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Apple Calendar: Tight Cluster to Bloom

Author: OMAFRA Staff
Creation Date: 25 June 2007
Last Reviewed: 25 June 2007
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Extract of Publication 360, Fruit Production Recommendations , Order this publication

Cover of Publication 360, Fruit Production RecommendationsTable of Contents

  1. Apple Calendar
  2. Pub 360 Chapter 7 - Apples - Apple Calendar - (Pdf format 1.17 Mb)
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Apple Calendar

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.

Check Table 7-7, Days to Harvest Intervals for Products Used on Apples

adult tentiform leafminerTight cluster to pink

Diseases and Insects

  • Tentiform leafminer

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Assail 70 WP - 80 g
  • *Pounce - 520 ml
  • *Decis 5 EC - 250 ml
  • *Ripcord 400 EC - 250 ml
  • * Matador 120 EC - 83 ml
  • Confirm 240 F - 1.00 L
  • Intrepid 240 F - 500 ml

Comments

Consult agriphone for timing (if available).

Assail: Maximum 4 applications per season.

Confirm or Intrepid: Apply at 1st egg hatch. Confirm suppresses leafminer populations. Continue monitoring after application. Maximum 2 applications of Confirm or Intrepid per season.

*Pyrethroids (Pounce, Decis, Ripcord, Matador) :  also control spring feeding caterpillars and tarnished plant bugs. Do not apply a pyrethroid more than once per season. Pyrethroids are highly toxic to beneficial insects and may lead to outbreaks of European red mite.

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developing secondary scab lesionsDiseases and Insects

  • Scab

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Use 1 of the fungicides listed at Half-inch green to tight cluster.

Comments

See also Control of Apple Scab Under Adverse Weather Conditions on page 121.

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powdery mildew damage on fruitDiseases and Insects

  • Powdery mildew

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Nova 40 W - 340 g
  • Nustar - 200 g
  • Sovran 240 g
  • Dikar 6.75 kg
  • Microscopic sulphur - see label
  • Kumulus DF - 22.50 kg
  • Flint 50 WG - 140 g

Comments

Begin application at tight cluster and continue to First summer spray. If powdery mildew was prevalent the previous year, apply fungicides beginning at Green tip. Additional sprays beyond First summer spray may be needed on susceptible varieties or if disease pressure is severe. See Table 7-15, Examples of Apple Cultivars Susceptible to Key Diseases, on page 122.

Nova or Nustar: Maximum 4 applications per season. See  Use of Demethylation Inhibitor (DMI) Fungicides (sterol-inhibitors)  on page 120.

Flint or Sovran: Maximum 4 applications per season.

See Use of Strobilurin Fungicides on page 120.

Sulphur or Kumulus:  Do not use on Delicious because these products can cause an increase in red mite and scale insect populations.

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Quince rust on fruitDiseases and Insects

  • Cedar apple rust
  • Quince rust

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Ferbam 76 WDG - see label
  • Dikar - 6.75 kg
  • Polyram DF - 6.00 kg
  • Dithane DG - 6.00 kg
    or Penncozeb 75 DF- see label
  • Nova 40 W - 340 g
    plus Dithane DG     - 3.00 kg
  • Flint 50 WG - 140 g

Comments

Include in each spray up to and including First summer spray.

Ferbam may cause russeting on Golden Delicious and other sensitive varieties.

Nova: Maximum 4 applications per season.

Flint: Maximum 4 applications per season.

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adult Tarnished plant bugDiseases and Insects

  • Plant bugs

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Ripcord 400 EC - 250 mL
  • matador 120 EC - 104 mL

Comments

The application of pre-bloom or petal fall pyrethroids to manage teniform leafminer will suppress tarnished plant bugs.

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green fruitworm and damaged appleDiseases and Insects

  • Spring-feeding caterpillars
  • Green fruitworm

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Imidan 50 WP - 3.75 kg
  • Guthion Solupak - see label
    or Sniper - see label
  • Zol1 Flo - 2.00 L

Comments

This spray is not necessary if a pyrethroid was applied for tentiform leafmine.
Do not apply Zolone more than 3 times per season.

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Pink

developing secondary scab lesionsDiseases and Insects

  • Scab

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Use 1 of the fungicides listed at Half-inch green to tight cluster

Comments

See Control of Apple Scab Under Adverse Weather Conditions on page 121.

Learn more:

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Black rot on fruitDiseases and Insects

  • Black Rot

Materials and Amount/ha trees 4.5 - 5.5 m high

  • maestro 80 DF - 3.75 kg
  • Supra Captan 80 - 3.75 kg
    WDG

Comments

Do not use oil within 14 days of Maestro or Captan.

