A SAMPLING SCHEME FOR ESTIMATING POPULATION DENSITY OF THE JARRAH LEAF MINER, PERTHIDA GLYPHOPA (LEPIDOPTERA: INCURV ARIIDAE)

Abstract

Densities of eggs, feeding and mature larvae of the jarrah leaf miner were estimated from samples of leaves, of larval cells from catches in cone traps placed under trees, of diapausing larvae from soil samples, and of moths from catches in emergence traps. Within the samples, homogeneity of variance and improved normality of numbers were achieved by transforming the original counts to In (x + 1).