2018 Crop Protection Guide for Tree Fruits in Washington

Bioregulator Sprays

Thursday, June 21, 2018

Bioregulators: Apple - Bloom

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


 Difficult
to
thin
varieties
including
Golden
Delicious,
Fuji,
Cameo,
Pacific
Rose
Easy
to
thin
varieties
including
Red
Delicious,
Gala,
Braeburn,
Cripps
Pink,
Jonagold,
Granny
Smith,
Honeycrisp
REIPHI

Product

Except where noted, rates are amount per 100 gallons in dilute sprays (concentration) 
NovaSource Lime Sulfur - blossom thinner
lime sulfur/calcium polysulfide

6-12 gal (6-12 % v/v)

4-10 gal (4-10 % v/v)

48h

NL
NovaSource Lime Sulfur - blossom thinner
lime sulfur/calcium polysulfide
+ fish oil

1-3 gal (1-3 % v/v)
2 gal (2 % v/v)

1-2 gal (1-2 % v/v)
2 gal (2 % v/v)

48h
none listed

NL
NL
NovaSource Lime Sulfur - blossom thinner
lime sulfur/calcium polysulfide
+ petroleum oil, summer

1-3 gal (1-3 % v/v)
1-1.5 gal (1-1.5 % v/v)

1-2 gal (1-2 % v/v)
1-1.5 gal (1-1.5 % v/v)

48h
4 h

NL
0d
NovaSource Lime Sulfur - blossom thinner
lime sulfur/calcium polysulfide
+ petroleum oil- dormant

1-3 gal (1-3 % v/v)
0.5-1 gal (0.5-1 % v/v)

1-2 gal (1-2 % v/v)
0.5-1 gal (0.5-1 % v/v)

48h
12 h

NL
NL
Rex Lime Sulfur- blossom thinner
lime sulfur/calcium polysulfide

6-12 gal (6-12 % v/v)

4-10 gal (4-10 % v/v)

48 h

NL
Rex Lime Sulfur- blossom thinner
lime sulfur/calcium polysulfide
+ fish oil

1-3 gal (1-3 % v/v)
2 gal (2 % v/v)

1-2 gal (1-2 % v/v)
2 gal (2 % v/v)

48 h
none listed

NL
NL
Rex Lime Sulfur- blossom thinner
lime sulfur/calcium polysulfide
+ petroleum oil, summer

1-3 gal (1-3 % v/v)
1-1.5 gal (1-1.5 % v/v)

1-2 gal (1-2 % v/v)
1-1.5 gal (1-1.5 % v/v)

48 h
4 h

NL
0d
Rex Lime Sulfur- blossom thinner
lime sulfur/calcium polysulfide
+ petroleum oil- dormant

1-3 gal (1-3 % v/v)
0.5-1 gal (0.5-1 % v/v)

1-2 gal (1-2 % v/v)
0.5-1 gal (0.5-1 % v/v)

48 h
12 h

NL
NL

All varieties: Apply in sufficient water for full coverage of blossoms (100-200 gal/acre is adequate in most modern plantings). Make applications from 20% full bloom through petal-fall. No more than 3 applications of lime sulfur/oil combinations per growing season.


petroleum oil- dormant: 90--100 viscosity

Rex Lime Sulfur- blossom thinner: Users must sign waiver and join Pest Management Northwest Inc. Lime-sulfur is toxic to both beneficial and harmful mites, and excessive use of sulfur products may disrupt integrated mite control.


 

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