Bordeaux mixture and Diabrotica speciosa adults extract effect on plant sanitary management in common bean grown under organic crop system / Efeito da calda bordalesa e extrato de adultos de Diabrotica speciosa no manejo fitossanitário de feijoeiro cultivado sob o sistema orgânico
José Stüpp, João; Antônio de Souza Gonçalves, Paulo; Inês Carissimi Boff, Mari.
Rev. Ciênc. Agrovet. (Online)
; 11(3): 222-229, 2012.
Artículo
en Portugués
|
LILACS-Express
| ID: biblio-1487939
The occurrence of insect pests is one of the major causes of low yields and inconstant levels of production of common bean crops. The organic production systems do not allow the use of synthetic chemical substances to manage insect pests. The objective of this work was to evaluate the repellent effect of Bordeaux mixture and fresh extract of Diabrotica speciosa adults against the main herbivorous Coleopterans species associated to organic common bean crops on the incidence of fungal diseases, the toxicity of copper and the bean grain production. The experiments were carried out at an agroecological area located in Rio do Sul, district of Santa Catarina State, during the first and second bean crop season (summer 2004/05). Each experiment was carried out in a completely randomized design with seven treatments and four replications. The replications consisted of nine rows of common bean plants at a 12 square meter area. The Bordeaux mixture was tested at the concentrations 0.15, 0.30, 0.50 and 1.00% and the fresh D. speciosa extract was tested at the concentrations 800 and 1600 insects ha-1. No substance was applied to the control replicates. The weekly treatments began when bean plants had 50% of the first definitive leaf expanded and lasted until the beginning of the flowering period. In both experiments, the assessment of herbivorous coleopteran species was carried out daily by
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BR68.1
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