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European Red MiteDiseases and Insects

  • European red mite

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Carzol SP - 1.10 kg

Comments

Miticides are most effective when used alone. Carzol is harsh on beneficial mite species and bees. Application before Petal fall is preferred.

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Rosy apple aphid colonyDiseases and Insects

  • Rosy apple aphid

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Pirimor 50 DF- 1.70 kg
  • Assail 70 WP - 120 g
  • Zol1 Flo - 2.00 L

Comments

Preferred time for control. See section on Bee Poisoning on page 79.

Pirimor: Maximum 2 applications per season. Some countries have zero tolerance for Pirimor residues on fruit. Check with your packer before applying this material.

Assail : Maximum 4 applications per season.

Zolone: Maximum 3 applications per season.

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Mature Obique-banded leafroller larvaeDiseases and Insects

  • Obliquebanded leafroller

Materials and Amount/ha trees 4.5 - 5.5 m high

  • *Dipel 2X DF - 1.12 kg
    or *Foray 48BA - 2.80 L
    or *Bioprotec CAF - 4.00 L
  • Success 480 SC - 182 mL
  • Confirm 240 F - 1.00 L

Comments

See Obliquebanded leafroller on page 109. When applied for leafroller control, these products also control other caterpillars.

In most commercial orchards obliquebanded leafroller (OBLR) populations are resistant to organophosphate insecticides. Cross resistance to pyrethroids and Confirm has been documented in some populations. In orchards where pesticide resistance is suspected, use Bacillus thuringiensis (B.t.) (Dipel, Foray or Bioprotect), or the naturolyte insecticide Success 480 SC.

Success: Monitor populations and re-apply as necessary on a 7-10 day schedule. Spray solution should be above pH 6.0. Maximum 3 applications per season.

Confirm: Accurate timing of Confirm is important. See label for specific timing. Maximum 2 applications times per season.

*Bt products (Dipel, Foray, Bioprotec): Make 2 applications of B.t. products at 5-7 day intervals if activity of the larvae is extended. For best results when using B.t. products, acidify spray mix to below pH 7.0 and apply at dusk or on overcast days.

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Avoid treating sequential generations with the products from the same chemical family. See Table 4-1, Insecticide and Miticide Groups Based on Sites of Action, on page 48.

Bloom

Do not apply insecticides while apple trees are in bloom. See bee poisoning on page 79.

developing secondary scab lesionsDiseases and Insects

  • Scab

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Polyram DF - 6.00 kg
  • Supra Captan 80 WDG - 3.75 kg
    or Maestro 80 DF - 3.75 kg
  • Dikar - 6.75 kg
  • Manzate DF - 6.00 kg
    or Dithane DG - 6.00 kg
    or Penncozeb 75 DF - see label
  • Sovran - 240 g
  • Nova 40 W - 340 g
    plus Dithane DG - 3.00 kg
  • Nova 40 W - 340 g
    plus Polyram DF - 3.00 kg
  • Nova 40 W - 340 g
    plus Maestro 80 DF - 1.90 kg
  • Nustar - 100 g
    plus Manzate 200 DF - 3.00 kg
  • Flint 50 WG - 140 g

Comments

See Control of Apple Scab Under Adverse Weather Conditions on page 121.

Sovran or Flint: Do not use earlier than Tight cluster. Apply in blocks of 2 applications, 10 days apart. Use another chemical family for 2 applications before returning to these products. See Table 4-2, Fungicide/Bactericide Groupings Based on Sites of Action, on page 49. After last application of Sovran or Flint, tissue is protected from infection for 5-8 days. In conditions of rapid growth, shorten intervals between applications. Check label for details.

Maximum 4 applications Sovran or Flint per season.

See Use of Strobilurin Fungicides on page 120 and Use of Demethylation Inhibitor (DMI) Fungicides (sterol-inhibitors) on page 120.

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fire blight cankerDiseases and Insects

  • Fire blight

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Streptomycin 17 - 600 g/1,000 L

Comments

Sprays are most effective when applied dilute (high volumes of water) prior to a wetting period. Use alone for best results. Streptomycin 17 is UV light sensitive and is only effective for 2 to 3 days. Re-application is needed after 2 to 3 days if warm, wet conditions (above 20oC) prevail. 2 to 3 sprays during bloom may be required for fire blight control. Do not apply streptomycin more than 3 times per season. See Fire Blight on page 114 for details.

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