Groups of 10 Acyrthosiphon pisum (Harris), adults were exposed to each of the following temperatures for 24 hours: 5, 10, 15, 20, 25, 30, and 35°C. Ten parameters of probing behavior were analyzed for the 10 groups at each temperature. Results showed that certain probing activities were significantly affected by temperature. Aphids exposed to the 2 temperature extremes (5 and 35°C) ingested fluid from sieve element cells less frequently than aphids exposed to the other temperatures. It was concluded that some temperature between 25 and 30°C was probably environmentally optimal for the pea aphid. Aphids at these temperatures ingested fluid from sieve elements for longer periods, probed for longer times, and produced more offspring than aphids at the other 5 temperatures.
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McLean et al. (1968) studied this question.