Qualidade de pulverização pneumática de defensivos agrícolas em cafeeiro conilon

• Autor(a) principal: Oliveira, Pablo Souto
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/8263
• topic: Coffea canéfora; Application technology; Pneumatic cannon; Café conilon; Tecnologia de aplicação; Canhão pneumático; Coffea canephora; Agronomia; Defensivos vegetais; Agricultura e tecnologia; Pulverização; 63

The occurrence of pests, diseases and weeds in agro-ecosystem in important crops (soybeans, corn, wheat, rice, cotton, coffee) are causing major productivity losses of 30% of the productive potential in the world average, even with control practices. A major factor affecting the coffee productivity is the presence of pests and diseases. With the expansion of coffee plantations and adopting the high density planting system is established environmental conditions favorable to the development of pests and diseases of major economic importance, foremost among them, the borer-coffee (Hypothenemus hampei F.) and the rust of coffee (Hemileia vastatrix Berk & Br.). In infestations of culture by these agents, the use of control measures necessary to prevent economic damage occurs mainly by the use of plant protection products, applied mostly via spraying. The effectiveness of the phytosanitary control, spraying is subject not only to the use of proven action products, but also the right time of your application using the appropriate equipment, ensuring high application efficiency, reducing losses and environmental contamination. There is a growing use of tractor-implement pneumatic sprays the coffee plantations of Espirito Santo north due to densification of the plantations, the fall of orthotropic branches by weight of fruit production and the need for emergency interventions. There are some questions about the gun type spray application efficiency in coffee plantations, many without any scientific basis. The aim of this study was to evaluate the spray deposition in Conilon coffee applied by pneumatic spraying. The experiment was installed in a property in the city of Nova Venécia-ES were demarcated plants aligned to the direction of the spray jet, perpendicular to the crop rows. The crop has spacing of 3.60 m between rows and 1.00 m between plants, which presented the application of the occasion, The experimental area consisted of 16 consecutive plants selected by line of coffee, and the 4 business, centers, 8 lines consecutive coffee and parallel to the traversal of the tractor-sprayer set data were collected December 15, 2015. The experimental plot consisted of a plant. a completely randomized experimental design was used with four replications in a plot scheme split 8 x 2 x 3, combining the eight rows of coffee plants, the two sides of the coffee from the line and the two-thirds of the plant (lower, secondary and higher). The leaf area was obtained by means of a leaf area meter mark LI-COR Model LI-3100C for individual reading. In conclusion, there was greater deposition to a distance of 10.80 meters and the front side of the spray was higher deposition in the middle and upper third and the back side deposition was similar in the three thirds.