|
|
|
| Registros recuperados: 154 | |
|
| |
|
|
| Mwevura, H.; Othman, O.C.; Mhehe, G.L.. |
| Water samples were collected from Msimbazi and Kizinga rivers in Dar es Salaam and from the coastal marine environment receiving waters from these rivers during both the wet season and the dry season and analysed for various organochlorine pesticide residues using GC-ECD. The pesticides p,p’-DDE, p,p’-DDT, dieldrin and g-HCH were the only organochlorines detected at significantly greater concentrations above detection limits. There was a marked difference on the frequency of pesticide residue detection during the two seasons. All the wet season samples and 37.5% of the dry season samples contained p,p’-DDE at concentrations ranging from 0.05 to 0.45mg/l and 0.08 to 0.20mg/l respectively. p,p’-DDT was detected in 25% of the dry season samples at a... |
| Tipo: Journal Contribution |
Palavras-chave: Pesticides; Water pollution; Pesticide residues; Http://aims.fao.org/aos/agrovoc/c_16154. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/819 |
| |
|
| |
|
|
| Costagliola, M.; Seigneur, G.N.; Jurquiza, V.. |
| As a result of an agreement signed by the Municipal Government of Baradero Buenos Aires Province, Argentina and the INIDEP, the sanitary quality of the Baradero River waters was studied and fish safety assessed. Results of five field surveys carried out between 1993 and 1997 are studied. Organochlorine and organophosphorate pesticide residues, as well as traces of heavy metals were analyzed in 49 fish specimens and aerobic heterotrophic bacteria (AHB), total coliform bacteria (TC) and fecal coliform bacteria (FC) were counted out in 7 sampling stations placed on the coast and the riverbed. Alpha Hexachlorohexane, gamma Hexachlorohexane, beta Hexachlorohexane, Aldrin, Heptachlor epoxide, pp'DDE and Dieldrin were detected in fish tissues. The values of AHB... |
| Tipo: Journal Contribution |
Palavras-chave: Freshwater pollution; Pollution surveys; Chemical analysis; Water analysis; Microbiological analysis; Pesticides; Public health; Pathogenic bacteria; Pesticides; Public health; Water analysis; Microbiological analysis; Pathogenic bacteria; Http://aims.fao.org/aos/agrovoc/c_5739; Http://aims.fao.org/aos/agrovoc/c_6349; Http://aims.fao.org/aos/agrovoc/c_16064; Http://aims.fao.org/aos/agrovoc/c_25302; Http://aims.fao.org/aos/agrovoc/c_34317. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/2417 |
| |
|
| |
|
| |
|
| |
|
|
| CARVALHO,S.J.P.; ROSSI,C.V.S.; MELO,M.S.C.; CHRISTOFFOLETI,P.J.; KAGI,F.Y.. |
| ABSTRACT: The challenge of managing herbicide-resistant weeds is an agricultural reality in Brazil that shall not be neglected. In this sense, Ministério da Agricultura, Pecuária e Abastecimento (MAPA) published Act No. 45 on July 14, 2017, provides the inclusion of a code system on labels and leaflets of insecticides, fungicides and herbicides, in order to demonstrate the mode of action of the active ingredient present in the product. In case of mix formulations, both molecules must be discriminated, adopting the same “Herbicide Resistance Action Committee - HRAC” international reference code. The Act No. 45 facilitates the process to choose and adopt products by all those involved in the chain production. It also collaborates with the possible to... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Mode of action; Mixtures; Pesticides; Label; Leaflets. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100601 |
| |
|
|
| PASINI,R.A.; PAZINI,J.B.; GRÜTZMACHER,A.D.; RAKES,M.; ARMAS,F.S.. |
| ABSTRACT: The selectivity of eight herbicides registered for use in the wheat crop was assessed on the predators Chrysoperla externa and Eriopis connexa. Bioassays were conducted in the laboratory by exposing larvae, eggs, and pupae of these predators to dry residues of the herbicides 2,4-D amine, bentazon, glyphosate 1.200, glyphosate 1.440, ammonium glufosinate, iodosulfuron-methyl, metsulfuron-methyl, and pyrimidinedione. The herbicide ammonium glufosinate was classified as moderately harmful (class 3) to the larval stage of both predators. In the egg stage, only metsulfuron-methyl showed a reduction in larval hatching higher than 30% and was classified as slightly harmful (class 2) to eggs of E. connexa. The herbicide 2,4-D amine was classified as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pesticides; Biological control; Chemical control; Triticum aestivum. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100334 |
| |
|
|
| MORAES,H.M.F.; COSTA,J.O.; PEREIRA,G.A.M.; SOUZA,W.M.; SILVA,A.A.; PAIXÃO,G.P.. |
| ABSTRACT: Available information on physical compatibility and stability of pesticide mixtures is scarce and often divergent. This knowledge is of fundamental importance in the success of pest, disease, and weed control programs. Compatibility and stability of two glyphosate formulations (WG and SL) in a mixture with fluazinam + deltamethrin + trifloxystrobin/cyproconazole at four diluted water concentrations and different times were evaluated under laboratory conditions. The evaluations were performed at the following time intervals: immediately after mixing and 1, 5, 10, 30, 120, 900, and 1,440 minutes after the mixing of pesticides. Scores were assigned on a scale ranging from 1 to 5, where 1 meant immediate separation of compounds and 5 the perfect... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pesticides; Formulation; Spraying. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100179 |
| |
|
|
| PEREIRA,P.C.; BRUNETTI,I.A.; CASTRO,K.S.; CHIAROTTI,L.F.; SANTOS,B.E.; MORAES,J.C.; CRUZ,C.. |
