The effect of the leucaena psyllid on the yield of Leucaena leucocephala cv. Cunningham at four sites in the tropics [Indonesia; Australia; Heteropsylla cubana Crawford]

Palmer, B.; Fulloon, M.G.; Bray, R.A. . Div. of Tropical Crops and Pastures; Ibrahim, T.M.

The effect of the leucaena psyllid on the yield of Leucaena leucocephala cv. Cunningham at four sites in the tropics [Indonesia; Australia; Heteropsylla cubana Crawford]

1989

Palmer, B. | Fulloon, M.G. | Bray, R.A. (Commonwealth Scientific and Industrial Research Organization, Aitkenvale (Australia). Div. of Tropical Crops and Pastures) | Ibrahim, T.M. (SBBT, Galang (Indonesia))

At 2 sites in Indonesia and 2 in Australia, the effect of leucaena psyllids on dry matter yield was examined by comparing the yield from plots sprayed with insecticide and unsprayed plots over a period of approximately 1 year. In Australia, total dry matter production when psyllids were not controlled was reduced to about 45 percent of that in the sprayed treatment. At 1 site in Indonesia, total yield was reduced by one third while at the other psyllids did not appear to affect yield. The large amount of damage possible in the first year suggests that psyllids could be a major factor in hindering establishment and reducing yield. Further work is needed to establish the factors responsible for variations in damage levels at different sites.

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