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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Eficiência de herbicidas para a cultura do feijão-caupi (Vigna unguiculata (L.) Walp.) / Efficiency of weedkillers for the cultivation of caupi beans

Silva, Kaliane de Souza 16 February 2012 (has links)
Made available in DSpace on 2016-08-12T19:15:21Z (GMT). No. of bitstreams: 1 KalianeSS_DISSERT.pdf: 2580771 bytes, checksum: e05df91d2e689c26bd47109c48a1efe5 (MD5) Previous issue date: 2012-02-16 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / In order to evaluate the efficiency of weedkillers in the culture of caupi beans (Vignaunguiculata (L.)Walp.), an experiment was conducted in split plots distributed in randomized complete block design with four replications and the plots were evaluated nine weedkillers/mixtures (S-metolachlor,bentazon + imazamox, S-metolachlor + bentazon + imazamox, imazamox + fluazifop-p-butyl, imazethapyr + fluazifop-p-butyl, bentazon + fluazifop-p-butyl, bentazon+ imazamox + fluazifop-p- butyl,lactofen + fluazifop-p-butyl, fluazifop-p-butyl) and a control without weedkiller, while the sub-plots, two treatments were evaluated: with weeding and no hoeing, to determine the selectivity and effectiveness of weedkiller, respectively. At 21, 28 and 45 days after planting (DAP) were evaluated visually in the culture of intoxication and weed control. At 45 DAP, was carried out assessment of dry mass of weeds. At harvest, when plants of caupi had 80% of dry pods were evaluated the number of pods per plant, hundred grain weight and yield of caupi as a function of the strategies for weed management. Plants treated with the mixture of weedkillerslactofen + fluazifop-p-butyl suffered severe intoxication, later recovering with delayed flowering and harvest in eight days. The main species of infesting plants were Cleome affinisDC., Trianthemaportulacastrum L., Amaranthusspinosus L., Commelinabenghalensis L. and Digitariabicornis Lam., all of them were efficiently controlled by the weedkillers S metolachlor + bentazon + imazamox and lactofen + fluazifop-p-butyl,while S-metolachlor, bentazon + fluazifop-p-butyl and the imazamox + fluazifop-p-butyl did not exert efficient control over Cleome affinis, Amaranthusspinosus and Trianthemaportulacastrum, respectively. The interference of species Amaranthusspinosus caused reduction in the productivity of treated plots bentazon + fluazifop-p-butyl, similarly to the control without hoeing. Despite the severe intoxication, weedkillerslactofen + fluazifop-p-butyl provided higher yield when compared to other treatments, because it reduces the intense vegetative growth provided by high rainfall during the experimental period. It was concluded that the weedkillers S-metolachlor, bentazon + imazamox, S-metolachlor + bentazon + imazamox, imazamox + fluazifop-p-butyl, imazethapyr + fluazifop-p-butyl, bentazon + fluazifop-p-butyl, bentazon + imazamox + fluazifop-p-butyl,fluazifop-p-butyl were selective for the culture and that the effectiveness of these depends on infesting species in the area / Com o objetivo de avaliar a eficiência de herbicidas para a cultura do feijão-caupi (Vigna unguiculata (L.) Walp.), conduziu-se um experimento no esquema de parcelas subdivididas distribuídas no delineamento experimental de blocos casualizados, com quatro repetições, sendo que nas parcelas foram avaliados nove herbicidas/misturas (S-metolachlor,bentazon+imazamox,S-metolachlor + bentazon + imazamox,imazamox + fluazifop-p-butyl,imazethapyr + fluazifop-p-butyl,bentazon + fluazifop-p-butyl,bentazon + imazamox + fluazifop-p-butyl,lactofen + fluazifop-p-butyl,fluazifop-p-butyl) e uma testemunha sem herbicidas, enquanto nas subparcelas foram avaliados dois tratamentos: com capinas e sem capinas, para determinar a seletividade e a eficácia dos herbicidas, respectivamente.Aos 21, 28 e 45 dias após o plantio (DAP) foram realizadas avaliações visuais de intoxicação na cultura e de controle de plantas daninhas. Aos 45 DAP, foi realizada avaliação de massa seca de plantas daninhas. Por ocasião da colheita, quando as plantas do feijão-caupi estavam com 80% das vagens secas, foramavaliados o número de vagens por planta, peso de cem grãos e a produtividade do feijão-caupi em função das estratégias de manejo de plantas daninhas.As plantas tratadas com a mistura dos herbicidas lactofen + fluazifop-p-butyl sofreram severa intoxicação, se recuperando posteriormente, com retardo do florescimento e colheita em oito dias.As principais espécies de plantas infestantes foramCleome affinis DC., Trianthema portulacastrum L., Amaranthus spinosus L., Commelinabenghalensis L. eDigitaria bicornisLam,sendo todas controladas com eficiência pelos herbicidasS-metolachlor + bentazon+imazamox e lactofen + fluazifop-p-butyl,enquanto que o S-metolachlor, o bentazon + fluazifop-p-butyl e o imazamox + fluazifop-p-butyl não exerceram controle eficiente sobre Cleome affinis, Amaranthus spinosus eTrianthema portulacastrum, respectivamente. A interferência da espécie Amaranthusspinosus ocasionouredução na produtividade da parcela tratada combentazon + fluazifop-p-butyl, de modo semelhante à testemunha sem capinas. Apesar da severa intoxicação causada, os herbicidas lactofen + fluazifop-p-butyl proporcionaram maior produtividade em relação aos demais tratamentos, por reduzir o intenso crescimento vegetativo proporcionado pelo elevado índice pluviométrico no período experimental. Concluiu-se queos herbicidas S-metolachlor, bentazon + imazamox, S-metolachlor + bentazon + imazamox, imazamox + fluazifop-p-butyl, imazethapyr + fluazifop-p-butyl, bentazon + fluazifop-p-butyl, bentazon + imazamox + fluazifop-p-butyl e fluazifop-p-butyl foram seletivos para a cultura e que a eficácia dos herbicidas depende da comunidadede plantas infestantes da área
2

