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Suppressiveness or conduciveness to Fusarium wilt of bananas differs between key Australian soils

Bowen, A., Orr, R., McBeath, A. V., Pattison, A. and Nelson, P. N. (2019) Suppressiveness or conduciveness to Fusarium wilt of bananas differs between key Australian soils. Soil Research, 57 (2). pp. 158-165.

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Article Link(s): https://doi.org/10.1071/SR18159

Publisher URL: https://www.publish.csiro.au/paper/SR18159

Abstract

Soils are known to differ in suppressiveness to soil-borne diseases, but the suppressiveness or otherwise to Fusarium wilt of Australian soils used to grow bananas is unknown. In this work we tested the relative suppressiveness of six key soil types. Banana (Musa (AAB group) ‘Pome’, cultivar ‘Lady Finger’) was grown in pots of the soils inoculated or not with Fusarium oxysporum f.sp. cubense (Foc) ‘Race 1’. Sixteen weeks after inoculation the plants were harvested and disease severity was assessed by measuring discoloration within the rhizome. In the inoculated pots, disease severity was greatest in the alluvial Liverpool and Virgil soils and least in the basaltic origin Tolga soil. No disease was detected in the non-inoculated pots. Soils with the lowest disease severity had the highest root mass, irrespective of inoculation, and the largest (negative) effect of inoculation on root dry mass. Disease severity in inoculated pots was negatively correlated with soil clay content and β-glucosidase activity. The results indicate that the risk of Fusarium wilt negatively impacting banana growth differs between soils of the main Australian banana-growing region.

Item Type:Article
Business groups:Horticulture and Forestry Science
Keywords:clay, crop disease, microbial diversity, soil fungi, tropical soils.
Subjects:Agriculture > Agriculture (General) > Soils. Soil science > Soil and crops. Soil-plant relationships. Soil productivity
Plant culture > Fruit and fruit culture > Culture of individual fruits or types of fruit > Bananas
Plant pests and diseases > Individual or types of plants or trees > Bananas
Deposited On:06 Mar 2019 23:10
Last Modified:06 Mar 2019 23:10

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