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https://www.arca.fiocruz.br/handle/icict/27991
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Embargo date
2050-01-01
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ULTRASTRUCTURE OF TUTA ABSOLUTA PARASITIZED EGGS AND THE REPRODUCTIVE POTENTIAL OF FEMALES AFTER PARASITISM BY METARHIZIUM ANISOPLIAE
Minador de tomate
Patogenicidade
Controle biológico
Microscopia eletrônica
Tomato leafminer
Pathogenicity
Biological control
Electronic microscopy
Coleoptera / microbiologia
Fêmea
Fertilidade
Interações entre Hosts e Patógenos
Larva / microbiologia
Lepidoptera / crescimento e desenvolvimento
Lepidoptera / microbiologia
Lepidópteros / ultraestrutura
Metarhizium / patogenicidade
Microscopia, elétron, varredura
Microscopia Eletrônica, Transmissão
Ovum / microbiologia
Ovum / ultraestrutura
Controle de Pragas, Biológico
Reprodução
Virulência
Author
Abstract
Among the microorganisms used in biological control, the muscadine fungus Metarhizium anisopliae (Metsch.) Sorok. is produced and formulated world wide aiming to control pests from several agricultural crops. This work evaluated effects of M. anisopliae isolate UFRPE-6 on the fecundity and mortality of Tuta absoluta (Lepidoptera: Gelechiidae) females and the mechanism of infection on eggs. The infection of the females by the fungus did not affect their oviposition and fecundity; however it affected the survival with total and confirmed mortality of 54.2% and 37.14%, respectively. The eggs were treated with suspension at concentration of 10(6)conidia/mL. The analysis under scanning electron microscopy showed that conidia germination and penetration processes in the eggs of T. absoluta started within the period of 6h after the inoculation. Several hyphal bodies were observed from 12h and an intense extrusion of the mycelium covering all the external surface of the eggs 72h after inoculation. Despite its moderate activity in adults, the isolate URPE-6 of M. anisopliae showed promising in the control of T. absoluta due to its pathogenicity and virulence to eggs from this pest.
Keywords in Portuguese
Fungos entomopatogênicosMinador de tomate
Patogenicidade
Controle biológico
Microscopia eletrônica
Keywords
Entomopathogenic fungiTomato leafminer
Pathogenicity
Biological control
Electronic microscopy
DeCS
AnimaisColeoptera / microbiologia
Fêmea
Fertilidade
Interações entre Hosts e Patógenos
Larva / microbiologia
Lepidoptera / crescimento e desenvolvimento
Lepidoptera / microbiologia
Lepidópteros / ultraestrutura
Metarhizium / patogenicidade
Microscopia, elétron, varredura
Microscopia Eletrônica, Transmissão
Ovum / microbiologia
Ovum / ultraestrutura
Controle de Pragas, Biológico
Reprodução
Virulência
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