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Santos,Durvalina M. M. dos; Pitelli,Robinson A.; Banzatto,David A.. |
Com o objetivo de verificar na planta aquática Spirodela punctata o efeito de diferentes concentrações (0,005; 0,05; 0,5 e 5 mgL-1 de ingrediente ativo) dos herbicidas butachlor, glyphosate e propanil sobre os teores de clorofila a, b e na razão clorofila a/b, foram conduzidos, por sete dias completos, bioensaios em sala climatizada. Determinou-se os teores de clorofilas através de leituras espectrofotométricas nas absorbâncias A645 e A663 nm. Os resultados mostraram que o butachlor diminuiu o teor de clorofila b, o glyphosate o teor de clorofila a, enquanto o propanil diminuiu os teores de clorofila a, b e a razão a/b, provocando a maior redução de pigmentos na espécie. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pigmentos; Butachlor; Propanil; Glyphosate; Planta aquática. |
Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83581999000200001 |
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Ronnachai Changsri; Namuco, Ofelia; Migo, Teodoro; Johnson, David. |
The efficacy of bispyribac sodium, fenoxaprop-p-ethyl + ethoxysulfuron, and propanil+butachlor were evaluated in greenhouse and field experiments, Weed Science, Crop and Environmental Sciences Division, IRRI in February - April 2013. The field plots had high weed density that had 4-6 leaves when the herbicides were applied at 15 days after land preparation. In the greenhouse experiment we grew Echinocloa crus-galli, Ludwigia octovalvis, Cyperus iria, weedy rice (Oryza sativa f. spontanea Acc. 105798 (THA)), and rice cultivars KDML105 and IR64 in pots. At 7 days after rice and weed germination, we sprayed herbicides to the above-mentioned species using a research track sprayer. The results showed that bispyribac sodium and fenoxaprop-p-ethyl+ethoxysulfuron... |
Tipo: PhysicalObject |
Palavras-chave: Rice; Weed; Herbicides; Greenhouse; Trails; Bispyribac sodium; Fenoxaprop-p-ethyl; Ethoxysulfuron; Propanil; Butachlor; Philippines; ข้าว; วัชพืช; สารป้องกันกำจัดวัชพืช; ความเป็นพิษ; การควบคุมวัชพืช; เรือนทดลอง. |
Ano: 2014 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5626 |
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