Publication 360, Fruit Production Recommendations: Apple Calendar - First Summer Spray (7-14 days after Petal Fall (Calyx))

Publication 360, Fruit Production Recommendations:
Apple Calendar - First Summer Spray (7-14 days after Petal Fall (Calyx))

Pub 360, Fruit Production Recommendations > Apples > Apple Calendar > First Summer Spray (7-14 days after Petal Fall (Calyx))

Excerpt from Publication 360, Fruit Production Recommendations 2010-11,
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Scab
Plum Curculio
Fire Blight
European Red Mite and Two-spotted Spider Mite
Rosy Apple Aphid
Powdery Mildew
Blister Spot
Oriental Fruit Moth
Codling moth (1st generation)
Precautions
Learn more
Other Apple Calendar sections
Other Information on Apples
Chapter 4: Apple Calendar - PDF 357 kb
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Scab (First Summer Spray (7-14 days after Petal fall (Calyx))

An extra scab spray may be required between Petal fall (Calyx) and First summer spray. See Control of apple scab under adverse weather conditions. Resistance to Group 3 and Group 11 fungicides has been confirmed in Ontario. Check the status of these products before using them in your orchard.

Materials: Use one of:
- Manzate Pro-stick @ 6.00 kg/ha or Dithane DG @ 6.00 kg/ha or Penncozeb 75 DF @ see label
- Polyram DF @ 6.00 kg/ha
- Supra Captan 80 WDG @ 3.75 kg or Maestro 80 DF @ 3.75 kg/ha
- Dikar @ 6.75 kg/ha
- Sovran @ 240 g/ha
- Flint 50 WG @ 140 g/ha
- Pristine WG @ 1.0-1.2 kg/ha
  - Comment: Pristine: Use the higher rate and a shorter interval during periods of rapid growth or when disease pressure is high.
- Nova 40 W @ 340 g + Dithane DG @ 3.00 kg/ha
- Nova 40 W @ 340 g + Polyram DF @ 3.00 kg/ha
- Nova 40 W @ 340 g + Maestro 80 DF @ 1.90 kg/ha
- Nustar @ 100 g + Manzate Pro-stick @ 3.00 kg /ha
  - Comment: Sovran, Flint, Pristine, Nova, Nustar: Do not use earlier than Tight cluster. See Table 2-11. Fungicide/Bactericide Groupings Based on Sites of Action. After last application of Sovran, Flint, Nova or Nustar tissue is protected from infection for 5-8 days. In conditions of rapid growth, shorten intervals between applications. Check label for details. Do not use Nova, Nustar, Flint, Pristine or Sovran if apple scab is present. Use of these products as eradicants may result in the development of fungicide resistance.
  - Comment: Serenade MAX: Provides suppression of apple scab. See Table 2-6. Efficacy Ratings for Pesticides, and notes on Serenade MAX, Bacillus subtilis (Serenade ASO, Serenade MAX).
For more information - Ontatio CropIPM: Scab

Plum curculio (First Summer Spray (7-14 days after Petal fall (Calyx))

Materials: Use one of:
- Actara 25 WG @ 385 g/ha
  - Comments: Actara: Highly toxic to bees exposed to direct treatment or to residues on blooming crops and weeds. Do not apply during bloom, and wait at least 5 days after treatment before placing beehives in or near treated orchards.
- Calypso 440 EC @ 440 mL/ha
  - Comments: Actara, Calypso: Optimal timing is at petal fall plus 3 days. However if monitoring indicates plum curculio is in the orchard prior to this timing, then insecticides should be applied at petal fall. Do not use Calypso/Actara in border sprays. Note that some neonicotinoids are toxic to bees. Repeated use of some neonicotinoids may result in mite outbreaks. Use a maximum of two neonicotinoid applications per season.
- Imidan 50 WP @ 3.75 kg/ha
- Zolone Flo @ 3.00 L/ha
- Guthion 50 WSB @ see label or Sniper @ see label
  - Comments: Guthion, Sniper, Imidan, and Zolone: Apply immediately at petal fall, or when monitoring indicates plum curculio is in the orchard.
- Surround WP @ 50.0 kg/ha
  - Comments: Surround: Must be applied before plum curculio is present in orchard. Make two applications, 7 days apart, at 50 kg/ha, to establish a base layer. Continue at 7-14 day intervals, using a reduced rate of 25 kg/ha, to maintain even coverage of developing fruits. Do not use Surround in border sprays. See notes on Kaolin Clay (Surround WP).
For more information - Ontatio CropIPM: Plum curculio

