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biological control agent

Catalogue: Broadacre Field Crops DAFF QLD
" Print the page sitona weevil, Sitona discoideus, scalloped leaf damage Scalloped leaf damage... Larvae feed within or on the root nodules and can cause more serious damage than adults by reducing nitrogen fixation and retarding plant growth... Larvae feed through the winter and early spring to pupate in the soil and emerge as adults in late spring/early summer...
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Catalogue: Broadacre Field Crops DAFF QLD
" Print the page sitona weevil, Sitona discoideus, scalloped leaf damage Scalloped leaf damage... Larvae feed within or on the root nodules and can cause more serious damage than adults by reducing nitrogen fixation and retarding plant growth... Larvae feed through the winter and early spring to pupate in the soil and emerge as adults in late spring/early summer...
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Catalogue: Broadacre Field Crops DAFF QLD
" Print the page sitona weevil, Sitona discoideus, scalloped leaf damage Scalloped leaf damage... Larvae feed within or on the root nodules and can cause more serious damage than adults by reducing nitrogen fixation and retarding plant growth... Larvae feed through the winter and early spring to pupate in the soil and emerge as adults in late spring/early summer...
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Catalogue: Ground Cover
Political timidity and red tape are hampering Australia"s battle against the devastation being caused by invasive weeds, according to the CEO for the CRC for Australian Weed Management, Dr Rachel McFadyen ( left )... Dr McFadyen said Australia was a leader in the application of stringent testing requirements prior to the release of biological control agents, but this was not being reflected in current policies which had more than halved the number of agents now being released... Dr McFadyen said that weeds cost the livestock industry an estimated $1.8 billion a year in lost production, and the herbicide and mechanical control measures employed represented increasing economic, environmental and health costs, especially in sensitive areas such as national parks and riparian land...
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Catalogue: GRDC Final Reports
These included control of the causal organisms with the biological control agent the twist fungus ( Dilophospora alopecuri ), reduction of the contamination of harvested grain by Rathayibacter toxicus, the toxigenic bacteria that causes ARGT, and the collection of evidence that exotic non-toxigenic Rathayibacter spp ... With respect to the effectiveness of the twist fungus to reduce the risk of ARGT in livestock in WA and SA and reduce the levels of R.toxicus contamination of harvested grain, the project identified that this organism will take longer than the originally anticipated five years to start having an impact on the prevalence of the ARGT causal organisms... Further research is needed to determine if spray-topping of ryegrass pastures has an adverse effect on the establishment and persistence of the twist fungus...
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