2017 Crop Protection Guide for Tree Fruits in Washington

Apple Programs

Tuesday, January 23, 2018

Apple at Preharvest

See General Recommendations for guidelines on table use. Read all product labels carefully.

= link to additional information in Orchard Pest Management


 Apple
maggot
Codling
moth
Leafrollers
(Pandemis,
Obliquebanded)
Apple
scab
Bull's
eye
rot
REIPHIModeMRL

Product

Except where noted, rates are amount per acre
Efficacy if estimate is available (+ to ++++)
 
Assail 70WP
acetamiprid

3.4 oz

3.4 oz
-- -- --
12 h

7 d

4A
Bacillus thuringiensis subsp. kurstaki -- -- See label
+++
-- -- 4 h0 d11B2  
Delegate 25WG
spinetoram
--
6-7 oz
++++
-- -- --
4 h

7 d

5
Entrust SC
spinosad
--
10 fl oz
-- -- --
4 h

7 d

5
Imidan 70W
phosmet

5.33 lb
-- -- -- --
7 d

7 d

1B
Sevin 4F
carbaryl
--
2 pt
++
-- -- --
12 h

3 d

1A
petroleum oil, summer -- See label -- -- -- 4 h0d   
Topsin M 70WP
thiophanate-methyl
-- -- -- --
1 lb

2 d

1 d

1
Ziram 76DF
ziram
-- -- --
See label

See label

48 h

14 d

M3
captan -- -- -- 6 lb6 lb24 h0 dM4

table continues below...

Codling moth: Use carbaryl or acetamiprid near harvest or on late-maturing varieties to prevent fruit damage from codling moth where pressure is high.

Apple scab: Sprays may not be necessary unless the disease pressure is high especially on the westt side of the Cascades.

Bull's eye rot: Topsin-M is ONLY recommended under wet conditions and for cultivars susceptibel to bull's eye rot. Frequent sprays may increase risks of resistance development to Mertect, a fungicide from the same group as Topsin-M (1) used after harvest.


Delegate 25WG: Delegate is effective against codling moth larvae. It has a residual activity of 14 days.

Bacillus thuringiensis subsp. kurstaki: Bts are stomach poisons so complete coverage is very important for control. Two or three applications are usually required.

captan: When applicable, tank-mix with other single-site fungicides to reduce risk fo fungicide resistance development.

Topsin M 70WP: Topsin M and Mertect belong to the same class of fungicide. If Mertect is routinely used as a postharvest treatment at the packinghouse, do not use Topsin M as a preharvest spray in the field.

Ziram 76DF: When applicable, tank-mix with other single-site fungicides to reduce risk fo fungicide resistance development.


 

continued


 Storage
rots
REIPHIModeMRL

Product

Except where noted, rates are amount per acre
Efficacy if estimate is available (+ to ++++)
 
Merivon
pyraclostrobin+fluxapyroxad

5.5 fl oz

12 h

0 d

11,7
 
Pristine
pyraclostrobin+boscalid

14.5-18.5 oz

12 h

0 d

11,7
Topsin M 70WP
thiophanate-methyl

1 lb

2 d

1 d

1
Ziram Granuflo 76WDG
ziram

6 lb

48 h

14 d

M3

Storage rots: A ground applied, dilute application leading to excellent fruit coverage is essential for control of storage rots.


Merivon: For pre-harvest applications (days before harvest) do not use Merivon with, before or after Pristine.

Pristine: To limit the potential for development of fungicide resistance, do not make more than four applications of Groups 11  and 7 fungicides per season. Do not make more than two sequential applications of Groups 7 and 11 fungicides. This limitation is inclusive to all group 7 and 11 fungicides labeled for use on pome fruits.

Topsin M 70WP: Topsin M and Mertect belong to the same class of fungicide. If Mertect is routinely used as a postharvest treatment at the packinghouse, do not use Topsin M as a preharvest spray in the field.

Ziram Granuflo 76WDG: When applicable, tank-mix with other single-site fungicides to reduce risk fo fungicide resistance development.


 

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