Crop rotation for the management of root-lesion nematodes in the northern grain region of Australia

Owen, K. and Clewett, T. and Thompson, J. (2008) Crop rotation for the management of root-lesion nematodes in the northern grain region of Australia. In: 5th International Congress of Nematology (5ICN 2008): Nematodes Down Under, 13-18 Jul 2008, Brisbane, Australia.

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Root-lesion nematodes, Pratylenchus thornei and P. neglectus are widely distributed in the northern grain region of Australia which encompasses inland northern NSW and south-east Queensland. This sub-tropical region has a summer dominant rainfall and fertile clay soils. A broad range of both summer and winter crop species are grown and it is notable for its production of Australian Prime Hard wheat (high protein milling wheat) and grain sorghum
for stock feed.
P. thornei is the most commonly found root-lesion nematode in this region and poses a significant economic threat to susceptible crops, such as wheat and chickpea. For example,
intolerant wheat varieties can suffer yield losses as high as 70%. Marked differences are observed in the virulence of P. thornei and P. neglectus not only for crop species but also between crop varieties. For example, wheat cv. EGA Burke has a moderate level of resistance to P. thornei but is susceptible to P. neglectus; grain sorghum is susceptible to P.neglectus but resistant to P. thornei; mungbeans are susceptible to P. thornei, but resistant to
P. neglectus. We have identified the resistance/ susceptibility of common crops grown in this region to P. thornei and P. neglectus in both glasshouse and field experiments. This information is complemented by work on tolerance/intolerance of susceptible crop species of
wheat and chickpea. So, the management of root-lesion nematodes depends firstly on correct identification to
species level, then tailoring crop rotation plans so that resistant crops and tolerant cultivars are dominant in the farming system. When this is combined with farm hygiene to limit the spread of nematodes between paddocks and on farm machinery, the production of valuable, but susceptible crops, such as wheat, can be optimised and root-lesion nematode populations will remain at low, manageable levels.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 18 Jun 2014 05:28
Last Modified: 15 May 2017 06:02
Uncontrolled Keywords: nematodes; Darling Downs; soils; controls
Fields of Research : 06 Biological Sciences > 0603 Evolutionary Biology > 060307 Host-Parasite Interactions
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
06 Biological Sciences > 0607 Plant Biology > 060703 Plant Developmental and Reproductive Biology
Socio-Economic Objective: B Economic Development > 82 Plant Production and Plant Primary Products > 8205 Winter Grains and Oilseeds > 820507 Wheat

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