Information on crop age, class and farm management was obtained and used
in the data analysis as independent variables with pest species and infestation levels
as dependent variables (SAS, 2003). Climates at Pasuruan and Bogor were matched
with those in major canegrowing areas of Australia using the program CLIMEX as
used by FitzGibbon et al. (1999).
Results and discussion
Species identification and damage symptoms
We found five species of moth borers belonging to four families: Chilo
auricilius and C. sacchariphagus (Lepidoptera: Crambidae), Scirpophaga excerptalis
(Lepidoptera: Pyralidae), Sesamia inferens (Lepidoptera: Noctuidae), and Tetramoera
schistaceana (Lepidoptera: Tortricidae). Both S. inferens and T. schistaceana were
very rarely encountered and were not included in the data analysis. The following are
observations on the identification and damage symptoms of these pest species.