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Life history of Lygus keltoni (Hemiptera: Miridae) in the laboratory1

Published online by Cambridge University Press:  02 April 2012

H.A. Cárcamo ,
T.R. Larson ,
C.E. Herle  and
J.K. Otani
H.A. Cárcamo*
Affiliation:
Agriculture and Agri-Food Canada, Lethbridge Research Centre, 5403 1st Avenue South, P.O. Box 3000, Lethbridge, Alberta, Canada T1J 4B1
T.R. Larson
Affiliation:
Agriculture and Agri-Food Canada, Lethbridge Research Centre, 5403 1st Avenue South, P.O. Box 3000, Lethbridge, Alberta, Canada T1J 4B1
C.E. Herle
Affiliation:
Agriculture and Agri-Food Canada, Lethbridge Research Centre, 5403 1st Avenue South, P.O. Box 3000, Lethbridge, Alberta, Canada T1J 4B1
J.K. Otani
Affiliation:
Agriculture and Agri-Food Canada, Beaverlodge Research Farm, P.O. Box 29, Beaverlodge, Alberta, Canada T0H 0C0
*
2Corresponding author (e-mail: [email protected]).
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Abstract

Lygus keltoni Schwartz and Foottit is a species of plant bugs recently recognized as distinct from L. shulli Knight and an important component of the pest complex that attacks a number of field crops such as canola (Brassica napus) and alfalfa (Medicago sativa) in western Canada. The current laboratory study was undertaken to determine basic life-history parameters, such as instar duration, adult longevity, and reproductive potential, required to develop biologically based pest management strategies. At 25–27 °C, males lived around 34 days and females lived around 48 days. Females produced an average of 133 nymphs but up to 306 nymphs during their reproductive life, which averaged around 4 weeks (7-day preoviposition period). Egg incubation lasted around 10 days, instars 1–4 lasted 2–3 days each, and the 5th instar lasted 4 days. The reproductive potential of L. keltoni seems to be lower than that of L. hesperus Knight and L. lineolaris (Palisot de Beauvois), but other life-history parameters of the adults and development times of the nymphs are comparable.

Résumé

Lygus keltoni Schwartz and Foottit est une espèce de punaise ravageur des plantes de l'ouest canadien (canola, Brassica napus; luzerne, Medicago sativa) récemment séparée de L. shulli Knight par les taxonomistes. Nous avons fait une étude dans le laboratoire pour déterminer les aspects de base de son cycle de vie tels que sa longévité, son potentiel reproducteur et la durée des stades nymphales. Ces renseignements sont requis pour développer des méthodes de lutte intégrée. Les mâles et femelles élevés à une température de 25–27 °C vécûrent en moyenne 34 et 48 jours, respectivement. La progéniture moyenne fut de 133 nymphes mais le maximum fut de 306 pendant leur période de reproduction de 4 semaines (7 jours de période pré-ponte). L'incubation des oeufs dura 10 jours, les nymphes des stades 1–4 ont duré entre 2 et 3 jours mais la cinquième stade dura 4 jours. Le potentiel de reproduction de L. keltoni semble être inférieur à ceux de L. hesperus Knight et L. lineolaris (Palisot de Beauvois) mais les autres paramètres biologiques sont comparables.

Type
Articles
Information
The Canadian Entomologist , Volume 138 , Issue 6 , December 2006 , pp. 871 - 874
Copyright
Copyright © Entomological Society of Canada 2006

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Footnotes

1

Contribution No. (387) 05074 of Agriculture and Agri-Food Canada, Lethbridge Research Centre.

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