ESTUDIO ECOLÓGICO DE LAS CECIDIAS DEL GÉNERO SCHINUS, ESPECIALMENTE LAS DE HOJA Y DE RAMA DE 5. POLYGAMUS Y S. LATIFOLIUS (ANACARDIACEAE), EN CHILE CENTRAL

Resumen

This paper is organized in two parts: a) cecidia identification in the genus Schinus; b) biological description
of the development of cecidia in leaves and twigs of Schinus polygamus and S. latifolius.
Fourteen different kind of cecidia were detected in Schinus, seven of which were described for the first
time. S. polygamus was the most affected. The relationships between incidence of cecidia, age of plants and
anthropic intervention were tested.
Related to cecidia in leaves and twigs of S. polygamus and S. latifolius, the following aspects were analyzed,
throughout an annual cycle: size and color of cecidia, “cecidia per leaf ’ ratio, size, biological aspects of
gall-makers and parasitoids, relationships between the life cycle of cecidogenous insects and the phenology of
plants.
All cecidia analyzed were induced by Psylloidea (Hemiptera). Those of leaves by Calophya mammifex and
those of S. polygamus twigs by Taynaris sórdida and Calophya rubra.
The life cycle of Psylloidea in leaves was univoltine and probably bivoltine in twigs, with reinfection by
the later nymphal stage. The cecidia in twigs of S. polygamus present two morphological shapes: spherical in
winter and conical in summer.