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.
The buck moth caterpillar resembles the io moth caterpillar but is purple-black with a reddish head and lacks the body stripes. The saddleback caterpillar is an unusual looking caterpillar with a brown body marked with a bright green area resembling saddle blanket with an oval purplish-brown spot in its center.dults have siphoning mouths. Caterpillars feed on leaves of many shrubs and bushes, such as hollies. Adults moths can be collected at lights. Pest Status: The caterpillar is called an asp by Texans, although there are other caterpillars that also produce a painful skin rash from contact with venom containing spines.