Investigating the Impact of Root-Lesion Nematodes (Pratylenchus thornei) and Crown Rot (Fusarium pseudograminearum) on Diverse Cereal Cultivars in a Conservation Farming System
| Autor: | John P. Thompson, T. G. Clewett |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Fusarium Pratylenchus thornei Population Fumigation root-lesion nematode Biology 01 natural sciences Crop Anthesis wheat durum Fusarium pseudograminearum Cultivar education education.field_of_study food and beverages barley soil fumigation Agriculture 04 agricultural and veterinary sciences Crop rotation biology.organism_classification Agronomy crown rot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries DNA based diagnosis Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Agronomy Volume 11 Issue 5 Agronomy, Vol 11, Iss 867, p 867 (2021) |
| ISSN: | 2073-4395 |
| DOI: | 10.3390/agronomy11050867 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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