Weed Science
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Does the Glyphosate Treatment Interfere Negatively on RNA Integrity in Glyphosate-Resistant and -Sensitive Conyza bonariensis?
RESUMO: A buva (Conyza bonariensis (L.) Cronq.) está entre as plantas daninhas resistentes ao glifosato mais difíceis de serem manejadas em todo o mundo. Na ciência das plantas daninhas, abordagens moleculares, como o sequenciamento de RNA (RNA-Seq) e a reação da transcriptase reversa da polimerase em tempo real (RT-qPCR), têm sido empregadas para estu
Planta daninha. Publicado em: 04/11/2019
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2. Auxinic herbicides, mechanisms of action, and weed resistance: A look into recent plant science advances
Auxin governs dynamic cellular processes involved at several stages of plant growth and development. In this review, we discuss the mechanisms employed by auxin in light of recent scientific advances, with a focus on synthetic auxins as herbicides and synthetic auxin resistance mechanisms. Two auxin receptors were reported. The plasma membrane receptor ABP1
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-08
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3. Biologia e manejo da planta daninha Borreria densiflora DC. / Biology and management of the weed Borreria densiflora DC.
The weed vassourinha-de-botao (Borreria densiflora DC.) has been presenting increase in its infestation in areas cultivated with sugarcane and soybean, respectively in Maranhao and Goias states and north of Tocantins state, Brazil. Field observations have reported the control deficiency of this species, when it occurs in advanced growth stage. Thus, this res
Publicado em: 2008
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4. Micobiota fitopatogênica associada à planta invasora Tibouchina herbacea / Mycobiota of the invasive weed Tibouchina herbacea
Weed plant invasions, in natural as well as in anthropic modified environments, results in significant economical losses or ecosystem disequilibrium. Some ecosystems are more susceptible than others to biological invasions, once they have disharmonic fauna and flora (with empty ecological niches or niches occupied by low adapted species to the ecological fun
Publicado em: 2008
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5. Biological characteristics and herbicide susceptibility of five weed species of the Amaranthus genus. / Características biológicas e suscetibilidade a herbicidas de cinco espécies de plantas daninhas do gênero Amaranthus
Plant species classified in the Aramanthus genus are frequently found infesting brazilian agricultural areas, although there are few researches that evaluated the biological characteristics and the control of these species. Therefore, this work was conducted with the objective of analyzing the germination, the growth and the development, estimating the leaf
Publicado em: 2007
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6. Desempenho da cultura de milho (Zea mays L.) submetida a aplicação de herbicidas pós-emergentes, em diferentes situações de manejo. / Performance of the corn crop (Zea mays L.) submitted to application of post-emergence herbicides, in different management situations.
The application of post-emergence herbicides at corn crop is intense, exposing the crop to countless management situations in coincidence with the using of these agrochemicals that can result in damaging interactions to the crop. Therefore, this research was developed, with the objective of evaluating the possibility of interaction between these herbicides w
Publicado em: 2005
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7. "Tolerância de espécies de capim-colchão (Digitaria spp) a herbicidas na cultura de cana-de-açucar" / Tolerance of the crabgrass species (Digitaria spp) to herbicides in the sugarcane crop
It is known that the repetitive and successive use of the same or differents herbicides, but with same mechanism of action, impose a selection pressure on the weed population controled. The two main forms of weed population response resulted from the selection pressure of the herbicide is, weed species shifts, through selection of the tolerant species of wee
Publicado em: 2004
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8. Emergence periodicity and seeds bank in the tillage and no tillage systems and dose-response curves to glyphosate. / Fluxos de emergência e banco de sementes de plantas daninhas em sistemas de semeadura direta e convencional e curvas dose-resposta ao Glyphosate.
A pesquisa teve como objetivo verificar o fluxo de emergência das plantas daninhas e determinar o banco de sementes em condições de semeadura direta e convencional e verificar a eficácia do glyphosate em plantas daninhas de difícil controle. Para tanto, foi realizado no período de 2001 e 2002, um experimento de campo, onde de 15 em 15 dias, foi feito o
Publicado em: 2003
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9. Chloroplast-coded atrazine resistance in Solanum nigrum: psbA loci from susceptible and resistant biotypes are isogenic except for a single codon change.
The 32-kDa photosystem II protein of the chloroplast is thought to be a target molecule for the herbicide atrazine. The psbA gene coding for this protein was cloned from Solanum nigrum atrazine-susceptible ('S') and atrazine-resistant ('R') biotypes. The 'S' and 'R' genes are identical in nucleotide sequence except for an A to G transition, predicting a Ser
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10. An epidemiological application of Popper's method.
The strong logicodeductive method of science is applied in an investigation of the mortality of a large population of communications workers (338 306 white men) to explain the mortality deficits so often observed in occupational studies. A theory for the healthy worker effect is proposed, and its predictions are tested in comparisons of mortality curves fitt