There are multiple metric units to choose from! This tutorial goes through the process of choosing the best metric unit to use for measuring the mass of a given object.
The most common aphids on houseplants are the light green ones (pear aphids), but aphids can also be found colored pink, white, grey and black. Additionally, winged aphids can appear when colonies are established and fly to infect new plants. Juvenile aphids (nymphs) look like smaller versions of the adults.
Quick Answer. Ladybugs' bright red color exists to frighten predators away from eating them. Despite their name, ladybugs are actually beetles and are not members of the true bug family, which includes ladybugs' favorite food, aphids. In its lifetime, a ladybug can eat up to 5,000 aphids, plant lice or whiteflies.