An abnormal sanitary situation was detected in the surroundings of Valdivia city which affected to Ulex europaeus, an important weed in silvoagricultural systems.
It was determined that the death of branches and twigs in this species was produced by the action of both Icerya purchasi insect and Capnodium sp. fungus.
The following insects were found to be associated to U. europaeus: Apion ulicis, Rodolia cardinalis, Vespula germanica, Ericmodes sp. and a coleopterous (Nitidulidae) not indentified yet.
I. purchasi and Capnodium sp. were also detected on Cytisus monspessulanus, another important weed in silvoagricultural systems.
It is pointed out the convenience of studyng the biology of the harmful organisms mentioned above, due the importance they could have as biological controllers of U. europaeus and C. monspessulanus weeds.