| ABSTRACT: This study aimed to establish the mass cultivation of Wolffia brasiliensis under laboratory conditions, determine the sensitivity of reference substances (potassium dichromate, sodium chloride, and potassium chloride), and estimate the acute toxicity (LC50;7d) for the herbicide glyphosate, diquat, paraquat, imazapyr, 2,4-D, saflufenacil, imazamox, penoxsulam, metsulfuron-methyl, and atrazine. Three media were tested for culture establishment: Hoagland’s medium, 5.0 g L-1 NPK fertilizer (20-5-20), a mixture of Oxisol + organic substrate of decaying aquatic plant (2:1; v v-1). Sensitivity tests with reference substances and acute toxicity for herbicides were carried out after establishing the cultivation. The species W. brasiliensis presented an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macrophytes; Chemicals; Ecotoxicology; Reference substances; Pesticides. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100289 |
| |
|
|
| Matos,A.T.; Pinho,A.P.; Costa,L.M.; Morris,L.A.. |
| Plot-scale overland flow experiments were conducted to evaluate the efficiency of streamside management zones (SMZs) in retaining herbicides in runoff generated from silvicultural activities. Herbicide retention was evaluated for five different slopes (2, 5, 10, 15, and 20%), two cover conditions (undisturbed O horizon and raked surface), and two periods under contrasting soil moisture conditions (summer dry and winter wet season) and correlated to O horizon and site conditions. Picloram (highly soluble in water) and atrazine (moderately sorbed into soil particles) at concentrations in the range of 55 and 35 µg L-1 and kaolin clay (approximately 5 g L-1) were mixed with 13.000 liters of water and dispersed over the top of 5 x 10 m forested plots. Surface... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pollution control; Silviculture; Pesticides; Runoff. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000100014 |
| |
|
|
| Petacci,F.; Tavares,W.S.; Freitas,S.S.; Teles,A.M.; Serrão,J.E.; Zanuncio,J.C. |
| Asteraceae weeds are rich in chemicals that have biological and pharmaceutical activities. The aims of this work were to describe the phytochemistry and quantify the polyphenols in ethanol extracts from leaves of 12 species of Asteraceae weeds collected in Diamantina, Minas Gerais State, Brazil. The screening of Asteraceae extracts revealed the presence of tannins, steroids, triterpenes, anthocyanins, and flavonoids. The total phenolic content was high in extracts of Lychnophora ericoides (147.97 ± 2.66), Lepidaploa lilacina (141.11 ± 1.99), and Eremanthus elaeagnus (134.61 ± 7.81) and low in extracts of Lychnophora ramosissima (32.65 ± 0.70), and Lychnophora sp. (54.03 ± 0.73). Extracts of Asteraceae weeds from Diamantina could have potential for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Asteraceae; Campos rupestres; Diamantina; Pesticides; Phytochemistry; Polyphenols. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000100002 |
| |
|
| |
|
|
| REIS,F.C.; VICTÓRIA FILHO,R.; ANDRADE,M.T.; BARROSO,A.A.M.. |
| ABSTRACT: Sugarcane is one of the main agricultural cultivations of Brazil, and one of the crops in which herbicides are most applied. In the 2017/2018 season, the estimated sugarcane production was 694.54 million tons, with an estimated increase of 0.9% in yield for this season. In order to evaluate the use of herbicides in this crop in the São Paulo State during a five-year period, a survey was carried out with sugarcane farmers. The use of herbicides applied alone and in a formulated mixture, according to their mechanism of action, were evaluated from 2010 to 2014. Photosystem II inhibitor herbicides were the most used in this period and the total amount of herbicides of almost all mechanism of action increased from 2010 to 2014, except for photosystem... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Marketing; Mechanism of action; Research; Pesticides; Saccharum officinarum. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100262 |
| |
|
|
| MACEDO,D.F.; DOURADO JR.,S.M.; NUNES,E.S.; MARQUES,R.P.; MORETO,J.A.. |
| ABSTRACT: The aim of this work was to demonstrate a detailed study of the controlled release of the herbicide Tebuthiuron (TBH) encapsulated in microparticles of calcium alginate (Ca-ALG), to evaluate the phytotoxicity in different concentrations of herbicide (4, 6 and 8 g L-1), and their correlation with the depth of leaching using bioindicator plants. The Ca-ALG microparticles were prepared from the crosslinking of sodium alginate by Ca++ containing varied amounts of TBH supplied in calcium chloride (CaCl2) aqueous solution. The results showed that TBH herbicide, when encapsulated, leached to shallow depths relative to the conventional, non-encapsulated herbicide (which moved to a depth of 40-50 cm). The concentration of 4 g L-1 was the one that leached... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pesticides; Biodegradable polymer; Environmental impact; Encapsulation; Agriculture. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100266 |
| |
|
| |
|
| |
|
| |
|
|
| Wilson, Clevo; Tisdell, Clement A.. |
| Use of chemical inputs such as pesticides have increased agricultural production and productivity. However, negative externalities, too, have increased. The externalities include damage to the environment, agricultural land, fisheries, fauna and flora. Another major externality has been the unintentional destruction of beneficial predators of insects which has led to a virulence of many species of agricultural pests. Mortality and morbidity among agricultural workers, especially in developing countries from exposure to pesticides, are also common. The costs from these externalities are large and affect farmers’ returns. However, despite these high costs, farmers continue to use pesticides and in increasing quantities. In this paper, we examine this... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Pesticides; Agriculture; Environment; Human health; Sustainability; Hysteresis; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety. |
| Ano: 2000 |
URL: http://purl.umn.edu/48363 |
| |
| Registros recuperados: 154 | |
|
|
|
