Symbiotes of Planthoppers : II. Isolation of Intracellular Symbiotic Microorganisms from the Brown Planthopper, Nilaparata lugens STAL, and Immunological Comparison of the Symbiotes Associated with Rice Planthoppers (Hemiptera : Delphacidae)

Two morphologicaly different yeast-like symbiotes were isolated from eggs of the brown planthopper, Nilaparvata lugens STAL. They were identified immunologically with the intracellular symbiotes found in eggs and in the adult insects. The two isolated microorganisms from the egg have common antigenicity with those isolated from the smaller brown planthopper, Laodelphax striatellus FALLEN, and from the white backed planthopper, Sogatella furcifera HORVATH.