What is the impact of winter grain crops on Pratylenchus thornei grown in rotation with tolerant and intolerant wheat?

Owen, K. J. and Clewett, T. G. and Thompson, J. P. (2012) What is the impact of winter grain crops on Pratylenchus thornei grown in rotation with tolerant and intolerant wheat? In: 7th Australasian Soilborne Diseases Symposium, 18-20 Sept 2012, Freemantle, WA, Australia.

Abstract

Management of the root-lesion nematode, Pratylenchus thornei (Pt), is central to wheat production in the northern grain region of Australia and relies on rotation with resistant crops and growing tolerant wheat cultivars. We determined the residual populations of Pt to 90 cm soil depth after winter grain crops and their impact on the growth of subsequently planted tolerant and intolerant wheat cultivars. A weed-free fallow and 5–6 cultivars each of faba bean, chickpea, barley and wheat were treatments on two areas of land, 1) 4,500 Pt/kg soil at 0–45 cm after 7 months fallow after wheat and 2) 2,100 Pt/kg soil at 0–45 cm following 14 months fallow after sorghum. Six months after harvest there were 10,000–22,700 Pt/kg soil 0–45 cm after most barley, faba bean and commercial wheat cultivars; 2,600–6,000 Pt/kg soil 0–45 cm after wheat cvv.
QT9050, GS50a, chickpea cv. PBA Hattrick and fallow. There was a negative, linear relationship between Pt (to 90 cm) and biomass of the intolerant wheat cv. Strzelecki (max. R2 = 0.70 P<0.001 at 0–45 cm). There was no impact of residual Pt on the tolerant wheat cv. EGA Wylie. The tolerance of cv. EGA Wylie was robust but breeding resistant barley, faba bean and wheat will improve management options.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Speech)
Refereed: Yes
Item Status: Live Archive
Additional Information: Abstract only published - #44.
Faculty / Department / School: No Faculty
Date Deposited: 05 Sep 2016 23:31
Last Modified: 30 Jun 2017 03:17
Fields of Research : 07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences
URI: http://eprints.usq.edu.au/id/eprint/29653

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