Login | Create Account (DAF staff only)

Pre-cropping with canola decreased Pratylenchus thornei populations, arbuscular mycorrhizal fungi, and yield of wheat.

Owen, K.J. and Clewett, T.G. and Thompson, J.P. (2010) Pre-cropping with canola decreased Pratylenchus thornei populations, arbuscular mycorrhizal fungi, and yield of wheat. Crop & Pasture Science, 61 (5). pp. 399-400.

Full text not currently attached. Access may be available via the Publisher's website or OpenAccess link.

Article Link(s): http://dx.doi.org/10.1071/cp09345

Publisher URL: http://www.publish.csiro.au

Abstract

Root-lesion nematode (Pratylenchus thornei) significantly reduces wheat yields in the northern Australian grain region. Canola is thought to have a 'biofumigation' potential to control nematodes; therefore, a field experiment was designed to compare canola with other winter crops or clean-fallow for reducing P. thornei population densities and improving growth of P. thornei-intolerant wheat (cv. Batavia) in the following year. Immediately after harvest of the first-year crops, populations of P. thornei were lowest following various canola cultivars or clean-fallow (1957-5200 P. thornei/kg dry soil) and were highest following susceptible wheat cultivars (31 033-41 294/kg dry soil). Unexpectedly, at planting of the second-year wheat crop, nematode populations were at more uniform lower levels (<5000/kg dry soil), irrespective of the previous season's treatment, and remained that way during the growing season, which was quite dry. Growth and grain yield of the second-year wheat crop were poorest on plots previously planted with canola or left fallow due to poor colonisation with arbuscular mycorrhizal (AM) fungi, with the exception of canola cv. Karoo, which had high AM fungal colonisation and low wheat yields. There were significant regressions between growth and yield parameters of the second-year wheat and levels of AMF following the pre-crop treatments. Thus, canola appears to be a good crop for reducing P. thornei populations, but AM fungal-dependence of subsequent crops should be considered, particularly in the northern Australian grain region.

Item Type:Article
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science
Business groups:Agri-Science, Crop and Food Science
Additional Information:© The State of Queensland (Department of Employment, Economic Development and Innovation). © CSIRO Publishing.
Keywords:Brassicas; long fallow disorder; Merlinius brevidens; biofumigation; nematodes.
Subjects:Plant pests and diseases > Pest control and treatment of diseases. Plant protection
Plant pests and diseases > Individual or types of plants or trees > Wheat
Plant culture > Field crops > Other field crops
Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Deposited On:08 Sep 2010 06:04
Last Modified:25 Oct 2011 23:23

Repository Staff Only: item control page