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Rootshield HC Biological Fungicide label expanded via Minor Use Program for suppression of Botrytis blight and root rot on Asian water spinach in Canada

Asian Water Spinach

J. Chaput, OMAFRA, Minor Use Coordinator, Guelph

The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration for Rootshield® HC Biological Fungicide for suppression of Botrytis blight caused by Botrytis cinerea and root rot caused by Pythium spp., Rhizoctonia spp. and Fusarium spp. on Asian water spinach in Canada. Rootshield® HC Biological Fungicide was already labeled for use on a wide variety of crops in Canada for control of several diseases.

This is the first ever minor use on Asian water spinach (also known as tung choy, kankon, rao muong) in Canada and was submitted by Ontario 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 pest management decisions within a robust integrated disease management program and should consult the complete label before using Rootshield® HC Biological Fungicide.

Crop(s)TargetRate (kg/ha)Application Information
Asian water spinach (tung choy, kankon, rao muong)Potting mix or soil drench for root rot (Pythium spp., Rhizoctonia spp., Fusarium spp.)55-110 grams per cubic metre of potting mixSuspend RootShield® HC in sufficient water (eg. 30 – 45 g/100 L) to achieve uniform application and apply at the rate of 55 – 110 g per cubic metre (loose) of nursery potting mix, soil or planting beds
Asian water spinach (tung choy, kankon, rao muong)Foliar spray for Botrytis blight (Botrytis cinerea)3.75 – 10 grams per litre of waterRootShield® HC should be applied preventatively prior to onset of disease.
Apply every 7-14 days depending upon disease pressure.

Do not apply or allow drift of Rootshield® HC Biological Fungicide to other crops or non-target areas. Do not contaminate off-target areas or aquatic habitats when spraying or when cleaning and rinsing spray equipment or containers.

Follow all other precautions, restrictions and directions for use on the Rootshield® HC Biological Fungicide label carefully.

For a copy of the new minor use label contact your local crop specialist, 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

Note:  This article is not intended to be an endorsement or recommendation for this particular product, but rather a notice of registration activity

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