Technical annual report 2000-01
Dept. of Regional Development, Primary Industry, Fisheries and Resources technical annual report; Department of Regional Development, Primary Industry, Fisheries and Resources technical and annual report; Reports; PublicationNT; Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295
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Agriculture -- Northern Territory -- Periodicals; Fisheries -- Northern Territory -- Periodicals
Dept. of Primary Industry and Fisheries
Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295
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Technical Annual Report 2000/01 23 Method: Seven irrigation systems were selected within an area from Larramah, Katherine and Douglas Daly regions. These were assessed for plant composition at three different times. These were: Before any land preparation. After planting and after herbicide application would have had an effect. End of the Wet season when weeds would be reproducing. The method involved the use of a modified GRASS Check system to assess each paddock. This has now been carried out for two consecutive seasons. Table 1 shows the range of species in these areas reflecting the plant species identified and their incidence for two years. The data selected is for the March assessment. Other data is available for September and May. Discussion: Relatively few plants have the characteristics to be true weeds but under intensive irrigation systems plants which are not usually known for their weedy nature can become difficult to control. They also harbour pests and diseases for many crop species. It will require several years to study the importance of these species. Similar surveys are being carried out in other states with similar irrigation uses so that a more complete picture of the weed spectrum can be developed. * N. Hill is now employed by Agriculture, WA.