2018 Crop Protection Guide for Tree Fruits in Washington

Apple Programs

Sunday, June 24, 2018

Apple at Pink

See General Recommendations for guidelines on table use. Read all product labels carefully.
See section on hazards to bees. Do not apply Class I bee toxicants when blossoms are open or after hives have been placed in the orchards.

= link to additional information in Orchard Pest Management


 Campylomma
Codling
moth
Leafrollers
(Pandemis,
Obliquebanded)
Rosy
apple
aphid
Apple
rust
mite
REIPHIModeMRL

Product

Except where noted, rates are amount per acre
Efficacy if estimate is available (+ to ++++)
 
Altacor 35WDG
chlorantraniliprole
-- --
4.5 oz
-- --
4 h

5 d

28
Assail 70WP
acetamiprid

1.7-3.4 oz
-- --
1.7 oz
--
12 h

7 d

4A
Bacillus thuringiensis subsp. kurstaki -- -- See label
+++
-- -- 4 h0 d11B2  
Belt 4SC
flubendiamide
-- --
5 fl oz
-- --
12 h

14 d

28
CM pheromone dispensers -- See label -- -- -- none listedNL   
Intrepid 2F
methoxyfenozide
-- --
16 fl oz
+++
-- --
4 h

14 d

18A
Envidor 2SC
spirodiclofen
-- -- -- --
18 fl oz

12 h

7 d

23
Vendex 50WP
fenbutatin oxide
-- -- -- --
1-1.5 lb
+++(+)

48 h

14 d

12B

table continues below...

Apple rust mite: Apply when problem exists on Golden Delicious.

Campylomma: If campylomma nymphs are detected prior to bloom apply treatment immediately. Apply in late evening or at night.

Codling moth: Pheromone treatments typically need to be supplemented with insecticides to achieve acceptable levels of control. Any insecticide recommended for control of codling moth can be used as a supplement to pheromone treatments. Timing of different insecticides used as supplements for codling moth control in pheromone treated orchards depends on the stages they impact, eggs or larvae. Refer to the Petal-fall, 14-28 days after Full Bloom, and Late Spring and Summer timing periods for specific recommendations.

Leafrollers (Pandemis, Obliquebanded): Pre-bloom applications of pesticides at this timing can be effective and will also conserve natural enemies for leafroller and biological control agents of other pests, such as aphids.  Consult the WSU Decision Aid Sytem models for leafrollers for optimal timing.  

If Bt is used follow recommendations on weather periods when this pesticides has the best chance to work effectively.   


Assail 70WP: Use highter rates for high population numbers.

Bacillus thuringiensis subsp. kurstaki: Bts are stomach poisons so complete coverage is very important for control. Two or three applications are usually required. Apply when forecasts predict a warm weather pattern, above 65 degrees, for 3 or more days.

CM pheromone dispensers: Most apple growers in Washington use some kind of hand-applied pheromone dispenser to help control codling moth. The number of dispensers per acre will depend on the product used and pest pressure. Hand-applied pheromone dispensers must be in place before the first moth flight, that is prior to bloom. Dispensers should be placed within the top 2 feet of the tree canopy. It is strongly recommended that full label rate of any hand-applied pheromone dispenser be used. Reducing the rate of dispensers per acre will reduce efficacy and result in more damage from codling moth or require the use of more insecticides to achieve acceptable control. Different kinds of hand-applied pheromone dispensers release pheromone at different rates over time. Some dispensers may need to be reapplied late in the season or supplemented with insecticides if pheromone runs low.

Some apple growers are using aerosol pheromone emitters (CheckMate CM-O Puffer and Isomate CM MIST) to control codling moth. This technology is used at a rate of one pheromone emitter per acre. WSU research has shown that the aerosol emitter technology works as good as a full rate (400 dispensers per acre) of a hand-applied dispenser technology.  However, the borders of orchards need to be treated with hand-applied pheromone dispensers to cover gaps resulting from the number of aerosol emitters that are applied per acre.  


 

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 Apple
mildew
Apple
scab
REIPHIModeMRL

Product

Except where noted, rates are amount per acre
Efficacy if estimate is available (+ to ++++)
 
Aprovia
benzovindiflupyr

5.5-7 fl oz

5.5-7 fl oz

12 h

30 d

7
 
Dithane M45 80W
mancozeb; (pre-bloom schedule)
--
6 lb

24 h

77 d

M3
Flint 50W
trifloxystrobin

2-2.5 oz

2-2.5 oz

12 h

14 d

11
Fontelis
penthiopyrad

14-20 fl oz

14-20 fl oz

12h

28d

7
 
Inspire Super
cyprodinil+difenoconazole

12 fl oz

12 fl oz

12h

14d

9,3
 
Polyram 80DF
metiram
--
See label

24 h

77 d

M3
 
Rally 40WSP
myclobutanil

5 oz

5 oz

24 h

14 d

3
Sonata
Bacillus pumilus strain QST 2808

2-4 qt
--
4 h

0 d

 
 
Sovran 50WG
kresoxim-methyl

4-6.4 oz

4-6.4 oz

12 h

30 d

11
Topguard
flutriafol

8-12 fl oz

13 fl oz

12 h

14d

3
Ziram 76DF
ziram
--
See label

48 h

14 d

M3
lime sulfur/calcium polysulfide See label See label48 hNL   
sulfur, dry flowable -- See label24 hNLM2  
triflumizole 8-16 fl oz8-16 fl oz12 h14 d3

Apple mildew: For best results, wait until a few king blossoms are open.


Aprovia: Do not make successive applications of Aprovia and Fontelis  to reduce fungicide resistance development.

Dithane M45 80W: Do not apply after bloom. See label for restrictions.

Flint and Sovran: To limit the potential for development of fungicide resistance, do not make more than four applications of strobilurin fungicides per season. Do not make more than two sequential applications of strobilurin fungicides. This limitation is inclusive to all strobilurin fungicides labeled for use on pome fruits.

Fontelis: See note for Aprovia.

Inspire Super: Do apply after or before Procure 480SC or Rally 40WSP to minimize fungicide resistance in powdery mildew and other non-target pathogens.

triflumizole: See note for Inspire Super and Rally.

Rally 40WSP: See note for Inspire Super and Procure.

Sonata: Organic fungicide

Sovran 50WG: See note for Flint.

lime sulfur/calcium polysulfide: Toxic to rust mites, the primary alternate prey of predatory mites. Also toxic to spider mites and predatory mites.

Topguard: Topguard may cause a mild phytotoxicity on Braeburn apple leaves.

Ziram 76DF: Beside having some activity against scab, Ziram may reduce bull's eye rot inoculum persisting on cankers from previous season.


 

Tree Fruit Research & Extension Center, 1100 N Western Ave, Washington State University, Wenatchee WA 98801, 509-663-8181, Contact Us