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Evaluation of the deposition of syrup of spraying depending on the type of edge and the amount applied, in the culture of beans

By Aline Regina Limberger

Abstract

A cultura do feijÃo (Phaseolus vulgaris L.) à uma das mais importantes na agricultura brasileira. A ocorrÃncia de doenÃas à um sÃrio fator de influÃncia no seu desenvolvimento e produtividade. Um dos pontos crÃticos do atual sistema de produÃÃo de culturas agrÃcolas à o uso de agrotÃxicos, que, alÃm de elevar o custo de produÃÃo, pode causar contaminaÃÃes ambientais diretas e indiretas. A escolha e o uso adequado de bicos de pulverizaÃÃo sÃo essenciais para a correta aplicaÃÃo de agrotÃxicos. Diante dessas necessidades foi conduzido o presente trabalho no municÃpio de Cascavel â PR, na safra de 2004/2005, utilizando a variedade IAPAR 81, com o objetivo de avaliar a quantidade de calda depositada nas folhas do feijÃo, variando-se o volume de calda aplicada e os tipos de bicos utilizados na barra de pulverizaÃÃo, utilizando-se substÃncia traÃadora, simulando as caracterÃsticas fÃsicas das soluÃÃes de produtos fitossanitÃrios. Para avaliar a distribuiÃÃo da pulverizaÃÃo, foram coletadas quinze folhas por planta em diferentes extratos (superior, mediano e inferior), com a finalidade de avaliar a penetraÃÃo da calda, de acordo com os diferentes bicos e volumes aplicados. O delineamento experimental constituiu-se de blocos ao acaso, em arranjo fatorial, compreendendo 4 bicos de pulverizaÃÃo com pontas do tipo leque simples, duplo leque, duplo leque com injeÃÃo de ar e cone vazio e 3 volumes de calda (100, 200 e 300 L ha-1 ). De acordo com os resultados obtidos e nas condiÃÃes em que o presente trabalho foi conduzido, concluiu-se que: o volume de calda que apresentou maiores deposiÃÃes, nos diferentes extratos das plantas de feijÃo foi o de 300 L ha-1; para maiores deposiÃÃes no terÃo superior das plantas de feijÃo, a melhor combinaÃÃo à utilizar bicos de Cone Vazio, com volumes de calda de 300 L ha-1 e para maiores deposiÃÃes no terÃo mediano e inferior das plantas de feijÃo, a melhor combinaÃÃo à utilizar bicos Duplo Leque com injeÃÃo de ar , com volumes de calda de 100 ,200 ou 300 L ha-1The culture of the beans (Phaseolus vulgaris L.) is one of most important in Brazilian agriculture. The occurrence of illnesses is a serious factor of influence in its development and productivity. One of the critical points of the current system of production of agricultural cultures is the use of defensive defensive, besides raising the production cost, can cause direct and indirect ambient contaminations. The choice and the adequate use of spraying beaks are essential for the correct application of defensive. Due to those needs the present work was carried out in CascavelâPR, in the harvest 2004/2005, using the beans IAPAR 81, with the objective evaluating the amount of syrup deposited on the beans leaves, varied the volume of syrup applied and the beaks types used in the spraying bar, used tracer substance, simulating the physical characteristics of the solutions of the products. To evaluate the spraying distribution, fifteen leaves were collected per plant in different extracts (higher, medium and lower), with the purpose of evaluating the syrup penetration, in agreement with the different beaks and applied volumes. The experimental design was arranged in randomized complete blocks, in factorial arrangement, with four beaks and point of the type simple fan, double fan, double fan with air injection and empty cone and 3 syrup volumes (100, 200 and 300 L ha-1). In agreement with the results obtained and in the conditions that the present work was carried out.,concluded that: The syrup volume that presented larger depositions , in different extracts of the beans plants was of 300 L ha-1; for larger depositions in the higher extract of the beans plants, the best combination is to use beaks of Empty Cone, with volumes of the 300 L ha-1 and for larger depositions for the medium and lower extracts of the bean plants, the best combination is to use peaks Double Fan with air injection, volumes of 100, 200 or 300 L ha-

Topics: AGRONOMIA, Tecnologia de aplicaÃÃo, Pontas de pulverizaÃÃo, Bicos de pulverizaÃÃo, Volume de calda, TraÃadores, Application technology, Spraying tips, Sparying beaks, Syrup volume, Tracers, AGRONOMIA
Publisher: Universidade Estadual do Oeste do Parana
Year: 2006
OAI identifier: oai:agregador.ibict.br.BDTD_UNIOESTE:oai:unioeste.br:188
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