Kangas joined Nightly Business Report in 1979; in 2003, his Stocks in the News segment earned a Financial Writers and Editors Award from the Medill School of Journalism at Northwestern University. In 2005, he won a Suncoast Chapter Silver Circle Award.
What Is a Malpighian Tubule? Malpighian tubules are organs within insects that excrete solid waste. Larvae of certain species of beetles use Malpighian tubules to produce silk.
Phyllophaga (June Bug) These beetles are nocturnal, coming to lights in great numbers. The adults are chafers, feeding on foliage of trees and shrubs. The larvae (called whiteâ¦ grubs) feed on the roots of grasses and other plants. The insects pupate underground in the fall and emerge as adults the following spring. Chafer grubs feed below ground for 3-4 years before changing into adult beetles. The adult beetles are very clumsy, both on land and in the air.