Investigating the impact of root-lesion nematodes (Pratylenchus thornei) and crown rot (Fusarium pseudograminearum) on diverse cereal cultivars in a conservation farming system
Article
Article Title | Investigating the impact of root-lesion nematodes (Pratylenchus thornei) and crown rot (Fusarium pseudograminearum) on diverse cereal cultivars in a conservation farming system |
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ERA Journal ID | 200126 |
Article Category | Article |
Authors | Thompson, John P. (Author) and Clewett, Timothy G. |
Journal Title | Agronomy |
Journal Citation | 11 (5), pp. 1-28 |
Article Number | 867 |
Number of Pages | 28 |
Year | 2021 |
Publisher | MDPI AG |
Place of Publication | Switzerland |
ISSN | 2073-4395 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/agronomy11050867 |
Web Address (URL) | https://www.mdpi.com/2073-4395/11/5/867 |
Abstract | In two experiments on a farm practicing conservation agriculture, the grain yield of a range of wheat cultivars was significantly (p < 0.001) negatively related to the post-harvest population densities of Pratylenchus thornei in the soil profile to 45 cm depth. In a third and fourth experiment with different rotations, methyl bromide fumigation significantly (p < 0.05) decreased (a) a low initial population density of P. thornei in the soil profile to 90 cm depth and (b) a high initial population of P. thornei to 45 cm depth, and a medium level of the crown rot fungus, Fusarium pseudograminearum, at 0–15 cm depth to a low level. For a range of wheat and durum cultivars, grain yield and response to fumigation were highly significantly (p < 0.001) related to (a) the P. thornei tolerance index of the cultivars in the third experiment, and (b) to both the P. thornei tolerance index and the crown rot resistance index in the fourth experiment. In the latter, grain yield was significantly (p < 0.001) positively related to biomass at anthesis and negatively related to percentage whiteheads at grain fill growth stage. One barley cultivar was more tolerant to both diseases than the wheat and durum cultivars. Crop rotation, utilizing crop cultivars resistant and tolerant to both P. thornei and F. pseudograminearum, is key to success for conservation farming in this region. |
Keywords | root-lesion nematode; Pratylenchus thornei; crown rot; Fusarium pseudograminearum; wheat; durum; barley; soil fumigation; DNA based diagnosis |
ANZSRC Field of Research 2020 | 300403. Agronomy |
300409. Crop and pasture protection (incl. pests, diseases and weeds) | |
Byline Affiliations | Centre for Crop Health |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6770/investigating-the-impact-of-root-lesion-nematodes-pratylenchus-thornei-and-crown-rot-fusarium-pseudograminearum-on-diverse-cereal-cultivars-in-a-conservation-farming-system
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Thompson and Clewett 2021 P. thornei and crown rot.pdf | ||
License: CC BY 4.0 | ||
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