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Casoron: dichlobenil

Author: OMAFRA Staff
Creation Date: 25 November 2002
Last Reviewed: 21 January 2008
Pub 75: Guide to Weed Control > Notes on Herbicides > Casoron: dichlobenil
Excerpt from Chapter 4, Publication 75, Guide to Weed Control, Order this publication
Trade Names
Casoron 4G
Formulation Gr
Guaranteed active concentration 4%
Groups  20
Ontario Schedule 3
Winter Storage C
Chemical Family Benzonitrile.
Crop and/or Non-Crop Registrations Cranberries, fruit trees, grapes, highbush blueberries, raspberries, container nursery stock, woody nursery stock, shelterbelts and non-crop areas.
Sensitive Weeds Most weeds are susceptible to or suppressed by, dichlobenil including perennials, vetch and horsetail.
Uptake and Translocation Absorbed by the roots and rapidly translocated upward in the plant.
Basis of Selectivity  Selectivity is based on physical separation between the dichlobenil vapour layer in the top 5 cm of soil and the established crop roots below this level.
Application Methods Applied preemergence to the weeds, preferably in either fall or early spring.
Residual Activity May persist and provide weed control for 2-6 months; higher rates and applications following use in previous year(s) may result in soil residues persisting for longer than 1 year.
Unique Characteristics Although applied as a granular herbicide it kills by means of a vapour phase in the top soil profile. Weed roots take up the herbicide as they enter this zone. Do not apply dichlobenil during periods of high soil temperature, since loss of control will result due to volatilization of the herbicide.
Manufacturer / Registrant Uniroyal Chemical

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