Conyza bonariensis (L.) Cronquist, flaxleaf fleabane, originating from South America, is a

major emerging weed threat for dry-land cropping systems in Australia. Conyza bonariensis

This publication is one of a suite of 13 produced as part of a folder showcasing research from the Defeating the Weed Menace Research and Development program.

The potential for chilling conditions in many Australian cotton growing regions during early growth and development stages demonstrates the need for assessing cold tolerance of cultivars.

Nutgrass (Cyperus rotundus L.), a plant native to India, is known as the world's worst weed .

Establishing a satisfactory stand of cotton is a continuing problem for many growers. Even when the crop is not planted 'too early in terms of the 9: 00 soil temperature there is still a risk involved .