Fire blight (First Summer Spray (7-14 days after Petal fall (Calyx))

Materials: Streptomycin 17 @ 600 g/1,000 L
- Comments: Apply to control shoot blight especially if blossom blight hasoccurred.
For more information - Ontatio CropIPM: Fire blight

European red mite and Two-spotted spider mite (First Summer Spray (7-14 days after Petal fall (Calyx))

Thorough coverage is essential for good control with miticides. See Table 4-9. Activity of Miticides Registered on Apple and/or Pear in Ontario. Do not apply any miticide more than once per season. To prevent development of pesticide resistance, rotate products from different groups. See Strategies for managing resistance to insecticides.

Materials: Use one of:
- Agri-Mek 1.9% EC @ 750 mL/ha
  - Comments: Agri-Mek: Apply when there are 5-7 mites/leaf timed for 50% egg hatch. Apply when mites are in the nymph stage, no later than 21 days after petal fall. Apply with 10 L of Superior 70 Oil and a minimum of 1,000 L of water per ha. Agri-Mek plus oil may cause russeting on Golden Delicious and other light-skinned cultivars. Do not apply within 14 days of Captan or Maestro application. Ideally, alternate yearly with other early season miticides (e.g. Superior 70 Oil, Apollo).
- Acramite 50 WS (for european red mite) @ 851 g/ha or 3.75 pouches/ha
- Acramite 50 WS (for spider mite) @ 567 g/ha or 2.5 pouches/ha
- Envidor 240 SC @ 0.75 L/ha
  - Comments: Agri-Mek and Envidor: Also control rust mites.
  - Comments: Envidor: Activity is slow; control may not be apparent for up to one week.
- Kanemite 15 SC @ 2.1 L/ha
  - Comments: Acramite, Envidor and Kanemite: Should be applied when there are five or more active mites per leaf before bronzing occurs.
- Apollo SC @ 300 mL/ha
  - Comments: Apollo: Apply no later than 14 days after petal fall. Apollo kills mite eggs. Apply when mites are mostly in the egg stage and before there are more than three active mites per leaf. Thorough coverage is essential for good control. Apply Apollo alone in a minimum of 1,100 L of water per ha.
For more information - Ontatio CropIPM: European red mite, Two-spotted spider mite

Rosy apple aphid (First Summer Spray (7-14 days after Petal fall (Calyx))

Controls should be applied if 20 or more infested clusters are present in a sample of 100 clusters. See comments at Petal fall.

Materials: Use one of:
- Admire 240 F @ 230 mL/ha or Alias 240 SC @ 230 mL/ha

Assail 70 WP @ 120 g/ha
Actara 25 WG @ 160 g/ha
Movento 240 SC @ 365 mL/ha
Zolone Flo @ 2.00 L/ha

For more information - Ontatio CropIPM: Rosy apple aphid

Powdery mildew (First Summer Spray (7-14 days after Petal fall (Calyx))

If powdery mildew was a problem in previous years, then an application of a fungicide is necessary at this time. Spray susceptible varieties. If powdery mildew was prevalent the previous year, apply fungicides beginning at Green tip. Otherwise, begin application at Tight cluster and continue to First summer spray. Additional sprays beyond First summer spray may be needed on susceptible varieties or if disease pressure is severe.

Materials: Use one of:
- Nova 40 W @ 340 g/ha
- Nustar @ 200 g/ha
  - Comments: Nova, Nustar: These products do not control scab and should be tank-mixed with a protectant fungicide. See options for apple scab control at Half-inch green to tight cluster.
- Sovran @ 240 g/ha
- Flint 50 WG @ 140-210 g/ha
  - Comments: Flint: For powdery mildew control, use 210 g/ha during pink to bloom stage.
- Pristine WG @ 1.0-1.2 kg/ha
  - Comments: Pristine: Use the higher rate and a shorter interval during periods of rapid growth or when disease pressure is high.
- Dikar @ 6.75 kg/ha
- Microscopic Sulphur @ see label
- Kumulus DF @ 22.5 kg/ha
  - Comments: Microscopic Sulphur, Kumulus: Do not use on Delicious because these products can cause an increase in red mite and scale insect populations.
  - Comments: Serenade MAX: Provides suppression of apple scab. See Table 2-6. Efficacy Ratings for Pesticides, and Bacillus subtilis (Serenade ASO, Serenade MAX).
For more information - Ontatio CropIPM: Powdery mildew

Blister spot (First Summer Spray (7-14 days after Petal fall (Calyx))

Apply preventatively to Mutsu, Golden Delicious and other susceptible varieties.

