scholarly journals HPPD-Inhibiting Herbicides Alone or in Tank-Mix with Atrazine in Elephant Grass

2017 ◽  
Vol 9 (11) ◽  
pp. 234
Author(s):  
Alexandre M. Brighenti ◽  
Juarez C. Machado ◽  
Francisco J. S. Ledo ◽  
Leonardo H. F. Calsavara ◽  
Yago V. Guerra Varotto
Keyword(s):  
Weed Control ◽  
Rio De Janeiro ◽  
Mineral Oil ◽  
Minas Gerais ◽  
Forage Yield ◽  
Elephant Grass ◽  
Application Rates ◽  
Minas Gerais State ◽  
Herbicide Treatments ◽  
Janeiro State

The interference imposed by weeds is one of the most important factors limiting elephant grass forage yield. Two experiments were carried out in 2015/2016 and 2017 to evaluate the selectivity and weed control of 4-hydroxyphenylpyruvate dioxygenase (HPPD)-inhibiting herbicides applied alone or in combination with atrazine in elephant grass. The treatments applied in the experiment conducted in Valença, Rio de Janeiro State, Brazil, were as follows: two rates of mesotrione (0.072 and 0.144 kg ha-1 + 0.5% v/v mineral oil - Assist®), two rates of tembotrione (0.075 and 0.100 kg ha-1 + 0.5% v/v mineral oil - Aureo®), atrazine + mesotrione (1.25 + 0.072 kg ha-1 + 0.5% v/v mineral oil - Assist®), atrazine + tembotrione (1.25 + 0.100 kg ha-1 + 0.5% v/v mineral oil - Aureo®), atrazine + mesotrione (1.25 + 0.072 kg ha-1), atrazine + tembotrione (1.25 + 0.100 kg ha-1) and two checks (weed-free check and weedy check). The same herbicide treatments and a check without application were applied in an experiment conducted in Coronel Pacheco, Minas Gerais State, Brazil. Two application rates of mesotrione with the addition of mineral oil or the tank mixture of atrazine plus mesotrione, with or without the addition of mineral oil, did not provide injuries capable to reduce elephant grass forage yield. Tembotrione was phytotoxic to elephant grass when applied with mineral oil. Atrazine plus tembotrione in a tank-mix, with or without mineral oil, were also phytotoxic to elephant grass. All treatments provided satisfactory weed control.

A review of Soaresia H. Soares, 1945, with the description of a new species from Serra da Mantiqueira, Brazil (Opiliones, Gonyleptidae, Pachylinae)

Zootaxa ◽  
2008 ◽  
Vol 1687 (1) ◽  
pp. 51 ◽  
Author(s):  
ADRIANO B. KURY
Keyword(s):  
New Species ◽  
Male Genitalia ◽  
Rio De Janeiro ◽  
Minas Gerais ◽  
Type Locality ◽  
Southeastern Brazil ◽  
Mountain Range ◽  
Minas Gerais State ◽  
A New Species ◽  
Janeiro State

Soaresia forficula sp. nov. is described from the Mantiqueira Mountain Range, Minas Gerais State, southeastern Brazil. The genus Soaresia H. Soares, 1945 previously included only Soaresia uncina H. Soares, 1945, hitherto recorded only from the type locality, Penedo, Rio de Janeiro State, in the same mountain range. A second record of S. uncina is given from a nearby locality, Serrinha do Alambari. The combined distribution of the species of Soaresia is restricted to elevations between 700 and 1300 m, in the Tropical & Subtropical Moist Broadleaf Forests biome. An emended diagnosis of the genus is given and complements are given to the description of S. uncina, including the first illustrations and description of the male genitalia.

