Phoma macrostoma |

Last updated: 24/08/2025
|
 |
(Also known as: Didymella macrostoma) |
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. These hazard alerts do not take account of usage patterns or exposure, thus do not represent risk.
Environmental fate |
Ecotoxicity |
Human health |
  |
  |
  |
|
A naturally occuring common fungi that is an effective bioherbicide for broadleaved weed reduction |
|
- |
|
- |
|
- |
|
- |
|
Kingdom: Fungi; Phylum: Ascomycota; Class: Dothideomycetes |
|
Not approved |
|
No applicable |
|
No UK approval for use as a plant protection agent |
EC Regulation 1107/2009 (repealing 91/414) |
|
No approved |
|
- |
|
Not applicable |
|
Not applicable |
|
No |
|
ATAustria |
BEBelgium |
BGBulgaria |
CYCyprus |
CZCzech Republic |
DEGermany |
DKDenmark |
EEEstonia |
ELGreece |
  |
  |
  |
  |
  |
  |
  |
  |
  |
ESSpain |
FIFinland |
FRFrance |
HRCroatia |
HUHungary |
IEIreland |
ITItaly |
LTLithuania |
LULuxembourg |
  |
  |
  |
  |
  |
  |
  |
  |
  |
LVLatvia |
MTMalta |
NLNetherlands |
PLPoland |
PTPortugal |
RORomania |
SESweden |
SISlovenia |
SKSlovakia |
  |
  |
  |
  |
  |
  |
  |
  |
  |
|
|
ISIceland |
NONorway |
|
|
|
|
|
|
|
  |
  |
  |
  |
  |
  |
  |
  |
  |
|
|
Not applicable |
|
- |
|
- |
|
- |
|
- |
|
- |
|
No |
|
Herbicide |
|
Fungi |
|
- |
|
- |
|
Natural |
|
Releases a phytotoxin that, when absorbed by germinating seedlings, destroys the seedling’s ability to absorb nutrients |
|
Phoma macrostoma was first discovered on Canada thistle (Cirsium arvense). |
|
Plant protection |
|
Broad-leaved weeds |
|
Lawns, Grass seedlings, Field grown nursery plants, trees and ornamentals, Wheat, Corn, Potato |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
|
Phoma macrostoma Montagne 94-44B |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
|
Not applicabl |
|
Not applicable |
|
- |
|
- |
|
|
|
Current |
|
2016, first registered in Canada |
|
- Scotts
- Premier Tech
- Evologic Technologies
|
|
|
|
Often formulated as granules |
|
Commercial production of Phoma macrostoma involves cultivating the organism under controlled fermentation conditions to produce its active metabolites, particularly macrocidins, which inhibit chlorophyll biosynthesis in broadleaf weeds. The process begins with isolating a high-performing strain and growing it in nutrient-rich media optimised for fungal biomass and metabolite yield. Scaling up production has posed challenges due to the need for consistent quality, viable spore concentration, and cost-effective manufacturing. |
|
- |
|
|
|
|
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
|
- |
- |
- |
|
- |
- |
- |
|
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
|
|
|
|
- |
|
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
|
|
- |
- |
- |
|
- |
|
|
- |
- |
- |
|
- |
|
|
- |
- |
- |
|
- |
|
|
- |
- |
- |
|
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
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. |
|
- |
Soil adsorption and mobility |
|
None
Terrestrial ecotoxicology |
|
|
|
|
|
- |
- |
- |
|
|
- |
- |
- |
|
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
|
- |
- |
- |
|
- |
- |
- |
|
|
- |
- |
- |
|
- |
- |
- |
|
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
|
|
- |
- |
- |
- |
|
- |
- |
- |
- |
|
|
- |
- |
- |
|
- |
- |
- |
|
|
- |
- |
- |
|
- |
|
|
- |
- |
- |
|
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
|
|
|
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
HUMAN HEALTH AND PROTECTION |
|
|
|
|
|
|
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
- |
- |
- |
|
|
- |
|
- |
|
- |
- |
- |
|
Carcinogen |
|
Endocrine disruptor |
No data found |
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 ; E0 E = Unspecified genotoxicity type (miscellaneous data source) 0 = No data |
No data found |
Reproduction / development effects |
Acetyl cholinesterase inhibitor |
Neurotoxicant |
No data found |
No data found |
No data found |
Respiratory tract irritant |
Skin irritant |
Skin sensitiser |
No data found |
No data found |
?Possibly, status not identified |
Eye irritant |
Phototoxicant |
  |
No data found |
No data found |
  |
|
|
No information available |
|
|
|
No information available |
|
- |
|
Not listed (Not listed) |
|
- |
|
- |
|
- |
|
|
|
Phoma macrostoma |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
|
- |
Record last updated: |
24/08/2025 |
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 |