Abstract
To explore the possibility of usingOrius tantillus (Motschulsky) as a control agent againstThrips palmi Karny in greenhouses in Japan during the winter months, the effects of temperature on the development of eggs and nymphs of this predator were determined by rearing individuals under eight constant temperatures ranging from 17.5–35.0°C. Estimates of lower developmental threshold temperatures for eggs, male nymphs and female nymphs were 13.7°C, 11.9°C and 13.4°C, respectively. These estimates were lower than the average winter temperature at night in greenhouses in Japan, suggesting thatO. tantillus could possibly be used for the control ofT. palmi in such greenhouses. Thermal constants were estimated at 52.6, 185.2 and 153.8 degree days for eggs, male nymphs and female nymphs, respectively. Egg survival at temperatures between 20°C and 30°C was higher (p=0.05) than at 17.5°C.
Résumé
Dans le but d’explorer la possibilité d’utiliserOrius tantillus (Motschulsky) comme agent de lutte biologique contreThrips palmi Karny en serres au Japon pendant les mois d’hiver, les effets de la température sur le développement des œufs et des larves de ce prédateur ont été étudiés à 8 températures constantes, allant de 17,5°C à 35°C. Les températures-seuil de développement pour les œufs, les larves mâles et les larves femelles étaient respectivement de 13,7°C, 11,9°C et 13,4°C. Ces estimations étaient plus faibles que la température moyenne nocturne sous serre au Japon pendant l’hiver, ce qui suggère queO. tantillus pourrait probablement être utilisé en lutte biologique contreT. palmi dans ces serres. Les constantes thermiques ont été évaluées à 52,6, 185,2 et 153,8 degrésjours respectivement, pour les œufs, les larves mâles et les larves femelles. La survie de l’œuf à des températures comprises entre 20°C et 30°C était plus élevée (p=0,05) qu’à 17,5°C.
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Nakashima, Y., Hirose, Y. Temperature effects on development ofOrius tantillus (Het.: Anthocoridae), A predator ofThrips palmi (Thys.: Thripidae). BioControl 42, 337–342 (1997). https://doi.org/10.1007/BF02769826
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DOI: https://doi.org/10.1007/BF02769826