Potencialization of mesotrione efficiency in tank mixture with inhibiting of Photosystem II by distinct absorption pathways of crabgrass

Com objetivo de avaliar a potencialização da eficiência do mesotrione em mistura em tanque com herbicidas inibidores do Fotossistema II no controle de capim-colchão (Digitaria horizontalis), quatro experimentos foram conduzidos em estufas plásticas pertencentes à Escola Superior de Agronomia de Paraguaçu Paulista, município de Paraguaçu Paulista, Estado de São Paulo, utilizando-se um Latossolo de textura arenosa. Os delineamentos experimentais dos quatro experimentos foram o inteiramente casualizado, com 10 tratamentos e 5 repetições, em fatorial 3x3+1, considerando-se o contraste entre mesotrione (96 g ha-1) e  herbicidas inibidores do Fotossistema II (ametryn, 1500 g ha-1; metribuzin, 1440 g ha-1; diuron + hexazinone, 936+264 g ha-1 e atrazine, 2000 g ha-1), isolados e em mistura para três condições de absorção e uma testemunha sem aplicação. As condições de absorção constituíram-se pelo isolamento e/ou exposição parcial das plântulas alvo de D. horizontalis (3 a 6 folhas) em relação a deposição das pulverizações pelas modalidades: (a) plântulas protegidas com canudos plásticos em solo descoberto (absorção radicular); (b) plântulas desprotegidas em solo coberto com papel alumínio (absorção foliar); (c) plântulas e solo submetido à deposição dos herbicidas (absorção raízes + folhas) e (d) testemunha. Os maiores níveis de sinergismo obtidos no controle de D. horizontalis foram registrados para a absorção radicular e foliar+radicular da mistura mesotrione + atrazine, assim como da absorção foliar e foliar+radicular de mesotrione + diuron + hexazinone dos 3 aos 7 DAA (dias após aplicação) e de mesotrione + ametryn a partir dos 7 DAA, ambos caracterizados pela redução do tempo inicial do controle em atingir níveis ótimos (≥ 90%). Não foram constatados efeitos antagônicos para as misturas.With the objective of evaluating the potencialization efficiency of mesotrione in tank mixture with inhibitors Photosystem II in Digitaria horizontalis control, four experiments were conducted in plastic greenhouses belonging to Superior School of Agronomy of Paraguaçu Paulista County, São Paulo State, being used a Latosoil with sandy texture. The experimental design of four experiments was entirely randomized, with 10 treatments and 5 replications, in factorial scheme 3x3+1, being considered the contrast between mesotrione (96 g ha-1) and inhibitors of the Photosystem II herbicide (ametryn, 1500 g ha-1; metribuzin, 1440 g ha-1; diuron + hexazinone, 936+264 g ha-1 and atrazine, 2000 g ha-1) products, isolated and in tank mixture for three absorption conditions and a check. The absorption conditions were constituted by the isolation and/or partial exhibition of target seedling of D. horizontalis (3 to 6 leaves) in relation to deposition of pulverizations for the modalities: a) seedlings protected with plastic tubes in discovered soil (root absorption pathway); (b) unprotected seedlings in soil covered with aluminum sheet (leaf absorption pathway); (c) seedlings and soil submitted to deposition of the herbicides (absorption roots + leaves pathways) and (d) check. The largest synergism levels obtained for D. horizontalis control were registered to root absorption and leaf + root of the tank mixture with mesotrione + atrazine, as well as for leaf absorption and leaf + root of mesotrione + diuron + hexazinone from the 3 to the 7 DAA (days after application) and of mesotrione + ametryn starting from 7 DAA, both characterized by reduction of control initial time in reaching great levels (≥ 90%). Antagonistic effects were not verified for the tank mixtures

Resumos concluídos - Saúde Coletiva

Resumos concluídos - Saúde Coletiv

Resumos concluídos - Saúde Coletiva

Resumos concluídos - Saúde Coletiv

Neotropical freshwater fisheries : A dataset of occurrence and abundance of freshwater fishes in the Neotropics

The Neotropical region hosts 4225 freshwater fish species, ranking first among the world's most diverse regions for freshwater fishes. Our NEOTROPICAL FRESHWATER FISHES data set is the first to produce a large-scale Neotropical freshwater fish inventory, covering the entire Neotropical region from Mexico and the Caribbean in the north to the southern limits in Argentina, Paraguay, Chile, and Uruguay. We compiled 185,787 distribution records, with unique georeferenced coordinates, for the 4225 species, represented by occurrence and abundance data. The number of species for the most numerous orders are as follows: Characiformes (1289), Siluriformes (1384), Cichliformes (354), Cyprinodontiformes (245), and Gymnotiformes (135). The most recorded species was the characid Astyanax fasciatus (4696 records). We registered 116,802 distribution records for native species, compared to 1802 distribution records for nonnative species. The main aim of the NEOTROPICAL FRESHWATER FISHES data set was to make these occurrence and abundance data accessible for international researchers to develop ecological and macroecological studies, from local to regional scales, with focal fish species, families, or orders. We anticipate that the NEOTROPICAL FRESHWATER FISHES data set will be valuable for studies on a wide range of ecological processes, such as trophic cascades, fishery pressure, the effects of habitat loss and fragmentation, and the impacts of species invasion and climate change. There are no copyright restrictions on the data, and please cite this data paper when using the data in publications