Taxonomy and geographic variation of Formicivora serrana (Hellmayr, 1929) and Formicivora littoralis Gonzaga and Pacheco, 1990 (Aves: Passeriformes: Thamnophilidae)

Zootaxa ◽  
2011 ◽  
Vol 2742 (1) ◽  
pp. 1 ◽  
Author(s):  
DANIEL H. FIRME ◽  
MARCOS A. RAPOSO
Keyword(s):  
Rio De Janeiro ◽  
Minas Gerais ◽  
Biological Species ◽  
Phylogenetic Species ◽  
Species Status ◽  
Species Of Conservation Concern ◽  
Minas Gerais State ◽  
Conservation Concern ◽  
Threatened Habitat ◽  
Janeiro State

Formicivora serrana was described by Hellmayr in 1929 from specimens collected in Minas Gerais state, and subspecies F. s. interposita and F. s. littoralis by Gonzaga and Pacheco (1990) from specimens from Minas Gerais and Rio de Janeiro states and Rio de Janeiro state, respectively. According to the latter authors, interposita is intermediate both geographically and morphologically in relation to F. s. serrana and F. s. littoralis. Two years after its description, F. s. littoralis was elevated to species status (Collar et al. 1992) and it has subsequently been considered a species of conservation concern because of its restricted geographical range and threatened habitat. Formicivora s. interposita, however, was not elevated and is generally considered a subspecies of serrana. In this study we review the taxonomy of F. serrana, testing the validity of F. littoralis and proposing the best taxonomic treatment for F. s. interposita. The results of morphometric, vocal and plumage analyses show that F. s. interposita and F. littoralis lack diagnostic characters, and are therefore not valid phylogenetic species. Further, our results indicate that F. littoralis is not a valid biological species, but that it and interposita could be considered subspecies of F. serrana under this species concept. These results stress the need for detailed systematic studies in support of taxonomic decisions.

scholarly journals Astyanax intermedius Eigenmann, 1908 (Actinopterygii: Characiformes: Characidae): Distribution extension in eastern Brazil

Check List ◽  
2011 ◽  
Vol 7 (5) ◽  
pp. 583 ◽  
Author(s):  
Antônio Queiroz Lezama ◽  
Mauro Luís Triques ◽  
Federico Miranda de Queiroz
Keyword(s):  
River Basin ◽  
Rio De Janeiro ◽  
Minas Gerais ◽  
Eastern Brazil ◽  
Minas Gerais State ◽  
Coastal Rivers ◽  
Doce River ◽  
Janeiro State ◽  
Paraíba Do Sul River

Astyanax intermedius is known to occur at Paraíba do Sul River basin and coastal rivers of Rio de Janeiro state. A detailed study is presented in order to clearly assign the species to the Doce River basin, in Minas Gerais state. 

Dry Matter Yield and Nutritional Characteristics of Elephant-Grass Genotypes

2019 ◽  
pp. 1-8
Author(s):  
Rafael Souza Freitas ◽  
Rogério Figueiredo Daher ◽  
Ana Kesia Faria Vidal ◽  
Wanessa Francesconi Stida ◽  
Bruna Rafaela Da Silva Menezes ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Nutritional Quality ◽  
Rio De Janeiro ◽  
Nutritional Value ◽  
Elephant Grass ◽  
Productive Performance ◽  
Nutritional Characteristics ◽  
Minas Gerais State ◽  
Janeiro State ◽  
Selection Of

In the elephant-grass germplasm, there are genotypes that show a large genetic variability differentiated by morphological, reproductive, agronomic and biochemical characteristics. As such, there is a selection of new and more adapted elephant-grass genotypes, with greater productivity and nutritional quality, which can cause an increase in the forage offer, especially during the dry season. Thus, this work aimed at evaluating, throughout two years, the productive performance and nutritional value of 53 elephant-grass genotypes to produce forage in the edaphoclimatic conditions in Campos dos Goytacazes city, Rio de Janeiro State, Brazil. The experiment was composed of 53 elephant-grass accessions from the Banco de Germoplasma da Embrapa Gado de Leite (Germplasm Bank of Embrapa Gado de Leite), located in Coronel Pacheco city, Minas Gerais state, Brazil. It was applied the randomized complete block experimental design with 53 accessions two replications. Cuttings were performed every two months, throughout two years, totaling ten cuttings. The morpho-agronomic and bromatological characteristics were assessed, and the statistical analyses were carried out applying the Computational Applicative in Genetic and Statistics, Genes. Results indicated that there is a wide genetic variability among the elephant-grass genotypes concerning the characteristics under study. The Mineiro, Guaçu IZ-2 and Acesso 91 – EMBRAPA genotypes were those that showed to be superior to all traits evaluated simultaneously. They proved to be the most productive and with higher nutritional quality. Therefore, they are the most indicated to produce forage in the edaphoclimatic conditions of Campos dos Goytacazes city, Rio de Janeiro State.

