TECHNICAL BULLETIN - FOR PRODUC TION OF TREE, VINE, FIELD AND BERRY CROPS
®
TAMARACK® Plant Nutrient
Introduction
TAMARACK is a specialty plant nutrient based on amino acids and peptide chains
from hydrolyzed proteins. TAMARACK may be applied as a foliar spray or soil
applied via fertigation, drip, or drench. TAMARACK was commercialized in the
1970s and is sold in various countries around the world.
TAMARACK®
Fast Facts
Benefits
• Enhances yield quality
and quantity
• Increases retention of
fruiting forms
• Improves flower set
• Mitigates yield loss
under crop stress
conditions
Key Modes
of Action
• Activates stress
handling genes
• Improves nitrogen
efficiency through
enzyme activation
Application
Method
Foliar spray or soil applied
via fertigation, drip or
drench.
Compatibility
Compatible with most
commonly used fertilizers
and pesticides.
Use Rates
1 to 8 pts/acre*
Application
Number
2 to 3*
Benefits of TAMARACK
•Enhances yield (quantity and quality) under normal and stressed growing
conditions by increasing development and retention of fruit and flower set via
enhancement of pollen germination.
•Mitigates yield losses under stress conditions (salinity, extreme temperatures,
drought, etc.) especially in conjunction with critical plant developmental stages
(i.e. during rapid growth, flowering and/or fruit set).
Mechanisms of Action
•Gene activation - stimulates plant gene response to stress conditions is boosted
by Tamarack for quicker recovery from stress.
•Improves nitrogen use efficiency – activates key plant enzymes involved in nitrogen
metabolism for improved growth and yield.
Use Recommendations
TAMARACK applications may begin as early as the vegetative growth stages
but most importantly should occur during the critical reproductive phases from
flowering to fruit set and during fruit sizing periods.
Rate: 1 to 8 pts/acre*
Application Number: 2 to 3*
Application Timing:
•Permanent Crops: flower formation, flowering, early fruit set and sizing
Compatibility: Tamarack is compatible with most commonly used fertilizers and
pesticides. A jar test may be used to quickly confirm compatibility with specific tank
mixtures.
*Always read and follow the Precautions and Direction for Use as listed on the label.
Application
Timing
Permanent Crops: flower
formation, flowering, early
fruit set and sizing
Almond Bloom Timing
Yield
2000
+212 lb/A
1950
lb/A
1900
Alternate rows were sprayed on 2/10/12
(prebloom) and 2/16/12 (postbloom). Using
$1.75/lb almond meat, the ROI at this location
was $41/acre for every dollar spent.
1850
1800
1750
1700
1650
Standard Grower
Practice
Tamarack 1.5 qt/A
Treatment
Grape\USA (2011)
25
15
14.97
13.79
12.52
18.63
17.8
16.53
18.57
17.71 18.49
18.92 18.84
18.73
3.2
3.1
3.05
30-9
12-10
17-10
3.22
3.15
5
22-9
3.27
3.25
brix stable in this phase
due to low temperatures
and cloudy/rainy weather
10
0
3.3
pH
Brix levels
20
21.39
20.65
20.36
3.08
pH 26-10
26-10
KEY
Tamarack and potassium acetate application improved leaf blade potassium
and brix levels during the period of warm, sunny weather typical of fall. When
cooler, wetter weather began, the combination still provided higher brix levels
and juice pH versus the untreated control.
Untreated Control
Tamarack
Tamarack + K-acetate
®
TAMARACK® is a registered trademark of Isagro USA.
Always read and follow the Precautions and Direction for Use as listed on the label.
©2015 Isagro USA. All Rights Reserved.
ISA 068-4/15
www.isagro-usa.com