Phostrol fungicide label expanded for hazelnuts

The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration for Phostrol fungicide for suppression of Phytophthora root rot (Phytophthora spp.) on hazelnuts in Canada. Phostrol fungicide was already labeled for management of diseases on a wide range of crops in Canada. This minor use proposal was submitted by the British Columbia Ministry of Agriculture, Food, and Fisheries as a result of minor use priorities established by growers and extension personnel. 


The following is provided as an abbreviated, general outline only. Users should be making disease management decisions within a robust integrated disease management program and should consult the complete label before using Phostrol fungicide.




(L product/ha)

Application Information

PHI (days)


Phytophthora root rot (Phytophthora spp.)

2.9 – 5.8 

For preventative suppression of phytophthora root rot begin foliar, drench, or drip irrigation applications when conditions are favourable for disease (i.e. wet conditions or at early symptoms of disease).  Continue on a 14 day interval up to a maximum of 4 applications per year.


To reduce runoff from treated areas into aquatic habitats avoid application to areas with a moderate to steep slope, compacted soil, or clay. Avoid application when heavy rain is forecast. Contamination of aquatic areas as a result of runoff may be reduced by including a vegetative strip between the treated area and the edge of the water body.


Follow all other precautions, restrictions, and directions for use on the Phostrol fungicide label carefully.


For a copy of the new minor use label contact your regional supply outlet, or visit the PMRA label site:


Source:  Josh Mosiondz, minor use coordinator, OMAFRA. 

If latest news: 
Check if it is latest news (for "Latest News" page)
Publish date: 
Monday, December 20, 2021

Click to leave a comment

For security purposes, please confirm you are not a robot!


Entomologists rank Cormoran insecticide as top choice

A new survey conducted by the USDA National Institute for Food and Agriculture shows that entomologists in 10 states prefer Cormoran insecticide in fighting spotted wing drosophila.

Koppert reveals new branding

The Netherlands-based, biological crop control company has changed its logo and visual identity after nearly 30 years. The new branding matches Koppert’s forward-looking ambition and reflects the company’s connection to nature.

Reduced supplies of linuron expected for 2022

The Pest Management Regulatory Agency has worked with the manufacturer of linuron to allow distribution for 2022. TKI/NovaSource will update on quantities in a few weeks. 

Vineland launches Biological Crop Protection research services

Vineland can support the introduction and use of new products as well as integrated pest management solutions to growers on a fee-for-service basis. Multi-disciplinary research expertise is available in biological control, biochemistry and plant production. 

Today’s crop protection: A piece of cake!

Compared to 20 years ago, growers have multiple tools and in-depth information available today to diagnose and treat field problems writes Québec-based columnist Luc Bérubé.