Abstract

Aphids are very troublesome for farmers. However, pesticides often have an unexpected influence. In the first series of experiments, the team tested aphid's responses to odours and colours. They found crushed orange peel to be the most effective repellent and yellow to be the best attractive color. From this, they designed a simple method of keeping aphids away from plants. This team also noticed variation in larval body colors of a descent of aphids. In their second series of experiments, they discovered that this resulted in an asexually reproducing, winged adult and that larval nourishment requirements, survival rates, and ability to withstand fasting of this variation were different to other individuals of the same descent. They concluded that this adaptation had come about to enable the descent to survive even if the hosting plant is killed.

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