Measuring root disease suppression in response to a compost water extract

Gilberto Curlango-Rivera, Tom Pew, Hans D. Van Etten, Zhongguo Xiong, Naitong Yu, Martha C Hawes

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Commercial application of compost to prevent plant disease is hindered by variable performance. Here, we describe the use of a growth pouch assay to measure impact of a compost water extract (CWE) on root infection under controlled conditions. Most pea roots (≥95%) inoculated with Fusarium solani or Phoma pinodella spores rapidly develop a single local lesion in the region of elongation. In the presence of CWE, infection of pea roots grown in pouches was reduced by 93 to 100%. CWE used as a drench on pea seedlings grown in sand also resulted in 100% protection but, in a heavy clay soil, infection was reduced by <50%. CWE filtered to remove microorganisms did not inhibit frequency of F. solani infection, and resulted in increased local lesion development on individual roots. CWE inhibited mycelial growth of both pea- and cucumber-infecting isolates of F. solani in culture but exerted <40% protection against cucumber root infection. CWE treatment of pea but not cucumber was associated with retention of a sheath of border cells interspersed with bacteria covering the region of elongation. Growth pouch assays may provide a system to monitor effects of specific compost mixtures on root- rhizosphere interactions, and to identify variables influencing disease control.

Original languageEnglish (US)
Pages (from-to)255-260
Number of pages6
JournalPhytopathology
Volume103
Issue number3
DOIs
StatePublished - Mar 2013

Fingerprint

root diseases
composts
disease control
extracts
peas
Fusarium solani
pouches
water
cucumbers
lesions (plant)
infection
Phoma
assays
plant diseases and disorders
clay soils
rhizosphere
spores
sand
microorganisms
seedlings

ASJC Scopus subject areas

  • Plant Science
  • Agronomy and Crop Science

Cite this

Measuring root disease suppression in response to a compost water extract. / Curlango-Rivera, Gilberto; Pew, Tom; Van Etten, Hans D.; Xiong, Zhongguo; Yu, Naitong; Hawes, Martha C.

In: Phytopathology, Vol. 103, No. 3, 03.2013, p. 255-260.

Research output: Contribution to journalArticle

Curlango-Rivera, Gilberto ; Pew, Tom ; Van Etten, Hans D. ; Xiong, Zhongguo ; Yu, Naitong ; Hawes, Martha C. / Measuring root disease suppression in response to a compost water extract. In: Phytopathology. 2013 ; Vol. 103, No. 3. pp. 255-260.
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