Fluctuación poblacional y distribución vertical del ácaro Schizotetranychus hindustanicus (Hirst, 1924), sobre especies de Citrus.

Abstract

This study was carried out on citric experimental garden of Agronomical Faculty of UCV. Persian lime, lemon, orange and tangerine plants were choosen. These plants were divided in three (3) strata: higher, medium and lower. For persian lime, orange and tangerine four leaves were choosen and for lemon eight leaves were choosen. These leaves were processed in laboratory in order to register individual number, location and distribution (grouped or isolated), predator presence, injury and other kind of mite for every growing state. The samplings were made from June 2005 to May 2006. Between abiotic factors precipitation had the biggest influence on populational density of the species S. hindustanicus having a fluctuation from 0 – 21,7; 0 – 69,17; 0 – 33,17; and 0 – 26 individual/sampling period, in orange, persian lime tangerine and lemon respectively, for June to July 2005 and April 2006, resulting the biggest populational registers, firstly in persian lime and tangerine. This abundance was related to a major number of eggs and females. Comparing to the remaining states a minor number of individual resulted. This mite species studied did not showed any preference to the strata o the plants species evaluated.