Effect of temperature on development,mortality, fecundity and reproduction of<Emphasis Type="Italic">Tuberolachnus salignus</Emphasis> on weeping willow (<Emphasis Type="Italic">Salix babylonica</Emphasis>) and corkscrew willow (<Emphasis Type="Italic">Salix matsudana</Emphasis>) |
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| Authors: | N Özder Ö Sa?lam A Güven V Ayd?n |
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| Institution: | (1) Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India |
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| Abstract: | The development time, survivorship and reproduction ofTuberolachnus salignus (Gmelin) (Hemiptera: Aphididae) Lachninae, Lachnini] were studied onSalix babylonica (weeping willow) andSalix matsudana (corkscrew willow) at five constant temperatures (17.5, 20, 22.5, 25 and 27.5°C). The development time of immature stages
ofT. salignus ranged from 14.56 days at 17.5°C to 12.50 days at 25°C onS. babylonica, and 16.47 days at 20°C to 12.28 days at 25°C onS. matsudana. The total survivorship of immature stages ofT. salignus varied from 28% to 85% at 22.5 and 17.5°C, respectively, onS. babylonica, and from 13% to 63%, respectively, at 17.5 and 25°C onS. matsudana. The greatest intrinsic rate of increase occurred at 25°C onS. babylonica (0.2691) and also onS. matsudana (0.2607). The mean generation time of the aphid population ranged from 14.15 days at 25°C to 16.24 days at 17.5°C onS. babylonica, and from 14.33°C days at 25°C to 19.86 days at 20°C onS. matsudana. The optimal temperature forS. babylonica growth, development time, reproduction and percent survival was 25°C. |
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