Heteropsylla cubana has caused damaging effects to Leucaena leucocephala in Tanzania
since its outbreak in 1992. The major objectives of the study were; to determine
population density of H. cubana, mummies of T. leucaena and P. yaseeni, indigenous
predators associated with H. cubana, infestation density and shoot health of
L. leucocephala resulting from H. cubana attack in Morogoro and Tanga region. The
Point Centre Quarter method was employed to select L. leucocephala for observation of
H. cubana, mummies, indigenous predators, infestation and shoot health. R and Excel
program software were used in data analysis to obtain descriptive statistics of observed
data. The mean number of eggs, small nymphs, medium nymphs, large nymphs and adults
per 15cm terminal shoot were 14.24, 11.77, 8.78, 4.79 and 2.81 in Morogoro and 11.40,
8.16, 5.80, 3.72 and 2.42 in Tanga respectively. The population density of eggs differ
significantly among crown levels (upper, middle and lower) and not significant among
dbh classes (1-5 cm, 6-15 cm and >15 cm) in Morogoro. The situation was different in
Tanga where there was no significant difference among crown level and dbh classes. The
interaction between dbh classes and crown level was not significantly different in both
Morogoro and Tanga for eggs population density. The mean number mummies of T.
Leucaenae and P. yaseeni were 2.33 and 1.68 in Tanga and 2.64 and 2.1 in Morogoro
respectively. The dominant indigenous predators found were spiders followed by ladybird
beetles, dragonflies and lacewings for adult and regenerants L. leucocephala. The
infestation density and shoot damage were slightly high in Morogoro compared to Tanga
for adults and regenerants L. leucocephala. The study has found good shoot health and
small injury to L. leucocephala. Farmers are advised to plant L. leucocephala for various
usesas psyllid’s population is no longer a problem.