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FECUNDITY AND DEVELOPMENT OF THE MULLEIN BUG, CAMPYLOMMA VERBASCI (MEYER) (HETEROPTERA: MIRIDAE)

Published online by Cambridge University Press:  31 May 2012

R.F. Smith
Affiliation:
Agriculture Canada Research Station, Kentville, Nova Scotia, Canada B4N 1J5
J.H. Borden
Affiliation:
Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6

Abstract

The mullein bug, Campylomma verbasci (Meyer), was successfully established on eggplant cv. “Black Beauty” using the twospotted spider mite, Tetranychus urticae Koch, as a source of prey for early instars. Colony-raised teneral females lived 17.4±0.8 days (mean±SE) at 25°C, and their progeny averaged 6.7±0.6 nymphs per 48-h oviposition period (range 0–36). Fecundity peaked during days 6–10 and declined steadily beyond day 16. Over their lifespans, females produced eggs that hatched into 37.5±8.2 nymphs (range 2–184). Eggs from a 24-h oviposition period required from 7.2±0.1 days at 27°C to 13.0±0.2 days at 20°C for 100% hatch. An estimated developmental threshold of 9.5°C (r2 = 0.50) was obtained using the equation: rate of development = −0.075 + 0.008 (temperature). The frequency distribution of hatch at each of four constant temperatures was unimodal and approximated a normal distribution. Nymphal development at 22°C required 2.8±0.2, 3.8±0.2, 4.0±0.3, 3.9±0.2, and 6.0±0.3 days for instars 1–5, respectively.

Résumé

Nous avons réussi d’établir la punaise de la molène, Campylomma verbasci (Meyer) sur l’aubergine cv. «Black Beauty» en utilisant le tétranyque à deux points, Tetranychus urticae Koch, comme source de proie des jeunes stades. Les femelles ténérales élevées en colonie ont vécu pendant 17,4±0,8 jours (moyenne ± erreur type) à 25°C, et elles avaient une progéniture moyenne de 6,7±0,6 nymphes par période de ponte de 48 h (écart de 0 à 36). La fécondité a atteint le point d’apogée entre 6 à 10 jours et a diminué d’un rythme soutenu au delà du 16e jour. Les femelles ont produit des oeufs qui se sont éclos en donnant 37,5±8,2 nymphes en moyenne (écart de 2 à 184). Les oeufs produits pendant une période de ponte de 24 h avaient besoin de 7,2±0,1 jours à une température de 27°C jusqu’à 13,0±0,2 jours à une température de 20°C pour effectuer une éclosion de 100%. Un niveau de développement de 9,5°C (r2 = 0.50) a été défini en utilisant l’équation : taux de développement = −0,075 + 0,008 (température). La fréquence de distribution pour l’éclosion dans le cas de chacune de quatre températures constantes a été unimodale et a rapproché à une distribution normale. Le développement nymphal à 22°C a pris 2,8±0,2, 3,8±0,2, 4,0±0,3, 3,9±0,2 et 6,0±0,3 jours pour les stades 1 à 5, respectivement.

[Traduit par la rédaction]

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1991

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