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Kenja fungicide label expanded to help manage rusty root disease on ginseng

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The Pest Management Regulatory Agency (PMRA) recently approved a minor use label expansion registration for Kenja fungicide for control of rusty root disease in Canada. Kenja fungicide was already labeled for disease control on a wide range of crops in Canada. This minor use proposal was submitted by Agriculture & Agri-Food Canada, Pest Management Centre (AAFC-PMC) 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 Kenja fungicide.

 

Crop(s)

Target

Rate (L of product / ha)

Application Information

PHI (days)

Ginseng

Control of Cylindrocarpon root rot (Rusty Root Disease) (Ilyonectria morspanacis syn. Cylindrocarpon destructans)

1.46 (584 g a.i./ha)

Initiate applications within 2 weeks of plant emergence and/or prior to disease development and continue at 7-day intervals if conditions continue to be favorable for disease development. Use 1000 to 1870 L/ha of spray volume to ensure runoff into the soil and root zone. Do not make more than 2 sequential applications of KENJA 400SC FUNGICIDE or other Group 7 containing fungicides before rotating to a fungicide with a different mode of action.  Do not apply more than 3 applications per year.

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

 

For a copy of the new minor use label, contact your local specialty crops specialist, your regional supply outlet, or visit the PMRA label site http://www.hc-sc.gc.ca/cps-spc/pest/registrant-titulaire/tools-outils/label-etiq-eng.php

 

 

 

 

 

Source:  Joshua Mosiondz, minor use coordinator, Ontario Ministry of Agriculture, Food and Agribusiness. 

 

 

 

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Submitted by Karen Davidson on 4 February 2026