March 2, 2010 – The Pest Management Regulatory Agency (PMRA) recently
approved a User Requested Minor Use Label Expansion (URMULE) registration for
Previcur N Aqueous Solution Fungicide for control of root rot caused by Pythium and Phytophthora on outdoor grown
and greenhouse ornamentals in Canada. Specific crops noted include rose,
azalea, rhododendron, holly, geranium, poinsettia, African violet, gerbera,
cyclamen and snapdragon. Previcur N was already labeled for control of Pythium on greenhouse vegetables in Canada.
The minor use project for greenhouse ornamentals was originally
initiated in early 2000 by Victoria Brooks of Agriculture and Agri-Food Canada
in B.C. as a result of minor use priorities established by growers and
extension personnel in Canada. After many years of significant challenges and
obstacles with this project, enduring support from the registrant and
stakeholders, the minor use label expansion for Previcur N Aqueous Solution
Fungicide is a significant step towards developing a more robust and
sustainable pest management toolkit for these diseases in Canada.
The following is provided as a general outline only. Users should
consult the complete label before using Previcur N Fungicide.
Previcur N Fungicide can be used for control of root rot caused by Pythium by applying a single application at potting time at
1.5 mL Previcur per litre of water at 100 mL of solution per 10 cm pot. Two
repeat applications can be made 21 to 40 days apart if disease pressure warrants.
Previcur N Fungicide can be used for control of root rot caused by Phytophthora by mixing 1.5 mL Previcur per litre of water
and using 4.9 L of mixed solution per square metre of surface area. Two repeat
applications can be made 21 to 40 days apart if disease pressure warrants.
Previcur N Fungicide should be applied as a drench to the root zone of
the plants in such a way that plant foliage does not get wet. Do not re-enter
treated areas within 24 hours of application of soil direction applications.
Previcur N Fungicide should be used in an integrated pest management
program and in rotation with other management strategies to adequately manage
resistance. Follow all other precautions and directions for use on the Previcur
N Fungicide label carefully.
The minor use project for greenhouse ornamentals was sponsored
originally by Victoria Brooks and re-submitted by the minor use office of
OMAFRA as a result of on-going minor use priorities established by producers in
Canada. We also wish to thank the personnel of Bayer CropScience Canada Inc.
for their support of this registration and the personnel of the Pest Management
Regulatory Agency for evaluating and approving this important pest management
For a copy of the new minor use label contact Jim Chaput, OMAFRA,
Guelph (519) 826-3539, Graeme Murphy, OMAFRA greenhouse floriculture IPM
specialist at Vineland (905) 562-4141 ext. 106; or visit the Plant Products website
Jim Chaput is the OMAFRA Minor Use Coordinator and works out of the