Aquatic insects (such as Mayflies, Caddisflies, Stoneflies) are generally the most conspicuous life forms in streams, ponds and lakes. Certain species can reach tremendous numbers. Many molt into winged adults and some become pests in and around nearby buildings. Chemical control of these pests at their source is generally not permissible because of environmental risks to their aquatic habitat.
Mayflies are also known as shadflies and lakeflies. Actually, they
are not "flies" at all, but are insects in the order Ephemeroptera. Their
eggs are deposited in water and the nymphs live at the bottom of streams, pools and lakes.
They feed on small aquatic plants, animals and organic materials. These
insects lead a very uncertain life, being the chief food of many aquatic insects and
For the control of Mayflies (and other aquatic pests), go to