This paper describes an epizootic of the entomopathogenic fungus Neozygites parvispora occurring in a population of Frankliniella occidentalis in a pepper crop under plastic-house, in south-eastern Sicily (Italy). The progress of the epizootic in the thrips population was monitored weekly, from December 1990 to April 1991. Infections of N. parvispora caused up to more than 60 % mortality of the mobile developmental stages of the thrips, reducing consistently both the insect population density and the proportion of flowers and leaves infested by thrips. All mobile developmental stages of the thrips (adults, 1 st- and 2nd-instar larvae) were susceptible to the infections of N. parvispora. The incidence of mycosis in each developmental stage was positively correlated with its respective proportion in the thrips population.
EPIZOOTIOLOGICAL STUDY OF NEOZYGITES PARVISPORA (ZYGOMYCOTA, ENTOMOPHTHORACEAE) IN A POPULATION OF FRANKLINIELLA-OCCIDENTALIS (THYSANOPTERA, THRIPIDAE) ON PEPPER IN SICILY
CACCIOLA, Santa Olga;
1994-01-01
Abstract
This paper describes an epizootic of the entomopathogenic fungus Neozygites parvispora occurring in a population of Frankliniella occidentalis in a pepper crop under plastic-house, in south-eastern Sicily (Italy). The progress of the epizootic in the thrips population was monitored weekly, from December 1990 to April 1991. Infections of N. parvispora caused up to more than 60 % mortality of the mobile developmental stages of the thrips, reducing consistently both the insect population density and the proportion of flowers and leaves infested by thrips. All mobile developmental stages of the thrips (adults, 1 st- and 2nd-instar larvae) were susceptible to the infections of N. parvispora. The incidence of mycosis in each developmental stage was positively correlated with its respective proportion in the thrips population.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
