Mass spectometry to analyse sterol in phytophagous insects

1. 1. Sterold have been extracted from 3 insects, Calotermes flavicollis, Gryllus domesticus and Apis mellifica, and their characteristics determined by means of mass spectrometer. 2. 2. Cholesterol is the principal sterol of Calotermes and Gryllus. 3. 3. The principal sterol in Apis is 24-methylene cholesterol. 4. 4. The presence of minor sterols is reported