Effects of Temperature on the Development, Natality, and Longevity of Rhopalosiphum nymphaeae (L.) (Homoptera: Aphididae)

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Abstract
Development, natality, and survivorship rates of the aphid Rhopalosiphum nymphaeae (L.) were measured at six constant temperatures with a photoperiod of 12:12 (L:D). The time required for development from first instar to adult ranged from 10.3 days at 18.3°C to 6.8 days at 30.6°C. No adults developed at 10 and 32.2°C. An additional instar was noted at 18.3°C. Longevity was highest at 10°C and lowest at 32.2°C. Natality rates ranged from 2.4 to 4.0 nymphs per aphid per day or 7.8–53.1 nymphs per female. Optimal tested temperatures for R. nymphaeae were 21.1 and 26.7°C.