Pests and Disease
Video: Leucaena cruziana being infected by Heteropsylla cubana psyllids
“The most serious limitation of L. leucocephala is susceptibility to the psyllid defoliator “Heteropsylla cubana. Psyllids are small jumping, sap sucking, plant lice, reminiscent of aphids, which damage Leucaena trees by feeding from the phloem of developing shoots and young foliage so that damage is concentrated in these regions. While the psyllids only cause limited tree mortality, severe and cyclical defoliation, deformation, stunting and dieback mean that farms and communities that had come to rely on L. leucocephala for leaf products, such as dry season livestock fodder or green manure, were suddenly faced with shortages and loss of income.” From Colin E. Hughes, Leucaena: a Genetic Resources Handbook, 1998.