A commercial prepartation of B.t. is used as a spray or powder and kills only caterpillars - it is not toxic to humans, other animals or plants. The drop of a gypsy moth caterpillar population to extremely low levels in a particular area. Defoliate To remove leaves from plants, trees or shrubs. A cluster of eggs laid by the gypsy moth. The number ranges from 50 to more than 1,500, with an average of about 400.
Clusters are usually buff-colored.
Entomologist A person who studies insects. Eradicate To eliminate an organism from a geographical area. So far, it has been impossible to eradicate the gypsy moth in Michigan. Negatively geotrophic means that the young caterpillars move away from the earth. The process where a young larvae comes out of its egg.