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.
Identification of aphids. Aphids are small, soft-bodied insects that feed exclusively on plants. These small insects can be nearly colorless to green, yellow, pink and even black in color. They can form dense colonies on leaves and stems (right) sometimes completely obscuring the plant surface.o get enough of the protein that they need aphids must take in a lot more sugar (plant sap) than they can use -- excess sugar is expelled through the body as a concentrated sugar solution called honeydew. This honeydew may drip from the plant and attract sugar-loving insects like ants and wasps.