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Apple Calendar: Late Bloom to Petal Fall (Calyx)

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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  4. For more Information

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

fire blight cankerLate Bloom/Early Petal Fall

Diseases and Insects

  • Fire blight (Suppression shoot blight stage)

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Apogee - 1.35 kg

Comments

Apogee is a plant growth regulator that reduces vegetative growth in the tree, making the tree less susceptible to fire blight infections of shoots. Apogee has no impact on blossom blight or the fire blight bacteria. Apogee should be applied in late bloom or early petal fall when shoots are 2.5 to 5.5 cm long. Accurate timing of application is critical. Apogee will help suppress fire blight infections from this point on. Re-apply spray 14-21 days later.

In plantings with low vigour, a reduction in shoot growth caused by the high rate of Apogee for fire blight suppression, may be undesirable.   

For more information on the use of Apogee to manage fire blight refer to "Management Notes", on page 115.

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developing secondary scab lesionsPetal Fall (Calyx) when most petals have fallen

Diseases and Insects

  • Scab

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Use 1 of the fungicides recommended at Bloom.

Comments

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

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Black rot on fruitDiseases and Insects

  • Black Rot

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Use 1 of the fungicides listed at Pink.

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adult tentiform leafminerDiseases and Insects

  • Tentiform leafminer

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Agri-Mek 1.9% EC - 750 mL
  • Admire 240 F - 380 mL
  • Assail 70 WP - 80g
  • *Pounce - 520 mL
  •  *Decis 5 EC - 250 mL
  • *Ripcord 400 EC - 250 mL
  • *Matador 120 EC - 83 mL
  • Lannate - 1.60 kg

Comments

Agri-Mek: Apply when 1st sap-feeding mine is detected, 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/ha. Agri-Mek plus oil may cause russeting to Golden Delicious and other light-skinned cultivars. Do not use Agri-Mek plus oil within 14 days of Captan or Maestro application. Maximum 1 application Agri-Mek per season. Agri-Mek plus oil is best applied alone. Also controls ERM and TSSM.

Admire or Assail: Apply when sap feeders are present. Will also control other sap-feeding insects at this timing. Alternate Assail or Admire with insecticides from different chemical families.

Maximum 4 applications Assail per season.

Maximum 2 applications Admire per season.

*Pyrethroids (Pounce, Ripcord, Decis Matador): In years where leafminer egg hatch is delayed, a pyrethroid can be applied at petal fall when 1st sap-feeding mine is detected. This treatment also controls tarnished plant bug and spring feeding caterpillars. Do not apply pyrethroids more than once per season. Pyrethroids are highly toxic to beneficial insects, and may lead to outbreaks of European red mite.

Lannate: Apply when 1st tissue-feeding mine is detected on the upper surface of the cluster leaves. Do not apply to Early McIntosh or Wealthy varieties.

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Rosy apple aphid colonyDiseases and Insects

  • Rosy apple aphid

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Admire 240 F - 230 mL
  • Assail 70 WP - 120 g
  • Pirimore 50 DF - 1.70 kg
  • Zolone Flo - 2.00 L

Comments

Admire or Assail applied at this time also control other sap feeding insects. Maximum 4 applications Assail per season. Maximum 2 applications Admire per season.

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

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adult mullein bugDiseases and Insects

  • Mullein leaf bug

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Admire 240 F - 380 mL
  • Diazinon 50 W - 3.23 kg
  • Lannate - 1.60 kg

Comments

Timing is critical. Admire applied at this time also controls green apple aphid, rosy apple aphid, white apple leafhopper, and tentiform leafminer. Maximum 2 applications Admire per season.

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Adult male San Jose scaleDiseases and Insects

  • Oystershell scale
  • San Jose scale

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Guthion Solupak - see label
    or Sniper - see label

Comments

Apply when the crawlers are active.

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adult plum curculioDiseases and Insects

  • Plum curculio

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Guthion Solupak - see label
    or Sniper - see label
  • Imidan 50 WP - 3.75 kg
  • Zolone Flo - 3.00 L
  • Surround WP - 50.0 kg

Comments

Guthion, Sniper, Imidan, and Zolone: will provide subsequent control of caterpillars.

Surround: Make 2 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. See "Using Surround as a Pest Management Tool" page 104.

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European apple sawflyDiseases and Insects

  • European apple sawfly

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Guthion Solupak - see label
    or Sniper - see label

Comments

Apply as a special spray to orchards where there has been a history of damage.

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European Red MiteDiseases and Insects

  • European red mite

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Agri-Mek 1.9% EC - 750 mL
  • Apollo SC - 300 mL
  • Carzol SP - 1.10 kg
  • Acramite 50 WS - 851 g or 3.75 pouches
  • Envidor 240 SC - 750 mL

Comments

Do not apply any miticide more than once per season Agri-Mek: Apply when mites are in the nymph stage, no later than 21 days after petal fall. Apply with 10 L Superior 70 Oil and a minimum of 1,000 L of water /ha. Agri-Mek plus oil may cause russeting to Golden Delicious and other light-skinned varieties. Do not use Agri-Mek plus oil within 14 days of a Captan or Maestro application. Ideally, alternate yearly with other early season miticides (e.g., Superior 70 Oil, Apollo). Agri-Mek also controls tentiform leafminer.

Apollo kills mite eggs. Apply when mites are mostly in the egg stage and before there are more than 3 active mites per leaf. Thorough coverage is essential for good control. Apply Apollo alone in a minimum of 1,100 L of water/ha.

Carzol is harsh on beneficial insects, mites and bees.

Envidor has slow activity and results may not be apparent for up to 1 week.

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late summer fruit blister spotsDiseases and Insects

  • Blister Spot

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Aliette WDG - 2.00 kg

Comments

Begin applications at petal fall with 1 to 2 subsequent sprays at 7-day intervals. Do not mix with copper compounds. 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 * Bioprotect CAF - 4.00 L
  • Success 480 SC - 182 mL
  • Confirm 240 F - 1.00 L
  • Lannate - 1.60 kg
  • Intrepid 240 F - 500 mL

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, Confirm and Intrepid 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. 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.

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

Lannate: Lannate is most effective on 4th and 5th instar larvae. Maximum 1 application per season.

*B.t. products (Dipel, Foray, Bioprotec) Make 2 applications of at 5 to 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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oriental fruit moth damage on a fruitDiseases and Insects

  • Oriental fruit moth

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Intrepid 240 F - 1.00 L
  • *Decis 5 EC - 250 mL
  • Assail 70 WP - 240 g

Comments

See Oriental Fruit Moth on page 110. Apply as a special spray to orchards where there is a history of damage. Timing is critical for effective control, use monitoring results to adjust spray timing.   Begin applications at peak egg hatch based on pheromone trap counts and degree days.

Assail: Maximum 4 applications per season.

* Pyrethroids (Decis) Maximum 1 pyrethroid per season. Pyrethroids are highly toxic to beneficial insects and may lead to outbreaks of European red mite. Use only as a last resort.

Intrepid: Apply 2 to 3 days earlier than conventional pesticides.

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powdery mildew damage on fruitDiseases and Insects

  • Powdery mildew

Materials and Amount/ha trees 4.5 - 5.5 m high

  • Use 1 of the fungicides listed at Tight cluster to pink.

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