2018 Crop Protection Guide for Tree Fruits in Washington

Pear Programs

Sunday, June 24, 2018

Pear at Delayed-dormant

See General Recommendations for guidelines on table use. Read all product labels carefully.
Apply before new growth is exposed to minimize spray injury.

= link to additional information in Orchard Pest Management


 Grape
mealybug
Pear
psylla
Pear
rust
mite,
pearleaf
blister
mite
San
Jose
scale
REIPHIModeMRL

Product

Except where noted, rates are amount per acre
Efficacy if estimate is available (+ to ++++)
 
Asana XL
esfenvalerate
+ petroleum oil- dormant
--
1 pt
1-1.5 % v/v
-- --
12 h
12 h

28 d
NL

3A
 

 
Assail 70WP
acetamiprid
+ petroleum oil- dormant
--
2.3-3.4 oz
1-1.5 % v/v
-- --
12 h
12 h

7 d
NL

4A
 

 
Diazinon 50W
diazinon
+ petroleum oil- dormant

4 lb
1.5 % v/v
-- -- --
4 d
12 h

21 d
NL

1B
 

 
Dimilin 2L
diflubenzuron
+ petroleum oil- dormant
--
40-48 fl oz
1-1.5 % v/v
-- --
12 h
12 h

14 d
NL

15
 

 
Esteem 35WP
pyriproxyfen
-- -- --
4-5 oz
+++(+)

12 h

45 d

7C
Esteem 35WP
pyriproxyfen
+ petroleum oil- dormant
--
5 oz
1-1.5 % v/v
-- --
12 h
12 h

45 d
NL

7C
 

 
Lorsban Advanced
chlorpyrifos
+ petroleum oil- dormant

4 pt
1.5 % v/v
-- --
4 pt
1-1.5 % v/v
++++

4 d
12 h

NL
NL

1B
 

 
Sevin 4F
carbaryl
+ petroleum oil- dormant
-- --
3 pt
1-1.5 % v/v
--
12 h
12 h

3 d
NL

1A
 

 
Surround WP
kaolin clay
+ petroleum oil- dormant
--
25-50 lb
1-1.5 % v/v
-- --
4 h
12 h

0 d
NL

 
 
 
 
lime sulfur/calcium polysulfide -- -- See label -- 48 hNL   
lime sulfur/calcium polysulfide
+ petroleum oil- dormant
-- See label
1-1.5 % v/v
-- -- 48 h
12 h
NL
NL
 
 
 
 
petroleum oil- dormant -- 1-1.5 % v/v
++(+)
-- 1-1.5 % v/v
+++(+)
12 hNL   
sulfur, dry flowable -- -- See label -- 24 hNLM2  
sulfur, dry flowable
+ petroleum oil- dormant
-- See label
1-1.5 % v/v
-- -- 24 h
12 h
NL
NL
M2
 
 
 

Pear psylla: Pyrethroid resistance is present in many areas and may severely reduce efficacy of esfenvalerate. Note: Insect growth regulators Dimilin and Esteem are most effective when applied prior to significant egg deposition. See label.


sulfur, dry flowable: Do not apply to Anjou pears.

Lorsban Advanced: Do not make more than one application of chlorpyrifos per year.

petroleum oil- dormant: Use no more than 5 gals. oil per acre in concentrate sprays. In areas where pears are susceptible to oil injury, reduce dosage so that no more than 5 gals. per acre are applied during the prebloom period. If scale is a problem, use a dilute spray. Use handgun for hard-to-cover problem areas.

Surround WP: Apply two to three applications between dormant/delayed dormant and first bloom. Coverage of green tissue is important; apply every 2-3 weeks or as needed to cover new tree growth.


 

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