Materials: Use one of:
- Copper 53 W - 3.00 kg/ha
  - Comments: Copper 53 W: To reduce the incidence of blister spot lesions, apply up to three sprays beginning 10 days after petal fall. Use hydrated lime to reduce the risk of phytotoxicity at a rate of 6 kg per 1 kg of Copper 53 W per 1,000 L of water. Apply in 3,000 L of water per ha.

Aliette WDG - 2.00 kg/ha

Comments: Aliette: Begin applications at petal fall and spray at 7 day intervals. Do not mix with copper compounds. Use a maximum of three applications per season.

For more information - Ontatio CropIPM: Blister spot

Oriental fruit moth (First Summer Spray (7-14 days after Petal fall (Calyx))

Refer to mating disruption comments listed under Half-inch green to tight cluster.

Materials: Use one of:

Isomate-M 100 @ 250 dispensers/ha
- Comments: Isomate-M 100: Make a second application of 75-80 days after the first.
Isomate-M Rosso @ 500 dispensers/ha
- Comments: Isomate-M Rosso: Will provide control for up to 120 days.

For more information - Ontatio CropIPM: Oriental fruit moth

Codling moth (1st generation) (First Summer Spray (7-14 days after Petal fall (Calyx))

Timing is critical for effective control. Use pheromone traps to time sprays. Apply insecticides between 83-138 DDC (base 10°C) after first sustained moth catch. See Degree-day modeling and determining a biofix, page 8. Some products also control apple maggot or other pests. See Table 4-10. Activity of Insecticides and Miticides on Apple Pests.

Materials: Use one of:
- Intrepid 240 F @ 1.00 L/ha
- Confirm 240 F @ 1.00 L/ha
  - Comments: Intrepid and Confirm: Apply Intrepid or Confirm 2-3 days earlier than OP insecticides (83-111 DDC). Intrepid residues last 14 or more days. Do not apply as a border spray.
- Assail 70 WP @ 170 g/ha
- Calypso 480 EC @ 440 mL/ha
  - Comments: Assail and Calypso: Apply 1-2 days earlier (at 111-138 DDC) than OP insecticides. Calypso/Assail residues last 10-14 days. Do not apply as a border spray.
- Altacor @ 215 g/ha
- Delegate WG @ 420 g/ha
  - Comments: Altacor and Delegate: Apply at 138 DDC. Residues last 10-14 days. Do not apply as a border spray.
- Imidan 50 WP @ 3.75 kg/ha
- Guthion 50 WSB @ see label or Sniper @ see label
- Zolone Flo @ 2.00 L/ha
  - Comments: Imidan, Guthion, Sniper, Zolone (OP insecticides): Apply for first generation codling moth at 138 DDC.
  - Comments: Virosoft CP4 (granulosis virus): A biopesticide that is provides suppression of codling moth. For more information on this product, see Biopesticides and reduced risk products for insect control and notes on Cydia pomonella granulosis virus (Virosoft).
For more information - Ontatio CropIPM: Codling moth

Precautions

Read the product label and follow all safety precautions.

Consult the product label for suggested water volumes. Otherwise, use enough water to ensure thorough spray coverage. Where the product rate is listed in amount per 1,000 L, and if a water volume is not provided on the label, use enough water to wet the foliage to the near drip point.

For information on identifying pests and monitoring apple orchards, refer to OMAFRA Publication 310, Integrated Pest Management for Apples.

Products are listed according to insecticide and fungicide group. Use products from different groups to prevent the development of pest resistance. For resistance management, refer to Pest Resistance to Insecticides, Fungicides, Miticides.
For preharvest interval, re-entry period, maximum number of applications and chemical group, see Table 4-7. Products Used on Apples.

Learn more:

Notes on Apple Diseases

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