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nematode

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Catalogue: GRDC Updates (West)
x Make use of available testing services to determine nematode species and levels, but be aware that PreDicta-B cannot currently detect some of the nematodes present in WA crops... Crop Updates is a partnership between the Department of Agriculture, Western Australia and the Grains Research & Development Corporation 72.. Overall, lupin was resistant, but Mandelup and Belara resulted in a nematode multiplication rate > 1...
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Catalogue: GRDC Publications
Growers do not have access to varieties with resistance to the key exotic pests and disease... The project will proceed in two phases... The project is about optimizing pesticide sprayapplications by: identifying spray technologies and spray settings with low risk of spraydrift, applying pesticides in accordance with latest knowledge about pest behaviour in response to pesticides andtherefore minimizes the risk of target pests developing resistance, and by using pesticides with documented efficacyagainst target pests...
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Catalogue: GRDC Research Summaries
One or more species of RLN (Root Lesion Nematode, Pratylenchus spp.) occur in at least 60% of WA cropping paddocks... The principal outputs of this project will be knowledge of wheat varieties which are more resistant to RLN (i.e. limit the multiplication of RLN under a crop) & more tolerant to RLN (i.e. yield loss incurred in a variety due to RLN is minimised)... RLN research in WA will continue to focus on management, principally through rotational recommendations for the deployment of cereal cultivars (& other host crops) with a level of resistance to each RLN that will benefit subsequent crop yields...
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Catalogue: GRDC Research Summaries
A genetic map was constructed and several DNA regions were identified to be associated with resistance... Two highly significant DNA regions controlling a large percentage of the expressed resistance were targeted and several hundred molecular markers were added... Investigations into the biological mechanism of this resistance showed that nematodes can still penetrate resistant roots but are unable to feed and move within roots, which suppresses nematode development and reproduction (Egg laying and hatching)...
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Catalogue: GRDC Updates (West)
To date there have been four sites identified with resistant RLEM to frequently used synthetic pyrethroids such as bifenthrin... Cereals, oilseeds and pastures were assessed in separate experiments, each containing replicated check cultivars: P. neglectus susceptible Machete and Brookton wheats, and P. neglectus resistant Tanjil lupin and Kaspa field pea... The lotus, serradella and sulla assessed against medics and biserrula were S...
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Catalogue: GRDC Media
Tests will confirm species and population levels of these microscopic endoparasites and help the Department of Agriculture and Food WA (DAFWA) characterise distribution and gather resistance information for crops and varieties grown in WA... The research, jointly funded by GRDC and DAFWA, is vital because yield loss can occur without careful planning in crop variety selection and no chemicals are currently available to economically control RLN in broadacre cropping systems... Using resistant varieties of a crop to inhibit nematode reproduction...
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Catalogue: GRDC Media
Root lesion nematodes (RLN) are proving to be at high levels in Western Australian cropping paddocks this year and growers are encouraged to have samples tested to help them manage the pest in coming seasons... Surveys conducted by the Department of Agriculture and Food (DAFWA), with support from the Grains Research and Development Corporation (GRDC), showed that RLN caused widespread damage in every WA cropping zone last year... "RLN species were found in 90 per cent of 130 paddocks surveyed, and in 48 per cent of paddocks the nematode levels were high enough to cause 15 to 50 per cent yield loss," DAFWA researcher Sarah Collins said...
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Catalogue: GRDC Media
Root lesion nematodes (RLN) are proving to be at high levels in Western Australian cropping paddocks this year and growers are encouraged to have samples tested to help them manage the pest in coming seasons... Surveys conducted by the Department of Agriculture and Food (DAFWA), with support from the Grains Research and Development Corporation (GRDC), showed that RLN caused widespread damage in every WA cropping zone last year... "RLN species were found in 90 per cent of 130 paddocks surveyed, and in 48 per cent of paddocks the nematode levels were high enough to cause 15 to 50 per cent yield loss," DAFWA researcher Sarah Collins said...
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Catalogue: GRDC Research Summaries
There has been a considerable increase in the incidence of crops affected by root lesion nematode (RLN) throughout the Western Australian (WA) cropping region... The recent root disease survey showed that the highest levels of all root diseases in WA are in the southern high rainfall zone... The objectives of the project are to:1) Identify sites in WA that are suppressive to one or more root diseases of wheat including take-all, rhizoctonia root rot, crown rot and RLN. Sites will be selected from three past and current projects including the DAFWA "Profitable crop sequencing in WA" [P. WHITE, M. HARRIES] project (which will establish 150 focus sites at which inoculum level and disease incidence will be measured), the "Soil Quality" [D. MURPHY] project (which has previously established a large number of geo-referenced monitoring sites around the WA agricultural region and the inoculum level was measured), and the DAFWA 2006-2008 cereal root disease survey sites [DAW00159]...
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Catalogue: GRDC Media
Researchers get the dirt on nematodes.. Western Australian growers who suspect their crops are being damaged by root lesion nematodes (RLN) can confirm which species and population levels are present in problem areas by using in-season testing services this growing season... Research being conducted by the Department of Agriculture and Food (DAFWA), supported by the Grains Research and Development Corporation (GRDC), aims to characterise differences between crop varieties in their resistance and tolerance to each species, which would allow growers to select appropriate cultivars to minimise yield losses...
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