In the summer, when food is abundant, pea aphids can rely on parthenogenesis, allowing their population to explode under favorable conditions.

在夏季食物充足的时候，豌豆蚜可以孤雌生殖，让种群数量在有利环境中迅速膨胀。

Dr Guerrieri worked with broad-bean plants, pea aphids and wasps called Aphidius ervi, which lay their eggs in aphids (see picture).

Guerrieri 博士研究了蚕豆植物、豌豆蚜虫和称为 Aphidius ervi 的黄蜂，它们在蚜虫中产卵（见图）。