Effects of Weed Control in Established Alfalfa (Medicago sativa) on Forage Yield and Quality

Weed Science ◽  
1987 ◽  
Vol 35 (4) ◽  
pp. 564-567 ◽  
Author(s):  
Dennis R. Cosgrove ◽  
Michael Barrett
Keyword(s):  
Medicago Sativa ◽  
Weed Control ◽  
Stand Density ◽  
Forage Yield ◽  
Control Measures ◽  
Acid Detergent Fiber ◽  
Yield And Quality ◽  
Herbicide Treatments ◽  
Forage Yields

The effects of weed control measures in established alfalfa (Medicago sativaL.) on forage yield and quality were investigated at three sites with varying alfalfa densities and weed populations. Herbicide treatments were 0.56 and 1.12 kg/ha metribuzin [4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one] applied in fall or spring, respectively, 1.68 kg/ha pronamide [3,5-dichloro (N-1,1-dimethyl-2-propynyl)benzamide] applied in fall, and combinations of these treatments. First-harvest forage yields (weeds plus alfalfa) were either reduced or unchanged by herbicide treatments. Total forage yield was not altered by the herbicide treatments, but first-harvest and total alfalfa yield as well as first-harvest forage protein content were increased by several treatments, depending on stand density and weed pressure. Little effect was observed on in vitro digestible dry matter or acid detergent fiber content.

The Neotropical sharpshooter genus Ruppeliana Young (Insecta: Hemiptera: Cicadellidae): four new species, key to males, and new synonyms

Zootaxa ◽  
2017 ◽  
Vol 4329 (5) ◽  
pp. 436
Author(s):  
RODNEY R. CAVICHIOLI ◽  
RACHEL A. CARVALHO ◽  
GABRIEL MEJDALANI
Keyword(s):  
New Species ◽  
New Taxa ◽  
Male Genitalia ◽  
Rio De Janeiro ◽  
Color Pattern ◽  
The Other ◽  
Key To Species ◽  
New Synonyms ◽  
Minas Gerais State ◽  
Janeiro State

Four new Brazilian species of Ruppeliana are described and illustrated: R. barbarensis sp. nov., R. grossii sp. nov., R. longiphallus sp. nov., and R. serrana sp. nov., the first from Minas Gerais State and the other three from Rio de Janeiro State. The new taxa can be easily distinguished from other Ruppeliana species by their color pattern and male genitalia morphology. Ruppeliana coronulifera (Stål, 1862) and R. taschenbergi (Berg, 1899) are synonymized with R. signiceps (Stål, 1862). Additionally, a diagnosis of the genus and a key to species are provided. 

New species and new report of Hyalella S. I. Smith, 1874 (Crustacea: Amphipoda: Dogielinotidae) from Minas Gerais state, Southeastern Brazil

Zootaxa ◽  
2012 ◽  
Vol 3350 (1) ◽  
pp. 58 ◽  
Author(s):  
RAFAELA BASTOS-PEREIRA ◽  
ALESSANDRA ANGÉLICA DE PÁDUA BUENO
Keyword(s):  
New Species ◽  
Species Identification ◽  
Posterior Margin ◽  
Minas Gerais ◽  
The State ◽  
Southeastern Brazil ◽  
Diverse Group ◽  
Minas Gerais State ◽  
A New Species ◽  
Janeiro State

