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Publication 360, Fruit Production
Recommendations: Apple Calendar - Half-inch Green to Tight Cluster
 Table
of Contents
- European red mite
- Rosy apple aphid
- Scab
- Powdery Mildew
- Oriental fruit moth
- Precautions
- Learn more
- Other Apple Calendar sections
- Other Information on Apples
- Chapter 4: Apple
Calendar - PDF 357 kb
- Related Links
European
red mite (Half-inch Green to Tight Cluster)
- Materials: Superior 70 Oil @ 20 L of oil/1,000
L of water
- Comments: Superior 70 Oil:
Oil may cause bark injury on Red Delicious, Empire and Mutsu.
Apply oil for the control of European red mite before overwintering
eggs hatch. Usually the best timing is between Half-inch
green to tight cluster when temperatures are getting warmer.
Do not apply full rate of oil more than once per season. Apply
oil in 2,000-3,000 L of water per ha. 3,000 L gives best results.
On large standard trees, use 90 L of oil in 4,500 L of water
per ha. Do not use oil within 14 days of Captan or Maestro.
- For more information - Ontario
CropIPM: European Red Mite
Rosy
apple aphid (Half-inch Green to Tight Cluster)
Spray if 20 or more clusters in a 100-cluster sample are infested.
- Materials: Use one of:
- Assail 70 WP @ 120 g/ha
- Actara 25 WG @ 160 g/ha
- Comments: Assail and Actara:
Both are in the same chemical family and should not be
used in rotation. Maximum 4 neonicotinoid applications
per season. Repeated use of some neonicotinoids may result
in mite outbreaks.
- 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 fields.
- Movento 240 SC @ 365 mL/ha
- Comments: Movento: Has slow activity;
control may not be apparent for 2-3 weeks. Under high
pest pressure a second application may be necessary 2
weeks later. See the Movento label for additional details.
Do not tank-mix with sulfur.
- For more information - Ontario
CropIPM: Rosy Apple Aphid
Scab
(Half-inch Green to Tight Cluster)
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. The following products are compatible with oil:
Polyram DF, Dithane DG, and Manzate DF. When mixing fungicides with
oil, add fungicide to tank when 1/4 to 1/2 full of water and mix
thoroughly. Add Superior 70 Oil last when tank is at least 1/2 full
of water. Do not use oil within 14 days of Captan or Maestro.
- 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/ha 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
- Comments: 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
- Comments: Sovran, Flint, Nova,
Nustar and Pristine: Should not be used earlier
than Tight
cluster. After last application tissue is protected
from infection for 5-8 days. In conditions of rapid growth,
shorten intervals between applications. Check labels for
details. Do not use once apple scab is present. Use of
these products as eradicants may result in the development
of fungicide resistance.
- Vangard 75 WG @ 370 g/ha
- Scala SC @ 1.00 L/ha
- For more information - Ontario
CropIPM: Scab
Powdery
Mildew (Half-inch Green to Tight Cluster)
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.
- 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
- For more information - Ontario
CropIPM: Powdery Mildew
Oriental
fruit moth (Half-inch Green to Tight Cluster)
 Management
of OFM is only necessary in orchards where there is a history of
damage. Timing is critical for effective control. Mating disruption
products are not insecticides, and will not control other pests.
Initial OFM population must be low for good results. Apply to square
or rectangular orchard blocks at least 4 ha. in size, before a given
generation of OFM flight begins. Outbreaks of other pests may occur
when insecticides are not used for OFM. Monitoring is extremely
important where using mating disruption. Insecticides may be needed
in late varieties where high OFM populations exist.
- Materials: Use one of:
- Isomate M100 @ 250 dispensers/ha
- Comments: Isomate M100: Dispensers
release pheromone for up to 90 days. Make a second application
75-80 days after initial application for late season varieties.
- Isomate Rosso @ 500 dispensers/ha
- Comments: Isomate Rosso:
Provides control for up to 120 days.
- For more information - Ontario
Crop IPM: Oriental Fruit Moth
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. Check Table
4-7. Products Used on Apples.
Products are listed according to insecticide and fungicide
family groups. Use products from different family groups to
prevent pest resistance.
Learn more:
Related Links
For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca
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