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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  and
J.H. Borden
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
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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
Information
The Canadian Entomologist , Volume 123 , Issue 3 , June 1991 , pp. 595 - 600
Copyright
Copyright © Entomological Society of Canada 1991

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