Spray deposition and chemical control of the coffee leaf-miner with different spray nozzles and auxiliary boom
ABSTRACT The coffee crop requires great spray ability to penetrate into the plant canopy during the application of pesticides. The aim of this study was to evaluate the spray deposition on leaves of coffee plants and the chemical control of the leaf miner provided by the application of different spray nozzles, with and without the use of an auxiliary boom. The deposition on the upper, middle and lower parts of the plants and the losses to the soil were evaluated using a tracer quantified by spectrophotometer. We also evaluated the chemical control of the leaf miner, counting the larvae, after the application of the insecticides cartap and fenpropathrin. The trial was carried out in a randomized block design, with four replications, in a factorial model (2×2+1): with and without the auxiliary boom, three spray nozzles (hollow cone – MAG 02, flat fan – AD 11002 and air induction hollow cone – TVI 8002) and a control. The use of the auxiliary boom increased the deposition in the lower part of the plants but decreased in the middle part, besides the increase in the runoff. The different nozzles do not provided differences in the deposition, showing the technical feasibility in the use of the hollow cone nozzles with coarse droplets and flat fan. All the chemical control decreased the leaf miner population, without differentiation.
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Associação Brasileira de Engenharia Agrícola
2016
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oai:scielo:S0100-691620160004006562016-09-21Spray deposition and chemical control of the coffee leaf-miner with different spray nozzles and auxiliary boomGITIRANA NETO,JEFFERSONCUNHA,JOÃO P. A. R. DA Coffea arabica L Leucoptera coffeella spray application technology ABSTRACT The coffee crop requires great spray ability to penetrate into the plant canopy during the application of pesticides. The aim of this study was to evaluate the spray deposition on leaves of coffee plants and the chemical control of the leaf miner provided by the application of different spray nozzles, with and without the use of an auxiliary boom. The deposition on the upper, middle and lower parts of the plants and the losses to the soil were evaluated using a tracer quantified by spectrophotometer. We also evaluated the chemical control of the leaf miner, counting the larvae, after the application of the insecticides cartap and fenpropathrin. The trial was carried out in a randomized block design, with four replications, in a factorial model (2×2+1): with and without the auxiliary boom, three spray nozzles (hollow cone – MAG 02, flat fan – AD 11002 and air induction hollow cone – TVI 8002) and a control. The use of the auxiliary boom increased the deposition in the lower part of the plants but decreased in the middle part, besides the increase in the runoff. The different nozzles do not provided differences in the deposition, showing the technical feasibility in the use of the hollow cone nozzles with coarse droplets and flat fan. All the chemical control decreased the leaf miner population, without differentiation.info:eu-repo/semantics/openAccessAssociação Brasileira de Engenharia AgrícolaEngenharia Agrícola v.36 n.4 20162016-08-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000400656en10.1590/1809-4430-Eng.Agric.v36n4p656-663/2016 |
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GITIRANA NETO,JEFFERSON CUNHA,JOÃO P. A. R. DA |
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GITIRANA NETO,JEFFERSON CUNHA,JOÃO P. A. R. DA Spray deposition and chemical control of the coffee leaf-miner with different spray nozzles and auxiliary boom |
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GITIRANA NETO,JEFFERSON CUNHA,JOÃO P. A. R. DA |
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GITIRANA NETO,JEFFERSON |
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Spray deposition and chemical control of the coffee leaf-miner with different spray nozzles and auxiliary boom |
title_short |
Spray deposition and chemical control of the coffee leaf-miner with different spray nozzles and auxiliary boom |
title_full |
Spray deposition and chemical control of the coffee leaf-miner with different spray nozzles and auxiliary boom |
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Spray deposition and chemical control of the coffee leaf-miner with different spray nozzles and auxiliary boom |
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Spray deposition and chemical control of the coffee leaf-miner with different spray nozzles and auxiliary boom |
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spray deposition and chemical control of the coffee leaf-miner with different spray nozzles and auxiliary boom |
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ABSTRACT The coffee crop requires great spray ability to penetrate into the plant canopy during the application of pesticides. The aim of this study was to evaluate the spray deposition on leaves of coffee plants and the chemical control of the leaf miner provided by the application of different spray nozzles, with and without the use of an auxiliary boom. The deposition on the upper, middle and lower parts of the plants and the losses to the soil were evaluated using a tracer quantified by spectrophotometer. We also evaluated the chemical control of the leaf miner, counting the larvae, after the application of the insecticides cartap and fenpropathrin. The trial was carried out in a randomized block design, with four replications, in a factorial model (2×2+1): with and without the auxiliary boom, three spray nozzles (hollow cone – MAG 02, flat fan – AD 11002 and air induction hollow cone – TVI 8002) and a control. The use of the auxiliary boom increased the deposition in the lower part of the plants but decreased in the middle part, besides the increase in the runoff. The different nozzles do not provided differences in the deposition, showing the technical feasibility in the use of the hollow cone nozzles with coarse droplets and flat fan. All the chemical control decreased the leaf miner population, without differentiation. |
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Associação Brasileira de Engenharia Agrícola |
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2016 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000400656 |
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AT gitirananetojefferson spraydepositionandchemicalcontrolofthecoffeeleafminerwithdifferentspraynozzlesandauxiliaryboom AT cunhajoaoparda spraydepositionandchemicalcontrolofthecoffeeleafminerwithdifferentspraynozzlesandauxiliaryboom |
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