2018 Crop Protection Guide for Tree Fruits in Washington

Bioregulator Sprays

Sunday, July 22, 2018

Bioregulators: Apples - Nonbearing

See General Recommendations for guidelines on table use. Read all product labels carefully.
Young, non-bearing trees


 To
promote
lateral
branching
(1-3
in
terminal
growth)
To
promote
lateral
branching
(bud
swell)
REIPHI

Product

Except where noted, rates are amount per 100 gallons in dilute sprays (concentration) 
Perlan
GA4+7+BA
+ Regulaid
surfactant

0.25-1 pt per 5 gal (125-500 ppm)

1.6-2.4 pt (0.2-0.3 % v/v)
--
4 h

NL

NL

NL
Promalin
GA4+7+BA
+ Regulaid
surfactant

0.25-1 pt per 5 gal (125-500 ppm)

1.6-2.4 pt (0.2-0.3 % v/v)
--
4 h

NL

NL

NL
interior latex paint
+ Perlan
GA4+7+BA
-- -- (--)

0.2-0.33 pt per pt of paint (5000-7500 ppm)
 

4 h
 

NL
interior latex paint
+ Promalin
GA4+7+BA
-- -- (--)

0.2-0.33 pt per pt of paint (5000-7500 ppm)
 

4 h
 

NL

To promote lateral branching (1-3 in terminal growth): Apply at 1 to 3 inches of new terminal growth. Approximately 5 to 10 gallons of spray mixture applied with a pressurized hand sprayer will treat 200 to 300 nonbearing orchard trees 1 to 4 years old. Rate depends on conditions and tree vigor; use higher rates with vigorous trees. Do not use on weak trees or stunted trees on M. 9 rootstocks. NOTE: Do not apply after buds break. Applications after buds have broken may cause some injury to tender shoot tips and fail to promote shoot growth from that point.

To promote lateral branching (bud swell): Apply in spring when terminal buds begin to swell but before green tissues emerge. Apply the GA4+7 + BA-latex paint mixture with a brush or sponge to thoroughly cover the bark surface where growth is desired. Apply only to 1-year-old wood.



 

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