Testes de potencial de dano e de especificidade com Calophya terebinthifolii Burckhardt &Basset, 2000 (Hemiptera : Psyllidae) para o controle biológico da aroeira Schinus terebinthifolius Raddi (Anacardiaceae) no Estado da Flórida - EUA

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

Aroeira (or Brazilian peppertree), Schinus terebinthifolius Raddi (Anacardiaceae), is a highly invasive weed in subtropical regions worldwide. The leaflet-galling psyllid Calophya terebinthifolii Burckhardt &Basset (Hemiptera: Psyllidae), a natural enemy of aroeira, was investigated in the laboratory and field for its biological control potential. Preliminary host range studies, dispersal and field efficacy experiments were conducted at the Forest Nursery, Gaspar, and Forest Protection Laboratory, Blumenau, Santa Catarina, Brazil. Representative species in the plant family Anacardiaceae were exposed to C. terebinthifolii in a series of open field and greenhouse multiple-choice tests. Results of the host-specificity tests showed that the psyllid completed its development only on aroeira and the closely related Schinus molle L. Gall development under field conditions was influenced by abiotic factors, i.e., temperature and rainfall as well as varietal differences in aroeira. Schinus terebinthifolius var. raddianus was more heavily attacked by the psyllid than the varieties S. t. var acutifolius and S. t. var. rhoifolius. Gall formation by the developing nymphs of C. terebinthifolii induced leaflet abscission, and also affected plant development by limiting biomass production. The psyllid also exhibited the capacity for long distance dispersal during peak population periods.

ASSUNTO(S)

controle ambiental especificidade natural enemy plantas - controle biológico; inseto - controle biológico galls psyllidae inimigo natural psyllidae specificity galhas

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