHI3 (days) Precautions and Notes
Ha Acre...
Polyoxin D Zinc Salt (Diplomat 5SC) 3291819259 - 926 ml104 - 374 ml0 daysSuppression of powdery mildew. Begin as a preventative application when conditions favour disease development, 7 - 14 day spray interval. Number of applications: 3-10 depending on rate.
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. Do not use with horticultural mineral oil on pears.
Mineral oil (Suffoil-X) 33099NC10 L/1000 L of water10 L/1000 L of water12 hours0Test for crop tolerance before widespread use. Apply at tight cluster and continue every 10-14 days. Avoid application during bloom. Do not use within 14 days before or after captan fungicide. Do not apply more than 8 applications per year.
ipflufenoquin (Kinoprol 20 SC) 3475652165 - 220 ml67 - 89 ml12 h7 daysThe retreatment interval is 7-10 days. Maximum 3 applications per year. Max 2 sequential applications. The 165 ml/ha rate is for suppression of powdery mildew. Addition of a surfactant my improve efficacy.

Stage of Development: 15 mm Green to Tight Cluster

Powdery Mildew (Pears)

4 Product Choices

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...
calcium polysulphide (Lime sulphur 30%) 16465M29L/1000 L9L/1000 L48 h1
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 - 485 gdry to 12 days5Limit sprays of Group 11 fungicides (Flint, Sovran, Pristine) to 2 per season for resistance management. 12 days REI for thinning.
thiophanate-methyl (Senator 50SC) 3209613.15 L1.27 L24 h*1May harm predatory mites. Maximum 2 applications per season.
myclobutanil (Nova 40WP) 223993340 g140 g12 h - 12 days14Limit use of group 3 fungicides (Nova, Inspire) to 2 sprays/season. Rotate with other fungicides for resistance management.
trifloxystrobin (Flint) 3061911140 - 210 g57 - 85 g12 h – 4 days14Limit sprays of Group 11 fungicides (Flint, Sovran, Pristine) to 2 per season for resistance management. Use high rate for high disease pressure. Caution: Sovran drift may injure cherries. 4 days REI for thinning.
kresoxim-methyl (Sovran) 2625711240 - 360 g100 - 150 g48 h30Limit use of class 11 fungicides (Flint, Sovran, Pristine) to 2 per season for resistance management. Use high rate for high disease pressure. Caution: Sovran drift may injure cherries.
difenoconazole + cyprodinil (Inspire Super) 308273 + 9836 mL338 mL12 h14Suppression of powdery mildew. Limit use of Group 3 fungicides (Nova, Inspire) to 2 sprays/season for resistance management.
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) 319817500 mL202 mL12 h30Rotate 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 + 7643 mL260 mL12 h30 daysRotate with other fungicides that do not contain group 3 or group 7 fungicides for resistance management. Do not apply more than 2 consecutive applications.
fluopyram pyrimethanil (Luna Tranquility) 305107 + 9600 mL242 mL12 h72 daysUse preventatively. Do not apply more than 2 times per season.
Polyoxin D Zinc Salt (Diplomat 5SC) 3291819259 - 926 ml104 - 374 ml0 daysSuppression of powdery mildew. Begin as a preventative application when conditions favour disease development, 7 - 14 day spray interval. Number of applications: 3-10 depending on rate.
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. Do not use with horticultural mineral oil on pears.
Mineral oil (Suffoil-X) 33099NC10 L/1000 L of water10 L/1000 L of water12 hours0Test for crop tolerance before widespread use. Apply at tight cluster and continue every 10-14 days. Avoid application during bloom. Do not use within 14 days before or after captan fungicide. Do not apply more than 8 applications per year.
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.
sulphur (Cosavet DF Edge 31869, Kumulus 18836, Microthiol 29487M27.0 kg2.8 kg24 h1
fenazaquin (Magister SC) 3454421 + 391.75 - 2.63 L0.7 - 1.1 L12 h - 17 days10 daysToxic to bees. Avoid application during bloom. Maximum number of applications: 1
ipflufenoquin (Kinoprol 20 SC) 3475652165 - 220 ml67 - 89 ml12 h7 daysThe retreatment interval is 7-10 days. Maximum 3 applications per year. Max 2 sequential applications. The 165 ml/ha rate is for suppression of powdery mildew. Addition of a surfactant my improve efficacy.
Notes: Additional notes: Rotate fungicides from different groups for resistance management.

Stage of Development: Pink

Powdery Mildew (Pears)

20 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.

 

Stage of Development: Petal fall or Calyx
Recommended Product Choices Grp1 Amount per REI2 PHI3 (days) Precautions and Notes
Ha Acre...
Polyoxin D Zinc Salt (Diplomat 5SC) 3291819259 - 926 ml104 - 374 ml0 daysSuppression of powdery mildew. Begin as a preventative application when conditions favour disease development, 7 - 14 day spray interval. Number of applications: 3-10 depending on rate.
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. Do not use with horticultural mineral oil on pears.
Mineral oil (Suffoil-X) 33099NC10 L/1000 L of water10 L/1000 L of water12 hours0Test for crop tolerance before widespread use. Apply at tight cluster and continue every 10-14 days. Avoid application during bloom. Do not use within 14 days before or after captan fungicide. Do not apply more than 8 applications per year.
ipflufenoquin (Kinoprol 20 SC) 3475652165 - 220 ml67 - 89 ml12 h7 daysThe retreatment interval is 7-10 days. Maximum 3 applications per year. Max 2 sequential applications. The 165 ml/ha rate is for suppression of powdery mildew. Addition of a surfactant my improve efficacy.

Stage of Development: Petal fall or Calyx

Powdery Mildew (Pears)

4 Product Choices

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.

 

Funding for this project was provided in part by Agriculture and Agri-Food Canada and the B.C. Ministry of Agriculture through programs delivered by the Investment Agriculture Foundation of B.C.

Agriculture and Agri-Food Canada, the B.C. Ministry of Agriculture and the Investment Agriculture Foundation of BC, are pleased to participate in the delivery of this project. We are committed to working with our industry partners to address issues of importance to the agriculture and agri-food industry in British Columbia. Opinions expressed in this publication are those of the BCFGA and not necessarily those of the Investment Agriculture Foundation, the B.C. Ministry of Agriculture or Agriculture and Agri-Food Canada.

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