At present, 13 species of Hyalella are recorded from Brazilian hydrographic basins. A new species of the genus was foundin the municipality of Arcos, Minas Gerais state and it is described here. Curved seta on inner ramus of male uropod 1,posterior margin of gnathopod 2 propodus shorter than palm, telson longer than wide are some of the diagnostic charatctersof this new species. The articles of maxillipod palp and propodus of gnathopod 2 are elongated as observed in H.longistila,but the new species differs from it because of the curved seta on uropod 1. Despite being large and diverse group, Hyalellais represented only by two species in the state of Minas Gerais (Southeastern Brazil), H. warminig and H. gracilicornis.The distribution of H. longistila, previously recorded in Rio de Janeiro state, was extended to Minas Gerais state. Thiswork, therefore, contributes for the knowledge of Amphipoda fauna from Brazil, describing a new species and providing a key to the species identification. From this work, the number of Hyalella species found in Brazil to 14.

Two new syncephalous species of Eremanthus (Asteraceae: Vernonieae) from southeastern Brazil

Phytotaxa ◽  
2016 ◽  
Vol 243 (2) ◽  
pp. 128 ◽  
Author(s):  
Benoit Loeuille ◽  
José Rubens Pirani
Keyword(s):  
New Species ◽  
Rio De Janeiro ◽  
Southeastern Brazil ◽  
Campos Rupestres ◽  
Serra Do Mar ◽  
Northeastern Part ◽  
Paulo State ◽  
Minas Gerais State ◽  
Two New Species ◽  
Janeiro State

Eremanthus praetermissus and E. ovatifolius, two new species from Brazil, are here described and illustrated. Eremanthus praetermissus is endemic to Serra do Mar, in the northeastern part of São Paulo state and the southern part of Rio de Janeiro state; it is characterized by hemispherical, brown syncephalia, heads connate for 1/3 to 2/5 of their length, with 3–4 florets per head and brown phyllaries with purple apices. Eremanthus ovatifolius is endemic to campos rupestres of Pico da Aliança, in the eastern part of Minas Gerais state, and is characterized by ovate leaves, hemispherical syncephalia, heads connate for 1/4 to 1/2 of their length and 3–4 florets per head. The affinities of these species are discussed. A key to all species of Eremanthus is provided.

Effect of row width on herbicide and cultivation requirements in row crops

1992 ◽  
Vol 7 (4) ◽  
pp. 161-167 ◽  
Author(s):  
Frank Forcella ◽  
Mark E. Westgate ◽  
Dennis D. Warnes
Keyword(s):  
Weed Control ◽  
Crop Yield ◽  
Crop Yields ◽  
Row Crops ◽  
Low Input ◽  
Application Rates ◽  
Row Width ◽  
Herbicide Treatments ◽  
Herbicide Use

AbstractCrops grown in narrow rows (NR, 0.25 to 0.38 m) shade weed seedlings more than do those grown in traditional wide rows (WR, 0.76 m). NR crops may require less herbicide and interrow cultivation than WR crops for equally effective weed control. This hypothesis was tested by comparing weed control and crop yield in NR and WR crops when the following percentages of recommended application rates (RAR) of standard herbicides were applied: soybean, 0, 50 and 100%; sunflower, 0, 25, 50, and 100%; and corn, 0, 33, and 100% in three separate sets of experiments conducted over 2, 3, and 4 years, respectively. In all treatments with 100% RAR, excellent weed control prevented reductions in crop yield. When only 25 to 50% RAR was applied, weed control was consistently high in NR (82 to 99% control), but variable in WR (42 to 99% control). Weed control and crop yields typically were lowest in NR without herbicides. Interrow cultivation controlled 0 to 81% of weeds in WR crops. In reduced herbicide treatments (25 to 50% RAR), yields of NR soybean and sunflower typically were about equal to those in WR with 100% RAR, but NR corn yields were about 10% less. Considering the reduced herbicide use and lower weed control costs, planting corn, soybean, and sunflower in narrow rows may represent a practical form of low-input production of these important crops.

Sign in / Sign up

Export Citation Format

Share Document