Sampling types and population evolution of the spittlebug

Abstract

The present work was conducted in field and in laboratory by using nymph-infested grass, grown in plastic trays. The field sampling was done at intervals of two weeks by collecting adults with sweeping nets and by counting the number of nymphs and spittles per square meter. The population evolution was measured by nymph development and by taking the number of generations attained. The results showed that sampling young form of spittlebug may be done by counting spittle and that the nymph development makes possible the determination of the generation number of the spittlebug. Deois flavopicta produced 3.3 generations in one year, taking each a mean of 79.7 days, with overlapping of the generation periods.