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selectivity of preemergence herbicide treatments for cotton crop
Barroso, Alberto Leão de Lemos; Dan, Hugo Almeida; Oliveira Junior, Rubem Silvério de; Constantin, Jamil; Dan, Lilian Gomes de MoraesThe use of preemergence herbicides in cotton crop is one of the main tools in weed control. However, little is known about the effects of different herbicide tank mixtures on this crop. Therefore, this work was aimed at evaluating the selectivity of herbicides applied isolated or in mixtures to cotton at preemergence. Herbicide treatments included alachlor, s-metolachlor, diuron, prometryn, trifluralin, oxyfluo...
Qualidade fisiológica das sementes de soja rr em resposta ao uso de diferentes ...
Albrecht, Leandro Paiola; Alonso, Diego Gonçalves; Constantin, Jamil; Oliveira Jr., Rubem Silvério de; Braccini, Alessandro de Lucca eO objetivo do presente trabalho foi avaliar a qualidade fisiológica das sementes da soja RR, sob efeito do manejo com glyphosate em pós-emergência, aplicado em misturas ou isolado, de forma sequencial. O trabalho foi constituído de três experimentos com distintos tratamentos, instalados no ano agrícola 2006/2007, no município de Floraí. O delineamento experimental utilizado foi o de blocos ao acaso, com doze tr...
Contrasts among origins of corn hybrids in relation to their susceptibility to ...
Cavalieri, Sidnei Douglas; Oliveira Junior, Rubem Silvério de; Constantin, Jamil; Biffe, Denis Fernando; Alonso, Diego GonçalvesHerbicide selectivity is the basis for successfull weed chemical control in agricultural production, as it is considered as a measurement of the difeerential response of different plant species to a certain herbicide. The objective of this work was to evaluate the effect of the origin of corn hybrid in relation to its susceptibility to the herbicides nicosulfuron and isoxaflutole. The research was conducted in ...
Control of different species of Sida spp. with sequential applications of flumi...
Constantin, Jamil; Junior, Rubem Silvério de Oliveira; Kajihara, Luciano Hiroyuki; Arantes, João Guilherme Zanetti de; Cavalieri, Sidnei DouglasDifferent species of genus Sida are important common weeds. They are considered extensively disseminated species and are hard to control. This trial aimed to evaluate the efficacy of sequential applications of sublethal rates of flumicloracpentil to control four species of Sida sp. of frequent occurrence in the north and northewest Paraná state, in comparison with a single application of the herbicide, both at ...
Sequential application of flumicloracpentil for Euphorbia heterophylla control ...
Oliveira Júnior, Rubem Silverio de; Constantin, Jamil; Toledo, Roberto; Kajihara, Luciano Hiroyuki; Stasieviski, ÂngeloWild poinsettia (Euphorbia heterophylla) is one the most important weeds in soybean fields in the state of Paraná, not only for its dissemination, but also due to its natural difficulty of controlling features by herbicides and to occurrence of resistant biotypes. Facing those problems, an evaluation of the field and greenhouse trials was carried out in order to check the efficacy of postemergence sequential ap...
Effect of burndown management on desiccation speed, initial weed emergence, dev...
Jaremtchuk, Carla Cristina; Constantin, Jamil; Oliveira Júnior, Rubem Silvério de; Biffe, Denis Fernando; Alonso, Diego GonçalvesIn no-tillage systems, burndown is one of the most important steps to achieve maximum initial crop growth and minimize weed interference during early stages of the crop cycle. The purpose of this work was to evaluate the effect of different burndown systems before no-tillage sowing of soybean. A field experiment was carried out in Iguaraçu, Paraná State, during the 2004/2005 growth season. Under field condition...
Leaching potential and degradation of diuron in two soils of contrasting textur...
Inoue, Miriam Hiroko; Oliveira Júnior, Rubem Silverio de; Constantin, Jamil; Alonso, Diego Gonçalves; Santana, Diogo Carneiro deThis research was aimed at studying the leaching of diuron in soil columns, as well as the effect of different methods of reduction of microbial activity on diuron degradation in samples of a sandy loam soil (LVd) and a clay soil (LRd). To measure the downward movement of diuron (0; 1.6 and 3.2 kg ha-1), water layers of 0, 20 40, 60 and 80 mm were applied. For degradation studies, the methods used to restrict w...