SciELO - Scientific Electronic Library Online

 
vol.22 issue4PRELIMINARY RESULTS OF A LARGE-SCALE TREE INVENTORY OF UPLAND RAIN FOREST IN THE CENTRAL AMAZON author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Acta Amazonica

Print version ISSN 0044-5967On-line version ISSN 1809-4392

Abstract

ZANUNCIO, José Cola; GUEDES, Raul Narciso Carvalho; CRUZ, Adalton Pinheiro da  and  MOREIRA, Antônio Maurício. EFICIÊNCIA DE Bacillus thuringieneisE DE DELTAMETRINA, EM APLICAÇÃO AÉREA, PARA O CONTROLE DE Thyrinteina arnobiaSTOLL, 1782 (LEPIDOPTERA: GEOMETRIDAE) EM EUCALIPTAL NO PARÁ. Acta Amaz. [online]. 1992, vol.22, n.4, pp.485-492. ISSN 0044-5967.  https://doi.org/10.1590/1809-43921992224492.

The relative efficiency of Bacillus thuringiensis formulations in aerial applications against Thyrinteina amobia (Lepidoptera: Geometridae) was evaluated in this essay in comparison with deltamethrin. The essay was carried out in Eucalyptus urophylla plantation in Monte Dourado, Fará, Brazil, through aerial application in areas of 10 ha (100 x 1000 m) for each treatment involving commercial formulations of B. thuringiensis and/or deltamethrin. Data were collected in five sample points for each treatment, 24, 40, 72. 96 and 120 hours after the insecticide applications and after 144 hours a drastic spraying with malathion and deltamethrin was made in order to know the total insect number in each sample point. Deltamethrin showed a faster effect over the caterpillar populations and higher efficiency at 200 and 400 ml/ha. The action of B. thuringiensis was slower, but high quality formulations of this bacteria seem to be promising against caterpillars in reforestation areas of the Amazon region, and can be used isolated or in mixture with deltamethrin for a faster effect. Deltamethrin besides B. thuringiensisshowed little effect on predators Hemiptera and because of this it can be applied against eucalyptus caterpillars, preserving their natural enemies.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )