Effects of nitrogen and foliar biomass on population parameters of cabbage insects

R. K. Jansson, G. L. Leibee, C. A. Sanchez, S. H. Lecrone

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The effects of different nitrogen (N) fertilization rates (0, 45, 90, and 168 kg N/ha), plant nitrogen concentration, and plant biomass on abundance and population growth of diamondback moth, Plutella xylostella (L.), cabbage looper, Trichoplusia ni (Hübner), cabbage budworm, Hellula phidilealis (Walker), imported cabbageworm, Artogeia rapae (L.), and cross‐striped cabbageworm, Evergestis rimosalis (Guenée), were investigated in Homestead and Sanford, Florida in 1987. The effects of these factors on the parasitization of P. xylostella were also examined. In Homestead, abundance of most insect pests and parasitized P. xylostella increased with an increase in the level of N applied and with an increase in plant biomass. Similar results were found in Sanford, although results were not consistently significant. Abundance of most insect pests was significantly positively correlated with plant N concentration. Multiple regression analyses indicated that foliar biomass was significantly more important than N fertilization rate and subsequent plant N concentration at predicting abundance of insect pests and parasitized P. xylostella on cabbage. 1991 The Netherlands Entomological Society

Original languageEnglish (US)
Pages (from-to)7-16
Number of pages10
JournalEntomologia Experimentalis et Applicata
Volume61
Issue number1
DOIs
StatePublished - Oct 1991
Externally publishedYes

Keywords

  • Artogeia rapae
  • Hellula phidilealis
  • Plutella xylostella
  • Trichoplusia ni
  • cabbage
  • nitrogen
  • population growth

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Insect Science

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