Arthropod abundance and diversity in Bt and non-Bt cotton fields

Mark S. Sisterson, Robert W. Biggs, Carl Olson, Yves Carriere, Timothy J. Dennehy, Bruce E Tabashnik

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

The widespread planting of crops genetically modified to produce Bacillus thuringeinsis Berliner (Bt) toxins for pest control may affect nontarget arthropods. To address this issue, we compared the abundance and diversity of arthropods on plants in field plots of Bt cotton, non-Bt cotton, and a row mixture of 75% Bt cotton and 25% non-Bt cotton at two sites in Arizona. Over three sampling dates during 2 yr, we recorded all of the arthropods found on 120 cotton plants per treatment. This yielded 3,309 individual arthropods from 69 families. Excluding pink bollworm, Pectinophora gossypiella Saunders, the pest targeted by Bt cotton, we compared the abundance and diversity of all arthropods, chewing herbivores, sucking herbivores, rasping-sucking arthropods, and natural enemies. Arthropod abundance was significantly affected by site, plant height, and cotton type. More arthropods were collected from row mixture plots than Bt plots, but arthropod abundance did not differ significantly between Bt plots and non-Bt plots. The number of families collected was 57 for row mixture plots, 55 for non-Bt plots, and 47 for Bt plots. The number of families increased as arthropod abundance increased, suggesting that the differences in diversity among treatments were caused by differences in abundance. Within row mixture plots, arthropod abundance and diversity did not differ significantly between Bt plants and non-Bt plants. We conclude that the differences between Bt and non-Bt cultivars had relatively minor effects on the arthropod community on cotton plants.

Original languageEnglish (US)
Pages (from-to)921-929
Number of pages9
JournalEnvironmental Entomology
Volume33
Issue number4
StatePublished - 2004

Fingerprint

arthropod
arthropods
cotton
Pectinophora gossypiella
herbivores
herbivore
arthropod communities
mastication
pest control
natural enemy
natural enemies
toxin
toxins
cultivar
planting
pests
crop
cultivars
crops

Keywords

  • Bacillus thuringiensis
  • Bt cotton
  • Nontarget
  • Pink bollworm

ASJC Scopus subject areas

  • Insect Science
  • Environmental Science(all)

Cite this

Sisterson, M. S., Biggs, R. W., Olson, C., Carriere, Y., Dennehy, T. J., & Tabashnik, B. E. (2004). Arthropod abundance and diversity in Bt and non-Bt cotton fields. Environmental Entomology, 33(4), 921-929.

Arthropod abundance and diversity in Bt and non-Bt cotton fields. / Sisterson, Mark S.; Biggs, Robert W.; Olson, Carl; Carriere, Yves; Dennehy, Timothy J.; Tabashnik, Bruce E.

In: Environmental Entomology, Vol. 33, No. 4, 2004, p. 921-929.

Research output: Contribution to journalArticle

Sisterson, MS, Biggs, RW, Olson, C, Carriere, Y, Dennehy, TJ & Tabashnik, BE 2004, 'Arthropod abundance and diversity in Bt and non-Bt cotton fields', Environmental Entomology, vol. 33, no. 4, pp. 921-929.
Sisterson, Mark S. ; Biggs, Robert W. ; Olson, Carl ; Carriere, Yves ; Dennehy, Timothy J. ; Tabashnik, Bruce E. / Arthropod abundance and diversity in Bt and non-Bt cotton fields. In: Environmental Entomology. 2004 ; Vol. 33, No. 4. pp. 921-929.
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