2018 Crop Protection Guide for Tree Fruits in Washington

Bioregulator Sprays

Thursday, May 24, 2018

Bioregulators: Apple - Postbloom

See General Recommendations for guidelines on table use. Read all product labels carefully.
Most post-bloom thinners may be applied in combination with each other for additional thinning-check individual product labels for specific guidelines.


 All
apple
varieties
REIPHI

Product

Except where noted, rates are amount per acre (amount per 100 gallons in dilute sprays; concentration) 
Amid-Thin W
NAD

-- (2.4-8 fl oz; 15-50 ppm)

48 h

NL
Exilis 9.5 SC
6-BA

-- (9.6-25.6 oz; 75-200 ppm)

12h

86d
Exilis Plus
6-BA

-- (46-122 fl oz; 75-200 ppm)

12 h

86 d
Fruitone N
NAA

-- (1.2-8 fl oz; 3-20 ppm)

48 h

2 d
K-Salt Fruit Fix 200
NAA

-- (0.48-4.8 fl oz; 2-20 ppm)

48 h

2 d
K-Salt Fruit Fix 800
NAA

-- (0.12-1.2 fl oz; 2-20 ppm)

48 h

2 d
MaxCel
6-BA

-- (48-128 fl oz; 75-200 ppm)

12 h

86 d
Motivate
ethephon

1.5-6 pt (--; --)

48/72 h

7d
PoMaxa
NAA

-- (0.5-4 fl oz; --)

48 h

2d
Refine 6.25L
NAA

-- (0.48-4.8 fl oz; 2-20 ppm)

48 h

2 d
Sevin 4F
carbaryl

1-3 qt (--; --)

12 h

3 d


Amid-Thin W: NAD may cause formation of pygmy fruit in Red Delicious - use of alternative materials such as NAA is advised.

Exilis 9.5 SC: Total annual application may not exceed 182 grams BA (308 fl oz of MaxCel, 296 fl oz Exilis Plus, 61.6 oz Exilis 9.5SC) per acre.

Exilis Plus: Total annual application may not exceed 182 grams BA (308 fl oz of MaxCel, 296 fl oz Exilis Plus, 61.6 oz Exilis 9.5SC) per acre.

Fruitone N: Use lower rates if tank mixing with a surfactant - consult product labels for details. Note that appropriate rates vary widely between product formulations; double check labels to ensure proper concentrations.

K-Salt Fruit Fix 200: Use lower rates if tank mixing with a surfactant - consult product labels for details. Note that appropriate rates vary widely between product formulations; double check labels to ensure proper concentrations.

K-Salt Fruit Fix 800: Use lower rates if tank mixing with a surfactant - consult product labels for details. Note that appropriate rates vary widely between product formulations; double check labels to ensure proper concentrations.

MaxCel: Total annual application may not exceed 182 grams BA (308 fl oz of MaxCel, 296 fl oz Exilis Plus, 61.6 oz Exilis 9.5SC) per acre.

Motivate: For best results, use ethephon in combination with other postbloom thinners. Efficacy may be improved by acidifying spray tank to pH 3-5.

PoMaxa: Use lower rates if tank mixing with a surfactant - consult product labels for details. Note that appropriate rates vary widely between product formulations; double check labels to ensure proper concentrations.

Refine 6.25L: Use lower rates if tank mixing with a surfactant - consult product labels for details. Note that appropriate rates vary widely between product formulations; double check labels to ensure proper concentrations.

Sevin 4F: Do not apply when bees are actively foraging; remove hive from orchard. Other formulations of carbaryl may be even more toxic to bees (see http://www.tfrec.wsu.edu/pages/cpg/Bee_Protection). Early applications may contribute to fruit deformities in some strains of Red Delicious - check individual product labels for more guidance. Total annual application may not exceed 15 quarts per acre.


 

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