Type of Document	Dissertation
Author	Baer, Ronald G
URN	etd-06082010-020710
Title	A morphological and systematic study of the first and second instars of the Kermesidae in the Nearctic region (Homoptera: Coccoidea)
Degree	Ph. D.
Department	Entomology
Advisory Committee	Advisor Name Title M. Kosztarab Committee Chair H. J. Heikkenen Committee Member J. A. Fox Committee Member John L. Eaton Committee Member W. H. Robinson Committee Member
Keywords	Scale insects
Date of Defense	1978-08-01
Availability	restricted
Abstract The Cocco idea or scale insects are among the most important pests of sylvicultural, ornamental, agricultural and greenhouse plantings throughout the world. There are 21 families comprising 6,000 species. Direct injury occurs from the withdrawal of sap while feeding and from the production of galls. Some scale insects are host specific while others are polyphagous. They feed on many different parts of plants including the roots, trunk, stems, leaves, buds and fruit.
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