Sakagami, Y., & Korenaga, R. 1982 Studies on forecasting the occurrence of the arrowhead scale, Unaspis yanonensis Kuwana. II. Forecasting initial occurrence date of the first instar larvae by multiple regression equation.. Bulletin of the Fruit Tree Research Station Series B (Okitsu) 9: 35-51.

Notes: Used meteorological data and observation data for 16 years for estimating equations for forecasting.