Читать книгу Herbicides and Plant Physiology - Andrew H. Cobb - Страница 35

It is outside the scope of this book to examine the finer details of weed control. Instead, a broad overview is presented. The reader is referred to other, more comprehensive texts for further information, such as Naylor (2002).

According to Lacey (1985), weed control encompasses:

1 the reduction of the competitive ability of an existing population of weeds in a crop;

2 the establishment of a barrier to the development of further significant weeds within that crop; and

3 the prevention of weed problems in future crops, either from the existing weed reservoir or from additions to that weed flora.

The first two objectives are met primarily by chemical means, and the third relies on agronomy and crop husbandry. Cultural practices are forever changing, along with the weed spectrum, and it is now increasingly recognised that an integrated approach utilising both cultural and chemical practices is necessary for optimal weed control.