Abstract
The effects of temperature on the development of Orius albidipennis (Reuter) (Hemiptera: Anthocoridae), reared on its prey, Megalurothrips sjostedti (Trybom) (Thysanoptera: Thripidae), were studied in the laboratory. Nymphal mortality was 87, 48 and 38 % at 20, 25 and 30 °C, respectively. With the exception of first-instar nymphs, percentage mortality was lowest at 25 °C. Pre-oviposition period and longevity decreased with an increase in temperature. Mean daily and total fecundity were 2.1 and 76.4 respectively at 25 °C. The mean developmental period from oviposition to adult eclosion was 27.7, 14.1 and 10.9 days at 20, 25 and 30 °C respectively. There was a linear relationship between temperature and developmental rate (1 /day) of O. albidipennis. Lower thermal thresholds were 13.8, 13.5, 12.7, 15.0, 13.8 and 12.5 °C for eggs and nymphal stages 1 to 5, respectively, with the corresponding average degree-day requirement of 46.9, 42.6, 33.3, 29.2, 26.1 and 51.4 days,, respectively. The implications of these results for biological control of thrips are discussed.
Résumé
Les effets de la température sur le développement d’Orius albidipennis (Reuter) (Hemiptera: Anthocoridae) élevé sur sa proie, Megalurothrips sjostedti (Trybom) (Thysanoptera: Thripidae), ont été étudiés au laboratoire. La mortalité des nymphes est respectivement de 87,48 et 38% à 20, 25 et 30 °C. A l’exception de la nymphe de 1er stade, la mortalité est plus faible à 25 °C. La durée de pré-oviposition et la longévité diminuent lorsque la température augmente. La fécondité moyenne journalière et totale sont respectivement de 2,1 et 76,4 à 25 °C. La durée moyenne de développement de l’oviposition à l’émergence de l’adulte est respectivement de 27,7, 14,1 et 10,9 jours à 20, 25 et 30 °C. Il existe une relation linéaire entre le température et le taux de développement (1/jour) d’Orius albidipennis. Les seuils thermiques de développement inférieurs sont respectivement de 13,8, 13,5, 12,7, 15,0, 13,8 et 12,5 °C pour l’oeuf et les stades nymphaux 1 à 5 avec respectivement un besoin moyen en degrés jours de 46,9,42,6,33,3,29,2,26,1 et 51,4 jours. On discute des conséquences de ces résultats sur la lutte biologique contre les thrips.
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Gitonga, L.M., Löhr, B., Overholt, W.A. et al. Effect of Temperature on the Development of Orius Albidipennis Reuter, a Predator of the African Legume Flower Thrips, Megalurothrips Sjostedti Trybom. Int J Trop Insect Sci 22, 215–220 (2002). https://doi.org/10.1017/S1742758400012078
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DOI: https://doi.org/10.1017/S1742758400012078