Grains and field crops
The objectives of the field experimental programme for 1974 were to - 1) Evaluate a technique to measure pasture loss as a result of doublegee infestation at Merredin, Wongan.Hills and Chapman. 2) Evaluate the effect of cultural and herbicide treatment combinations on the magnitude and distribution of viable doublegee seeds in the soil at Avondale, Merredin, Wongan Hills and Chapman. 3) Measure the magnitude and distribution of viable doublegee seeds in the soil from paddocks representing each year of a two crop, plus three year pastureley rotation at Avondale, Merredin, Wongan Hills and Chapman. 4) Screen herbicides for selective control of doublegee in legume pasture at Avondale, Merredin, Wongan Hills, Mullewa, and Chapman. 5) Evaluate the tolerance of Tournefield medic to Tribunil at Gerald ton. 6) Compare several herbicides with a cultural treatment on doublegees that emerge after late summer rains in an expected "false break" situation at Wongan Hills. 7) A co-operative project with CSIRO was commenced on the biological control of doublegee with the introduction of the weevil Apion antiquum at two wheat-belt sites. Trials - 74A19, 74C6, 74C17, 74GE31, 74M12, 74WH3, 74WH16.
Number of Pages
Gilbey, D J. (1974), 1974 The ecology and control of doublegee (Emex australis) and Emex spinosa. Department of Agriculture and Food, Western Australia, Perth. Report.