Anaerobic Soil Disinfestation Efficacy Against Fusarium oxysporum Is Affected by Soil Temperature, Amendment Type, Rate, and C:N Ratio

被引：23

作者：

Shrestha, Utsala ^{[1
]}

Ownley, Bonnie H. ^{[2
]}

Bruce, Alex ^{[2
]}

Rosskopf, Erin N. ^{[3
]}

Butler, David M. ^{[1
]}

机构：

[1] Univ Tennessee, Dept Plant Sci, Knoxville, TN 37996 USA

[2] Univ Tennessee, Dept Entomol & Plant Pathol, Knoxville, TN 37901 USA

[3] USDA ARS, US Hort Res Lab, Ft Pierce, FL USA

来源：

PHYTOPATHOLOGY | 2021年 / 111卷 / 08期

基金：

美国食品与农业研究所;

关键词：

biological control; biological/reductive soil disinfestation; disease control and pest management; F. oxysporum f. sp. lycopersici; fumigant alternatives; fungal pathogens; meta-analysis; organic amendments; SOILBORNE PLANT-PATHOGENS; F-SP LYCOPERSICI; MICROBIAL COMMUNITY; ORGANIC-ACIDS; INOCULUM DENSITY; METHYL-BROMIDE; CARBON SOURCE; METAANALYSIS; SUPPRESSION; STRAWBERRY;

D O I：

10.1094/PHYTO-07-20-0276-R

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

A meta-analysis of anaerobic soil disinfestation (ASD) efficacy against Fusarium oxysporum and F. oxysporum f. sp. lycopersici was conducted emphasizing effects of environment and organic amendment characteristics and pot and field studies conducted on ASD amendment C:N ratio and soil temperature effects on F. oxysporum f. sp. lycopersici inoculum survival. In a pot study, two organic amendments, dry molasses-based or wheat bran-based, applied at 4 mg of C/g of soil, with 40:1, 30:1, 20:1, and 10:1 C:N ratios, were evaluated against F. oxysporum f. sp. lycopersici at 15 to 25 degrees C. This study was followed by a pot study with temperature regimes of 15 to 25 degrees C and 25 to 35 degrees C and two C:N ratios (20:1 and 40:1), and a field study at 40:1, 30:1, 20:1, and 10:1 C:N ratios, a 30:1 C:N ratio at a lower C rate (2 mg of C/g of soil), and an anaerobic control. Soil temperature >25 degrees C and more labile amendments increased ASD suppression of F. oxysporum/F. oxysporum f. sp. lycopersici in the meta-analysis. In pot studies, F. oxysporum f. sp. lycopersici survival was reduced for molasses-based mixtures at 20:1 and 30:1 C:N ratios compared with wheat bran-based mixtures but not compared with the anaerobic control. At 25 to 35 degrees C, all ASD treatments suppressed F. oxysporum f. sp. lycopersici relative to controls. In the field, all ASD treatments reduced F. oxysporum f. sp. lycopersici survival compared with the anaerobic control, and 4 mg of C/g of soil amendment rates induced higher anaerobic conditions and higher F. oxysporum f. sp. lycopersici mortality compared with the 2 mg of C/g of soil rate. Although amendment C:N ratios from 10 to 40:1 were similarly suppressive of F. oxysporum, lower temperatures reduced ASD effectiveness against F. orysporum/F. oxysporum f. sp. lycopersici and further work is warranted to enhance suppression at soil temperatures <25 degrees C.

引用

页码：1380 / 1392

页数：13

共 43 条

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