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.
Aphids, also called plant lice, are small (up to Â¼ inch) soft - bodied insects that infest most garden plants. Some aphids spend their entire lives on one type of plant; others infest different varieties. Most gardeners can readily identify the green aphids, but black, brown, yellow and gray aphids are also common.