2010
DOI: 10.1590/s0100-69162010000500017 View full text |Buy / Rent full text
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Abstract: RESUMO:Os avanços da tecnologia de aplicação aérea de agroquímicos têm-se dado na direção de redução do volume de calda, o que pode ocasionar má distribuição e consequente deposição irregular. O presente trabalho teve como objetivo avaliar a qualidade da aplicação de calda de pulverização em aplicação aérea, na cultura da soja (Glycine Max L.). Para a aplicação, foi utilizada uma aeronave agrícola experimental, aplicando um volume de calda de 20 L ha -1 . Para a determinação dos volumes depositados nas folhas … Show more

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“…The umbrella effect, formed by the upper leaves, should be considered because it may interfere with the fungicide spray distribution to the lower third. These results are in agreement with CUNHA et al (2010) that carried out fungicide application in corn and found similar results.…”
Section: Resultssupporting
“…REIS et al (2010), evaluating the application quality of spray in aerial application, noted similar characteristics, where smaller VMD values were found in the lower thirds of the crop. Analyzing the drops characteristics captured by sensitive papers in the aerial treatment in 2014, there was a malformation in the drops deposit, showing a scattered form, not producing on its formation, spray drop spectrum but stains drops, especially in the upper third of the corn.…”
Section: Resultsmentioning
“…In the target kit ® system, spray hydraulic circuit nozzles are set in a bar and dragged on the crop, assuming greater coverage of the lower leaves of soybean, where the infection of diseases starts, as claimed by ALMEIDA et al (2005), CALLA et al (2009), REIS et al (2010) and CUNHA et al (2011. Since the motion of most fungicides is acropetal (SWOBODA & PEDERSEN, 2009;ANTUNIASSI et al, 2011 andLENZ et al 2011), spraying the base of plants suggests significantly a more effective control of the diseases when compared to sprayings by tips distant from the apex of soybean plants.…”
Section: Resultsmentioning
“…Thus, the lower third of plant presents ideal environmental conditions since it keeps the leaf wetness for a longer period of time. Likewise, it is here that the coverage and penetration of the fungicide are more adversely affected by the leaf weight of tops to form a barrier spraying, favoring the pathogen (ALMEIDA et al 2,005;CALLA et al 2,009;REIS et al, 2010;CUNHA et al, 2011). Like most systemic fungicides suitable for chemical control of soybean foliar diseases move in the direction of the base to the apex of the plant, the leaves of the lower third of the plant become the target of spraying (SWOBODA & PEDERSEN, 2009;ANTUNIASSI et al, 2011;LENZ et al, 2011).…”
Section: Introductionmentioning
“…All the samples were analyzed in the Agronomic Laboratory of Soil, Leaf and Water Analysis (LAGRO) at the University Center of North of Espirito Santo of the Federal University of Espírito Santo. The tracer deposition in these samples (coffee leaves, Petri dishes, plastic labels, and weeds) were performed using visible UV spectrophotometry (Reis, Queiroz, Cunha, & Alves, 2010).…”
Section: Methodsmentioning