Macrocystis integrifolia extract |

Last updated: 31/01/2025
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(Also known as: kelp extract; giant kelp extract; giant bladder kelp extract; Macrystis pyrifera extract) |
The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.
Environmental fate |
Ecotoxicity |
Human health |
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A brown sea algae rich in phytohormones and nutrients used as a biostimulant to promote productivity and crop quality |
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Growth; Stress; Quality |
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All agricultural and horticultural crops |
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Macrocystis integrifolia is a brown macroalgae which may have potential as a biostimulant. It is rich in growth promoting substances such as natural phytohormones which have the ability to boost the plants ability to withstand stress. There are various published studies where improved crop performance, yield increases and enhanced stress resilience have been observed with a variety of different crops including fruit, beans, tomatoes and wheat. It has also been shown to improve fruit set in tomatoes. |
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Current |
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Found widely in subtropical, temperate, and sub-Antarctic oceans of the Southern Hemisphere and in the northeast Pacific |
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The production of Macrocystis integrifolia extract biostimulant involves a specialized extraction process designed to preserve the bioactive compounds and nutrients. Once harvested an innovative extraction process called Cold State Cell Disruption is used that causes the cell walls of the seaweed to rupture, releasing the cell contents without using high temperatures or aggressive chemicals. The liquid extract is then concentrated and finally undergoes an ultrasound application to fully mix and homogenize the final product. |
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Not approved |
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Not applicable |
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No UK approval for use as a pesticide |
EC Regulation 1107/2009 (repealing 91/414) |
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Not approved |
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Not applicable |
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Not applicable |
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Not applicable |
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No |
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ATAustria |
BEBelgium |
BGBulgaria |
CYCyprus |
CZCzech Republic |
DEGermany |
DKDenmark |
EEEstonia |
ELGreece |
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ESSpain |
FIFinland |
FRFrance |
HRCroatia |
HUHungary |
IEIreland |
ITItaly |
LTLithuania |
LULuxembourg |
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LVLatvia |
MTMalta |
NLNetherlands |
PLPoland |
PTPortugal |
RORomania |
SESweden |
SISlovenia |
SKSlovakia |
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Not applicable |
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Yes |
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Other substance |
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Biostimulant - growth enhancement & improved abiotic stress resiliance |
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Plant-derived substance; Marine algae-based biostimulant |
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Class: Phaeophyceae; Order: Laminariales; Family: Laminariaceae |
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Natural |
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As a biostimulant, Macrocystis integrifolia extract stimulates endogenous reactions improving plant stress tolerance and development. Biostimulant activity is accredited to its high concentrations of phytohormones, nutrients, antioxidants and osmoprotectants. It has also been reported to have a strong absorption and accumulation of localised salts and minerals which may be beneficial in stressed environments. |
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Macrocystis integrifolia extract |
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Not applicable |
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Not applicable |
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Not applicable |
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Not applicable |
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Green liquid |
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- KelpGrow set
- KelpGrow IR
- KelpGrow life
- Vhera life
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Usually formulated as a liquid concentrate for foliar application |
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As this parameter is not normally measured directly, a surrogate measure is used: ‘Photochemical oxidative DT₅₀’. Where data is available, this can be found in the Fate Indices section below. |
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Soil adsorption and mobility |
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Cannot be calculated |
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None
Terrestrial ecotoxicology |
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HUMAN HEALTH AND PROTECTION |
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EU MRL pesticide database |
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Carcinogen |
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Endocrine disruptor |
XNo, known not to cause a problem |
A0 A = Chromosome aberration (EFSA database) 0 = No data ; B0 B = DNA damage/repair (EFSA database) 0 = No data ; C0 C = Gene mutation (EFSA database) 0 = No data ; D0 D = Genome mutation (EFSA database) 0 = No data ; E3 E = Unspecified genotoxicity type (miscellaneous data source) 3 = Negative |
XNo, known not to cause a problem |
Reproduction / development effects |
Acetyl cholinesterase inhibitor |
Neurotoxicant |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
Respiratory tract irritant |
Skin irritant |
Skin sensitiser |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
Eye irritant |
Phototoxicant |
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XNo, known not to cause a problem |
XNo, known not to cause a problem |
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No adverse human health effects have been identified |
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Not flammable |
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None allocated |
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Not regulated |
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Sable under ambient conditions |
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Macrocystis integrifolia extract |
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Record last updated: |
31/01/2025 |
Contact: |
aeru@herts.ac.uk |
Please cite as: |
Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242 |