Effects of production practices on soil-borne entomopathogens in Western North Carolina vegetable systems

Robert L. Hummel, James F. Walgenbach, Mary Ellen Barbercheck, George G. Kennedy, Greg D. Hoyt, Consuelo Arellano

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

Populations of endemic soil entomopathogens (nematodes and fungi) were monitored in vegetable production systems incorporating varying degrees of sustainable practices in Fletcher, NC. Two tillage types (conventional plow and disk versus conservation tillage), two input approaches (chemically versus biologically based), and two cropping schedules (continuous tomato versus 3-yr rotation of corn, cucumber, cabbage, and tomato) were employed in large plots from 1995 to 1998. A Galleria mellonella (L.) trap bioassay was used to identify and monitor activity of Steinernema carpocapsae, Heterorhabditis bacteriophora, Beauveria bassiana, and Metarhizium anisopliae populations during the vegetable growing season (April-September). Seasonal detection of entomopathogens was significantly higher in conservation compared with conventional tillage systems. The strip-till operation did not affect levels of detection of S. carpocapsae. Pesticide use significantly reduced detection of entomopathogenic fungi. Type of ground cover significantly affected temperature in the upper 12 cm of soil; highest soil temperatures were observed under black plastic mulch and bare ground, whereas lowest temperatures were observed under rye mulch and clover intercrop. The high soil temperatures associated with certain ground covers may have reduced entomopathogen detection or survival. Although type of tillage appeared to be the primary factor affecting survival of endemic soil entomopathogens in our system, other factors, such as pesticide use and type of ground cover, can negate the positive effects of strip-tillage.

Original languageEnglish (US)
Pages (from-to)84-91
Number of pages8
JournalEnvironmental Entomology
Volume31
Issue number1
DOIs
StatePublished - Jan 1 2002

Fingerprint

entomopathogens
vegetable
tillage
ground cover
vegetables
strip tillage
Steinernema carpocapsae
vegetable growing
mulch
soil temperature
soil
pesticides
pesticide
fungus
tomatoes
Heterorhabditis bacteriophora
conservation tillage
Galleria mellonella
Metarhizium anisopliae
Beauveria bassiana

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Insect Science

Cite this

Hummel, Robert L. ; Walgenbach, James F. ; Barbercheck, Mary Ellen ; Kennedy, George G. ; Hoyt, Greg D. ; Arellano, Consuelo. / Effects of production practices on soil-borne entomopathogens in Western North Carolina vegetable systems. In: Environmental Entomology. 2002 ; Vol. 31, No. 1. pp. 84-91.
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Effects of production practices on soil-borne entomopathogens in Western North Carolina vegetable systems. / Hummel, Robert L.; Walgenbach, James F.; Barbercheck, Mary Ellen; Kennedy, George G.; Hoyt, Greg D.; Arellano, Consuelo.

In: Environmental Entomology, Vol. 31, No. 1, 01.01.2002, p. 84-91.

Research output: Contribution to journalArticle

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