Abstract
The herbicides dichlobenil (Koopman and Daams 1960, Barnsley and Rosher 1961) and chlorthiamid (Yates 1961) are closely related, especially as conversion of chlorthiamid to dichlobenil occurs in soils (Milborrow 1965). The two compounds have a similar range of uses although they are not necessarily interchangeable. They are both soil-acting herbicides and are highly effective against a wide range of broad-leaved and grass weeds including types such as Tussilago, Aegopodium, Rumex, and Equisetum spp. which are difficult to eradicate. The outlets for one or other of the compounds include the control of weeds in top- or bush-fruit such as apples, pears, blackcurrants, raspberries, and particularly vines. Selective control of Rumex spp. in pastures and of weeds in cranberry bogs is possible. The herbicides have also been used for the control of weeds in wheat and rice although the margin of tolerance is smaller than with some other crops. Dosage levels of up to eight to 12 kg./ha. are recommended for application to soils for weed control in top- and bush-fruit and applications are likely to be made once each year, generally during spring, to uncultivated soil. The compounds may also be used for total weed control in non-crop situations, and dosages of up to 20 kg./ha. are recommended. There is in addition some interest in the use of these compounds for the control of aquatic weeds.
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Beynon, K.I., Wright, A.N. (1972). The fates of the herbicides chlorthiamid and dichlobenil in relation to residues in crops, soils, and animals. In: Gunther, F.A., Gunther, J.D. (eds) Residue Reviews. Residue Reviews / Rückstands-Berichte, vol 43. Springer, New York, NY. https://doi.org/10.1007/978-1-4615-8485-8_2
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