|Author: ||D.W. Robinson|
Effective control of weeds can help significantly to improve the quality of amenity plantings.
Weeds adversely affect ornamental plants visually and biologically but the harm resulting from moisture shortage due to root competition with weeds is often unrecognized.
A wide range of weedkillers is now available for use in woody ornamentals but no soil-acting herbicide can give complete control of weeds over a period of years.
The use of soil-acting herbicides must be supplemented by the timely use of directed applications of other herbicides (usually translocated) and by suitable cultural control measures.
The routine use of soil-acting herbicides, depending on the particular weed problem, in conjunction with appropriate action against surviving weeds, can greatly reduce the high cost of weed control in amenity plantings.
Three new herbicides - napropamide, oxyfluorfen and glufosinate - of value to amenity land managers have been introduced recently.
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