Pesticides for Powdery Mildew (Pears)
| Stage of Development: Pink | ||||||
|---|---|---|---|---|---|---|
| Recommended Product Choices | Grp1 | Amount per | REI2 | PHI3 (days) | Precautions and Notes | |
| Ha | Acre... | |||||
| calcium polysulphide (Lime sulphur 30%) 16465 | M2 | 9L/1000 L | 9L/1000 L | 48 h | 1 | |
| penthiopyrad (Fontelis) 30331 | 7 | 1.0-1.5 L | 405-607 mL | 12 h | 28 | Do not apply more than 3 times per season, or more than twice sequentially. Use high rate for high disease pressure. |
| boscalid + pyraclostrobin (Pristine WG) 27985 | 7 + 11 | 1.0 - 1.2 kg | 405 - 485 g | dry to 12 days | 5 | Limit sprays of Group 11 fungicides (Flint, Sovran, Pristine) to 2 per season for resistance management. 12 days REI for thinning. |
| thiophanate-methyl (Senator 50SC) 32096 | 1 | 3.15 L | 1.27 L | 24 h* | 1 | May harm predatory mites. Maximum 2 applications per season. |
| myclobutanil (Nova 40WP) 22399 | 3 | 340 g | 140 g | 12 h - 12 days | 14 | Limit use of group 3 fungicides (Nova, Inspire) to 2 sprays/season. Rotate with other fungicides for resistance management. |
| trifloxystrobin (Flint) 30619 | 11 | 140 - 210 g | 57 - 85 g | 12 h – 4 days | 14 | Limit 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) 26257 | 11 | 240 - 360 g | 100 - 150 g | 48 h | 30 | Limit 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) 30827 | 3 + 9 | 836 mL | 338 mL | 12 h | 14 | Suppression of powdery mildew. Limit use of Group 3 fungicides (Nova, Inspire) to 2 sprays/season for resistance management. |
| fluxapyroxad (Sercadis) 31697 | 7 | 167-333 mL | 68-135 mL | 12 h | 0 | The 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) 31981 | 7 | 500 mL | 202 mL | 12 h | 30 | 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) 31526 | 3 + 7 | 643 mL | 260 mL | 12 h | 30 days | Rotate 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) 30510 | 7 + 9 | 600 mL | 242 mL | 12 h | 72 days | Use preventatively. Do not apply more than 2 times per season. |
| Polyoxin D Zinc Salt (Diplomat 5SC) 32918 | 19 | 259 - 926 ml | 104 - 374 ml | 0 days | Suppression 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) 33405 | 3 | 0.25 - 0.375 L | 0.1 - 0.15 L | 12 hours | 0 | Do 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) 33099 | NC | 10 L/1000 L of water | 10 L/1000 L of water | 12 hours | 0 | Test 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) 33951 | 7 + 11 | 0.3 - 0.4 L | 0.12 - 0.16 L | 12 h - 12 days | 5 days (hand harvest) | Limit 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 29487 | M2 | 7.0 kg | 2.8 kg | 24 h | 1 | |
| fenazaquin (Magister SC) 34544 | 21 + 39 | 1.75 - 2.63 L | 0.7 - 1.1 L | 12 h - 17 days | 10 days | Toxic to bees. Avoid application during bloom. Maximum number of applications: 1 |
| garlic powder (Buran) 30601 | NC | 9 L/500 to 800 L of water | 9 L/500 to 800 L of water | 0 | Disease control can be achieved under low to moderate disease pressure. Begin applications when conditions are conducive to disease development. The addition of a registered non-ionic surfactant such as Agral 90 or AgSurf at a rate of 0.1% could help to improve the spreading. | |
| Notes: Additional notes: Rotate fungicides from different groups for resistance management. | ||||||
Stage of Development: Pink
Powdery Mildew (Pears)
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: 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) 32918 | 19 | 259 - 926 ml | 104 - 374 ml | 0 days | Suppression 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) 33405 | 3 | 0.25 - 0.375 L | 0.1 - 0.15 L | 12 hours | 0 | Do 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) 33099 | NC | 10 L/1000 L of water | 10 L/1000 L of water | 12 hours | 0 | Test 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. |
| garlic powder (Buran) 30601 | NC | 9 L/500 to 800 L of water | 9 L/500 to 800 L of water | 0 | Disease control can be achieved under low to moderate disease pressure. Begin applications when conditions are conducive to disease development. The addition of a registered non-ionic surfactant such as Agral 90 or AgSurf at a rate of 0.1% could help to improve the spreading. | |
Stage of Development: 15 mm Green to Tight Cluster
Powdery Mildew (Pears)
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) 32918 | 19 | 259 - 926 ml | 104 - 374 ml | 0 days | Suppression 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) 33405 | 3 | 0.25 - 0.375 L | 0.1 - 0.15 L | 12 hours | 0 | Do 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) 33099 | NC | 10 L/1000 L of water | 10 L/1000 L of water | 12 hours | 0 | Test 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. |
| garlic powder (Buran) 30601 | NC | 9 L/500 to 800 L of water | 9 L/500 to 800 L of water | 0 | Disease control can be achieved under low to moderate disease pressure. Begin applications when conditions are conducive to disease development. The addition of a registered non-ionic surfactant such as Agral 90 or AgSurf at a rate of 0.1% could help to improve the spreading. | |
Stage of Development: Petal fall or Calyx
Powdery Mildew (Pears)
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.