Abstract
ABSTRACT The Fusarium spp. causing Fusarium crown and root rot (FCRR) are ubiquitous and abundant in soils, but in contrast, disease expression is localized and sporadic. Previous studies have related FCRR infection to phenolic acids released by asparagus, to the repression of Mn-reducers in soil, and to various soil physicochemical conditions. Fifty commercial asparagus plantations were surveyed using an exploratory approach in order to pinpoint the ecological conditions associated with FCRR development. Twenty-eight variables were used to describe the soil environments of the asparagus crops as well as the influence of crop management practices used locally. The data set was analyzed both as a whole and parsed by main cultivars (Jersey Giant and Guelph Millenium). Both field conditions and percentage of field area affected by FCRR varied widely between asparagus plantations. Planting depth was positively correlated with percentage of field area affected by FCRR and, hence, deep planting may favor FCRR infection. Plantation age was positively correlated with percentage of field area affected by FCRR, while soil available Mn was inversely correlated. Most importantly, soil Mn availability decreased with increasing plantation age, supporting the hypothesis of an asparagusmediated negative impact on Mn-reducing bacteria and of the involvement of reduced Mn availability in FCRR development. Improving the availability of Mn could provide a solution to the problem of FCRR in asparagus plantations.
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Claims 5
Claim · model-written summary
Field conditions and the percentage of area affected by FCRR varied widely among plantations.
- Outcome
- percentage of field area affected by FCRRe0
Asparagus
FusariumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both field conditions and percentage of field area affected by FCRR varied widely between asparagus plantations.”
e1“The Fusarium spp. causing Fusarium crown and root rot (FCRR)”
Claim · model-written summary
Planting depth was positively correlated with area affected by FCRR.
- Treatment
- Planting depthe0
- Outcome
- percentage of field area affected by FCRRe0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Planting depth was positively correlated with percentage of field area affected by FCRR”
e1“FCRR in asparagus plantations”
e2“The Fusarium spp. causing Fusarium crown and root rot (FCRR)”
Claim · model-written summary
Plantation age was positively correlated with area affected by FCRR.
- Outcome
- percentage of field area affected by FCRRe0
- Direction
- positively correlatede0
- Setting
- Plantation agee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plantation age was positively correlated with percentage of field area affected by FCRR”
e1“between asparagus plantations”
e2“The Fusarium spp. causing Fusarium crown and root rot (FCRR)”
Claim · model-written summary
Soil Mn availability decreased as plantation age increased.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil Mn availability decreased with increasing plantation age”
e1“between asparagus plantations”
Claim · model-written summary
The authors suggest improving Mn availability as a solution to asparagus FCRR.
- Outcome
- Improving the availability of Mne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Improving the availability of Mn could provide a solution to the problem of FCRR in asparagus plantations.”
e1“The Fusarium spp. causing Fusarium crown and root rot (FCRR)”