Premium
Larval densities and a life‐table for the gypsy moth, Lymantria dispar , estimated using the head‐capsule collection method
Author(s) -
HIGASHIURA YASUTOMO
Publication year - 1987
Publication title -
ecological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 81
eISSN - 1365-2311
pISSN - 0307-6946
DOI - 10.1111/j.1365-2311.1987.tb00981.x
Subject(s) - frass , lymantria dispar , gypsy moth , biology , larva , population , instar , head (geology) , population density , ecology , demography , sociology , paleontology
. 1. In order to estimate the absolute larval density in each stage of a larval population of the gypsy moth, Lymantria dispar L., in a deciduous forest in northern Japan, the head‐capsule collection method was used. An estimate by this method was compared with estimates based on two kinds of frass collection methods. 2. Twenty‐one traps made of cloth were put in a study plot. Each trap was of 24.5 cm diameter. Larval head‐capsules falling into the traps were collected and sorted by hand. On the first sampling occasion, the population was also estimated using the frass‐collection method. 3. Larval numbers estimated by the head‐capsule collection method were almost identical to estimates by the two frass methods. Larval numbers entering the four larval instar were successfully estimated by the head‐capsule collection method, and an age‐specific life table was established using the resultant estimates.