Results: 7

Does doses and time of 2, 4-D application interfere in the physiology and wheat grains yield components?

The identification of the application stage and correct dose of 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide is important so that wheat is not harmed. In view of this, the objective of this study was to evaluate the effect of 2,4-D doses applied at different development stages of wheat crop. The expe...

Can a successional crop system associated with preemergent herbicides be a tool to control weeds?

The objective of this research was to evaluate weed control in a successional soybean-sorghum system by using preemergent herbicides. Two trials were conducted in soybean and two in sorghum, in different soil types (sandy in Rio Verde city and clayey in Montividiu city). All trials were established in a ...

Agronomic characterization of sunflower cultivars for animal feeding in tropical conditions

Biosci. j. (Online); 37 (), 2021
This study was developed to examine morpho-agronomic traits of 18 sunflower cultivars and identify superior cultivars in terms of grain yield, forage quality, or both, for animal feeding. Twenty-two morpho-agronomic traits related to plant development and architecture; earliness of maturity; grain yield ...

Arsenic exposure in northern Mexican women

Salud pública Méx; 62 (3), 2020
Abstract: Objective: To describe interindividual metabolism variations and sociodemographic characteristics associated to urinary arsenic, and to estimate the arsenic contamination in water from urinary total arsenic (TAs). Materials and methods: Women (n=1 028) from northern Mexico were interviewed ab...

Efeito do herbicida glifosato sobre o crescimento e produção de metabólitos secundários em Microcystis aeruginosa e Cylindrospermopsis raciborskii

ianobactérias, conhecidas por sua habilidade de sintetizar metabólitos com ação tóxica, podem se tornar dominantes em águas com altas concentrações de nitrogênio e fósforo. Embora a toxicidade do glifosato, o herbicida mais usado no mundo, em alguns organismos aquáticos seja conhecida, poucos ...

Efeito de diferentes herbicidas, doses e volume de calda na dessecação de milheto [Pennisetum Glaucum (L. Leek)]

Objetivou-se nesse trabalho avaliar a eficácia de diferentes herbicidas aplicados em pósemergência na de secação do milheto com diferentes doses e volumes de calda de aplicação. Para a dessecação do milheto foram utilizadas doses de 0, 25, 50 e 100% dos herbicidas glyphosate (1.440 g ha-1), em t...

Determinaçäo de resíduos de 2,4D em amostras vegetais
Residues determination of 2,4D in vegetables sample

Pesticidas; 6 (), 1996
Adaptou-se metodologia existente para determinaçao de resíduos do herbicida 2,4D (ácido 2,4 diclorofenoxiacético) em matrizes vegetais. A metodologia proposta foi testada em amostras de cana-de-açúcar, arroz, milho, soja e trigo. O 2,4D foi extraído com diclorometano em meio ácido e derivatizado ...