R.A. BRAY and T.D. WOODROFFE

CSIRO, Division of Tropical Crops and Pastures, 306 Carmody Road, St. Lucia, Qld, 4067.

Abstract

Twenty lines representing 4 Leucaena species (L. leucocephala, L. diversifolia, L. collinsii, L. pallida) were screened for resistance to the leucaena psyllid by placing potted seedlings in an infested field planting of L. leucocephala. Estimates of numbers of adult psyllids, egg numbers, nymph numbers, and plant damage were recorded. All 4 L. leucocephala lines were susceptible. L. collinsii had least damage. All species were damaged to some extent, but there were differences between accessions within L. diversifolia, L. collinsii, and L. pallida. All estimates of psyllid susceptibility were well correlated.