abrir - Faculdade de Ciências Agronômicas - Unesp

3
BIOECOLOGY OF BRONZE BUG Thaumastocoris peregrinus Carpintero & Dellapé
(HEMIPTERA: THAUMASTOCORIDAE) IN EUCALYPTUS AND PROSPECTION OF
NATURAL ENEMIES. Botucatu, 2010. 80 p. Dissertation (Master Science in
Agronomy/Plant Protection) - Faculdade de Ciências Agronômicas, Universidade Estadual
Paulista.
Author: EVERTON PIRES SOLIMAN
Adviser: CARLOS FREDERICO WILCKEN
SUMMARY
The bronze-bug Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae) is originated
from Australia and was spreaded rapidly in eucalyptus plantations in different countries In
Africa and South America. In Brazil, he was detectedin 2008 in staes of Sao Paulo and Rio
Grande do Sul. There is few information about its biology, then, this study aimed to
determine the bioecology of T. peregrinus in different Eucalyptus species and hybrids and at
different temperatures, besides to evaluated some natural enemies. In bioecology study were
used the species Eucalyptus camaldulensis, E. urophylla, E. grandis and three clonal hybrids
among these species in climated chamber at 26 ± 1° C, 70% ± 10% and photophase of 12 h.
The species E. urophylla was the species choosed for bioecology study at temperatures of 14,
18, 22, 26 and 30 ± 1° C, maintained the same RH and photophase conditions of previous
study. The survey of potential natural enemies was carried outthrough field observations and
laboratory tests. The biology of different materials indicated E. urophylla and E. grandis were
the best to development and reproduction of T. peregrines. However, the insect developed and
produced fertile offspring in all treatments. The temperature directly influenced the duration of
the cycle stages, and at lower temperatures development was delayed comparing to higher
temperatures. Nevertheless the bronze bug could be developed and produce fertile offspring in
all temperatures tested. In the field survey it was founded few natural enemies being some
predatory insects have adapted to prey the pest. In the field was diagnosed predation of
nymphs of T. peregrinus by Chrysoperla externa (Neuroptera: Chrysopidae) and infection by
Entomophtorales spp. in adults and nymphs. In laboratory conditions, the predator Atopozelus
opsimus (Hemiptera: Reduviidae) fed both nymphs and adults. T. peregrinus developed and