In polymer chemistry, polymerization is a process of reacting monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks. There are many forms of polymerization and different systems exist to categorize them.
The thistle caterpillar is the larval stage of the painted lady butterfly. The adult insect migrates into Iowa each year from Texas and Mexico. Eggs are laid on both thistle and soybeans. The caterpillar is easily identified by the spines that resemble Christmas trees that have lost all their needles.
Note the plant the caterpillars are eating. Checking out the plant a caterpillar is eating generally is the easiest way to tell what kind of caterpillar youâre watching. Monarchs only lay their eggs on and eat milkweed, members of the Asclepias family. Swallowtails will host on members of the Apiaceae family, which includes parsley, Queen Anneâs Lace, carrot, celery, fennel and dill.