2018 Crop Protection Guide for Tree Fruits in Washington

Bioregulator Sprays

Sunday, November 18, 2018

Bioregulators: Apples - Bearing

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


 To
decrease
preharvest
fruit
drop,
delay
watercore
and
improve
harvest
maturity
management
To
increase
fruit
size
To
promote
longer,
typy
Red
Delicious
To
suppress
fruit
russet
Vegetative
growth
control
in
apple
REIPHI

Product

Except where noted, rates are amount per acre (amount per 100 gallons in dilute sprays; active ingredient per acre; concentration) 
Apogee PGR
prohexadione calcium
-- -- -- --
6-24 oz (--; --; --)

12 h

45 d
Exilis 9.5 SC
6-BA
--
-- (1.3-6.4 fl oz; --; 10-50 ppm)
-- -- --
12h

86d
Exilis Plus
6-BA
--
-- (6-30 fl oz; --; 10-50 ppm)
-- -- --
12 h

86 d
Kudos 27.5 WDG
prohexadione calcium
-- -- -- --
6-24 oz (--; --; --)

12 h

45d
MaxCel
6-BA
--
-- (6-32 fl oz; --; 10-50 ppm)
-- -- --
12 h

86 d
NovaGib 10L
GA4+7
-- -- --
-- (20-33 fl oz; --; --)
--
4 h

NL
Perlan
GA4+7+BA
-- --
0.5-2 pt (--; --; --)
-- --
4 h

NL
ProVide 10SG
GA4+7
-- -- --
-- (2.1-3.5 oz; --; 15-25 ppm)
--
4 h

NL
Promalin
GA4+7+BA
-- --
0.5-2 pt (--; --; --)
-- --
4 h

NL
ReTain
AVG

0.73 lb (0.73 lb; 50 g AI; --)
-- -- -- --
12 h

7 d

To promote longer, typy Red Delicious: Apply when first blossoms are open, but not within 6 hours before or after rain. Can cause excess thinning on young trees.

To suppress fruit russet: Apply in no more than 100 gallons of water per acre per application beginning at petal fall and continuing every 7-10 days up to 4 applications. Do not exceed 80 fl oz Novagib 10L per acre per year.

Vegetative growth control in apple: Apply starting at 1 inch shoot growth, repeat at 14- to 21-day intervals. Do not apply within 45 days of harvest. Use 300 gal of dilute spray/acre.


Exilis 9.5 SC: Make 2–4 applications starting at petal-fall and repeating at 3- to 10-day intervals. Apply when temperatures will exceed 65°F for a few days following application. Do not apply within 86 days of harvest. Follow all label instructions.

Exilis Plus: Make 2–4 applications starting at petal-fall and repeating at 3- to 10-day intervals. Apply when temperatures will exceed 65°F for a few days following application. Do not apply within 86 days of harvest. Follow all label instructions.

MaxCel: Make 2–4 applications starting at petal-fall and repeating at 3- to 10-day intervals. Apply when temperatures will exceed 65°F for a few days following application. Do not apply within 86 days of harvest. Follow all label instructions.

ReTain : ReTain: Apply 4 weeks before anticipated start of single pick harvest or 1-2 weeks before start of multiple pick harvest depending on harvest schedule. A spray volume of 100 gallons per acre is suggested. Adjust to ensure adequate coverage. Do not exceed 50 grams ai per acre (one bag of formulated material). Use with registered surfactants. Refer to text.


 

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