8 documents found, page 1 of 1
Enlist volunteer corn affects the crop development and seed quality of Enlist s...
Mazon,Alcimar Spindola; Cechin,Joanei; Piasecki,Cristiano; Gazola,Juliano; Henckes,Jonas Rodrigo; Meneghello,Geri; Agostinetto,DirceuABSTRACT EnlistTM technology is a new trait on soybean and corn conferring tolerance to auxinic-type (2,4-D choline) and graminicides (aryloxyphenoxypropionates – FOPs) herbicides. However, the occurrence of volunteer corn tolerant to 2,4-D and FOPs can become a significant weed on soybean cropping systems, affecting the crop yield and reducing seed quality. This research aimed to evaluate herbicides to EnlistT...
Variation in the hectolitre weight of wheat grain for equipment and sample size
Martin,Thomas Newton; Cargnelutti Filho,Alberto; Deak,Evandro Ademir; Cechin,Joanei; Burg,Giovane Matias; Grün,EduardaABSTRACT: Hectolitre weight (HW) is the principal quantitative parameter used by receiving units as an indicator of the quality of wheat grain (Triticum aestivum L.). The moisture content and the equipment used can be considered important sources of variation to assess a batch, requiring correct sizing of the sample used to measure the HW. This research identified the variability between the equipment used to e...
Burial depths favor Italian ryegrass persistence in the soil seed bank
Cechin,Joanei; Schmitz,Maicon Fernando; Hencks,Jonas Rodrigo; Vargas,Andres Antonio Monge; Agostinetto,Dirceu; Vargas,LeandroABSTRACT: Italian ryegrass (Lolium multiflorum Lam.) is a weed broadly found in fields cultivated with wheat and barley crops. Seed inputs into the soil before harvesting winter crops increase seed bank, ensuring survival. This study evaluated the persistence of Italian ryegrass seeds subjected to burial depths over time. Experiments were carried out in the field for two years in randomized block experimental d...
Crop rotation and tillage system on the Italian ryegrass seed bank after long-t...
Guareschi,André; Cechin,Joanei; Bianchi,Mario Antonio; Maldaner,Ivan Carlos; Machado,Sergio Luiz de OliveiraABSTRACT: Italian ryegrass (Lolium multiflorum Lam.) is a troublesome weed widely found in temperate Brazilian fields with several herbicide-resistant populations. Soil seed bank is the main source of future infestations and can be strongly affected by agricultural practices, such as crop rotation and tillage system. Therefore, this study evaluated the long-term effects of different crop rotation and tillage sy...
May the crossing between diploid and tetraploid Italian ryegrass transfer glyph...
Schmitz,Maicon Fernando; Cechin,Joanei; Vargas,Andrés Antonio Monge; Henckes,Jonas Rodrigo; Vargas,Leandro; Agostinetto,DirceuABSTRACT Italian ryegrass (Lolium multiflorum Lam.) is a grass weed found in winter cereals, with several glyphosate-resistant diploid populations. Furthermore, the use of Italian ryegrass tetraploid genotypes creates an opportunity to increase the forage demand in replacement of diploid populations. The aim of this research was to evaluate the crossing capacity between glyphosate-resistant diploid and tetraplo...
Oxidative stress and differential antioxidant enzyme activity in glyphosate-res...
Piasecki,Cristiano; Carvalho,Ivan Ricardo; Cechin,Joanei; Goulart,Francisco A. P; Maia,Luciano Carlos da; Agostinetto,Dirceu; Caverzan,AndréiaABSTRACT Biochemical assays in a time-course were employed to evaluate stresses induced by glyphosate treatment in resistant and sensitive biotypes of Conyza bonariensis. Two experiments were conducted assessing glyphosate doses and time-course after treatment. The doses of glyphosate ranged from 0 to 11840 g ae·ha–1 and assessments performed until 552 h after glyphosate treatment (HAT). The objectives of this ...
Yield, germination and herbicide residue in seeds of preharvest desiccated wheat
Perboni,Lais Tessari; Agostinetto,Dirceu; Vargas,Leandro; Cechin,Joanei; Zandoná,Renan Ricardo; Farias,Humberto De SouzaAbstract: The goals of this study were to evaluate herbicide application rates at different timings for preharvest desiccation of wheat (Trial 1), as well as to evaluate the effect of the timing of herbicide desiccation at preharvest and harvest timing (Trial 2) on yield, germination, and herbicide residue in wheat seed. In Trial 1, treatments consisted of two application rates of glufosinate, glyphosate, paraq...
IN VITRO PROPAGATION OF Casearia sylvestris SWARTZ (SALICACEAE)
Paranhos,Juçara Terezinha; löbler,Lisiane; Cechin,Joanei; Fernandes,Tiéle Stüker; Fao,Elvis; Soriani,Hilda HildebrandABSTRACT In order to do an in vitro propagation of Casearia sylvestris, a tree native to Brazilian forests, studies of in vitro seed germination were performed and aseptic seedlings obtained were used as explant donors for micropropagation. Mature and immature seeds, stored for 10 days at 10 or 25°C were inoculated in medium containing 10% of MS salts and kept in the light (a 16-hour photoperiod) or continuous ...