Qualidade da pulverização em volume reduzido para o controle do bicho-mineiro Leucoptera coffeella (Guérin-Mèneville & Perrottet, 1842) (Lepidoptera: Lyonetiidae)
Carregando...
Arquivos
Data
2014-04-25
Autores
Lasmar, Olinto [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
O controle do bicho-mineiro Leucoptera coffeella é feito principalmente através de pulverizações foliares com volumes altos de calda. Como alternativa promissora no manejo de pragas na cafeicultura há a aplicação em volume reduzido, que aplica menores volumes de água e economiza recursos operacionais. Esta pesquisa teve como objetivo avaliar a qualidade da pulverização de inseticida na cultura do café utilizando volume reduzido com diferentes concentrações de adjuvante (óleo mineral) para controle do bicho-mineiro (L. coffeella). As avaliações do trabalho foram: cinética da tensão superficial e do ângulo de contato de gotas, retenção foliar e influência de chuva artificial sobre folhas de cafeeiro tratadas com caldas fitossanitárias constituídas por diferentes concentrações de óleo mineral a 5, 10, 15 e 20% (v/v), representando caldas fitossanitárias possíveis de utilização num pulverizador de volume reduzido, mais a concentração de 0,5% (v/v), comumente utilizada em turbo-pulverizadores tradicionais; além disso, com estas caldas avaliaram-se o tamanho de gotas com diferentes tipos de bocais pneumáticos (jato plano, jato cônico, modelo AT-1000 e efervescente), depósito de marcador, cobertura foliar, controle do inseto alvo e a distribuição espacial de deriva a partir de um pulverizador protótipo de volume reduzido comparado ao pulverizador de jato transportado. As caldas fitossanitárias nas concentrações de óleo mineral a 5 e 10% (v/v) proporcionam as melhores condições para utilização em um pulverizador de volume reduzido. Tanto caldas aquosas quanto caldas oleosas, aplicadas sobre plantas de café apresentam características semelhantes em relação à quantidade de depósito após uma chuva de 20 mm. A aplicação em volume reduzido, proporcionada pelo protótipo de um pulverizador com bocais pneumáticos do tipo efervescente, comparada ao turbopulverizador tradicional, apresenta boas ...
The control of leaf miner Leucoptera coffeella is made primarily through foliar sprays with high spray volumes. As a promising alternative for the management of pests in coffee crop there is application in reduced volume, applying smaller volumes of water and saves operating resources. This research aimed to study the quality of reduced volume of insecticide application with different concentrations of adjuvant (mineral oil) in spraying liquids to control L. coffeella. The actions contemplated in the study were: to evaluate the kinetics of surface tension and contact angle of droplets; leaf retention and influence of artificial rain on coffee leaves treated with spraying liquids consisting of different concentrations of mineral oil 5, 10, 15 and 20% (v/v), representing possible spraying liquids for use in reduced volume sprayer, plus the concentration of 0.5% (v/v), commonly used in conventional air-blast. Furthermore, with these spraying liquids was evaluated the droplet size with different pneumatic nozzles (flat fan, conical jet, AT-1000 model and effervescent); tracer deposit; leaf spray coverage; control of the target insect and spatial distribution of drift, comparing the sprayers. The spraying liquids in concentrations of mineral oil 5 to 10% (v/v) provide the best conditions for use in a reduced volume sprayer. Both aqueous spraying liquids as oil spraying liquids, applied on coffee plants, have similar characteristics in terms of the amount of deposit after a rain of 20 mm. The reduced volume application provided by the prototype of a pneumatic sprayer nozzles with the effervescent type, compared to traditional air-blast, presents good condition, especially in relation to deposit of spraying liquid and L. coffeella control. Regarding the drift of spraying liquids applied by a prototype reduced volume sprayer, the proposed method is reliable and representative for techniques of collecting drops, tracer extraction and analysis ...
The control of leaf miner Leucoptera coffeella is made primarily through foliar sprays with high spray volumes. As a promising alternative for the management of pests in coffee crop there is application in reduced volume, applying smaller volumes of water and saves operating resources. This research aimed to study the quality of reduced volume of insecticide application with different concentrations of adjuvant (mineral oil) in spraying liquids to control L. coffeella. The actions contemplated in the study were: to evaluate the kinetics of surface tension and contact angle of droplets; leaf retention and influence of artificial rain on coffee leaves treated with spraying liquids consisting of different concentrations of mineral oil 5, 10, 15 and 20% (v/v), representing possible spraying liquids for use in reduced volume sprayer, plus the concentration of 0.5% (v/v), commonly used in conventional air-blast. Furthermore, with these spraying liquids was evaluated the droplet size with different pneumatic nozzles (flat fan, conical jet, AT-1000 model and effervescent); tracer deposit; leaf spray coverage; control of the target insect and spatial distribution of drift, comparing the sprayers. The spraying liquids in concentrations of mineral oil 5 to 10% (v/v) provide the best conditions for use in a reduced volume sprayer. Both aqueous spraying liquids as oil spraying liquids, applied on coffee plants, have similar characteristics in terms of the amount of deposit after a rain of 20 mm. The reduced volume application provided by the prototype of a pneumatic sprayer nozzles with the effervescent type, compared to traditional air-blast, presents good condition, especially in relation to deposit of spraying liquid and L. coffeella control. Regarding the drift of spraying liquids applied by a prototype reduced volume sprayer, the proposed method is reliable and representative for techniques of collecting drops, tracer extraction and analysis ...
Descrição
Palavras-chave
Café, Café - Doenças e pragas - Controle, Inseto, Pulverização, Defensivos vegetais - Tecnologia de aplicação, Bicho-mineiro-do-cafeeiro, Coffee
Como citar
LASMAR, Olinto. Qualidade da pulverização em volume reduzido para o controle do bicho-mineiro Leucoptera coffeella (Guérin-Mèneville & Perrottet, 1842) (Lepidoptera: Lyonetiidae). 2014. xvii, 85 p. Tese (doutorado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias, 2014.