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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.1976.tde-20240301-154206
Document
Author
Full name
José Cola Zanuncio
Institute/School/College
Date of Defense
Published
Piracicaba, 1976
Supervisor
Title in Portuguese
Efeito do controle químico e microbiológico sobre três pragas de eucalipto e outros insetos
Keywords in Portuguese
CONTROLE BIOLÓGICO
EUCALIPTO
INSETICIDAS
INSETOS NOCIVOS
PRAGAS DE PLANTAS
Abstract in Portuguese
Os ensaios de laboratório foram realizados na Universidade Federal de Viçosa, Minas Gerais, (Brasil), e experimentos de campo executados em Coronel Fabriciano, Minas Gerais, com E. apisaon. Também foram realizados experimentos de campo com S. violascens e E. involuta em Curvelo, Minas Gerais (Brasil). Todos os ensaios foram realizados com Eucalyptus spp. Nos experimentos realizados em laboratório, constatou-se que os produtos Dipel, Malathion e Bacillus thuringiensis var. kurstacki, isolados de lagartas de E. apisaon mortas, por Dipel, apresentaram mortalidade semelhante neste inseto e tais produtos não diferem, estatisticamente, entre si, mas sim da testemunha. Viu-se também que as lagartas de E. apisaon, testadas com Malathion, apresentaram uma menor área foliar comida, como consequência de uma mortalidade mais rápida. Pelas provas bioquímicas foi comprovada a identidade de Bacillus thuringiensis var. kurstacki nas culturas isoladas e estas foram patogênicas para lagartas de E. apisaon. No uso de Malathion, Dipel + Malathion e Dipel sobre E. apisaon, em condições de campo, comprovou-se a eficiência destes produtos, com menor efeito do Dipel sobre outros insetos. No uso do inseticida biológico e dos produtos químicos sobre S. violascens, verificou-se a eficiência de todos os inseticidas. Para a E. involuta, verificou-se uma boa eficiência desses produtos usados. Em relação aos predadores, tanto o Dipel como o Fenatol tiveram uma ação semelhante, não diferindo, estatisticamente, da testemunha, enquanto, o Sumithion e o Malathion causaram alta mortalidade destes insetos.
Abstract in English
The laboratory experiments were done at the Universidade Federal de Viçosa, Minas Gerais, Brasil. The field experiments with Euselasia apisaon (Dalman, 1823) were done at Coronel Fabriciano, Minas Gerais, while those with Sarsina violascens (Herrich-Schaeffer, 1856) and Eupseudosoma involuta (Sepp, 1852) were done at Curvelo, Minas Gerais. The hosts in all experiments were Eucalyptus spp. The laboratory experiments showed that Dipel + Malathion and Bacillus thuringiensis variety kurstacki (Berliner, 1915), which had been isolated from larvas of Euselasia apisaon that were killed by Dipel, killed a similar number of the test insects, which was statistically significantly different from the controls. Larvas, treated with Malathion alone, ate less leaf tissue than in the other treatments because they died more quickly. The identification of Bacillus thuringiensis var. kurstacki was confirmed by biochemical tests of isolates that were pathogenic to Euselasia apisaon. In field experiments, Malathion, Dipel + Malathion and Dipel were effective against Euselasia apisaon until the fifth day after treatment. Dipel was less effective against others insects. Dipel, Fenatol, Malathion and Sumithion were effective against S. violascens, Likewise, Dipel was the most effective against Eupseudosoma involuta. Dipel, Fenatol, had no effect against predators. Sumithion and Malathion produced high mortality among these insects.
 
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Publishing Date
2024-03-14
 
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