Eficiência de herbicidas para a cultura do feijão-caupi (Vigna unguiculata (L.) Walp.) / Efficiency of weedkillers for the cultivation of caupi beans

Silva, Kaliane de Souza 16 February 2012 (has links)
Made available in DSpace on 2016-08-12T19:18:43Z (GMT). No. of bitstreams: 1 KalianeSS_DISSERT.pdf: 2580771 bytes, checksum: e05df91d2e689c26bd47109c48a1efe5 (MD5) Previous issue date: 2012-02-16 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / In order to evaluate the efficiency of weedkillers in the culture of caupi beans (Vignaunguiculata (L.)Walp.), an experiment was conducted in split plots distributed in randomized complete block design with four replications and the plots were evaluated nine weedkillers/mixtures (S-metolachlor,bentazon + imazamox, S-metolachlor + bentazon + imazamox, imazamox + fluazifop-p-butyl, imazethapyr + fluazifop-p-butyl, bentazon + fluazifop-p-butyl, bentazon+ imazamox + fluazifop-p- butyl,lactofen + fluazifop-p-butyl, fluazifop-p-butyl) and a control without weedkiller, while the sub-plots, two treatments were evaluated: with weeding and no hoeing, to determine the selectivity and effectiveness of weedkiller, respectively. At 21, 28 and 45 days after planting (DAP) were evaluated visually in the culture of intoxication and weed control. At 45 DAP, was carried out assessment of dry mass of weeds. At harvest, when plants of caupi had 80% of dry pods were evaluated the number of pods per plant, hundred grain weight and yield of caupi as a function of the strategies for weed management. Plants treated with the mixture of weedkillerslactofen + fluazifop-p-butyl suffered severe intoxication, later recovering with delayed flowering and harvest in eight days. The main species of infesting plants were Cleome affinisDC., Trianthemaportulacastrum L., Amaranthusspinosus L., Commelinabenghalensis L. and Digitariabicornis Lam., all of them were efficiently controlled by the weedkillers S metolachlor + bentazon + imazamox and lactofen + fluazifop-p-butyl,while S-metolachlor, bentazon + fluazifop-p-butyl and the imazamox + fluazifop-p-butyl did not exert efficient control over Cleome affinis, Amaranthusspinosus and Trianthemaportulacastrum, respectively. The interference of species Amaranthusspinosus caused reduction in the productivity of treated plots bentazon + fluazifop-p-butyl, similarly to the control without hoeing. Despite the severe intoxication, weedkillerslactofen + fluazifop-p-butyl provided higher yield when compared to other treatments, because it reduces the intense vegetative growth provided by high rainfall during the experimental period. It was concluded that the weedkillers S-metolachlor, bentazon + imazamox, S-metolachlor + bentazon + imazamox, imazamox + fluazifop-p-butyl, imazethapyr + fluazifop-p-butyl, bentazon + fluazifop-p-butyl, bentazon + imazamox + fluazifop-p-butyl,fluazifop-p-butyl were selective for the culture and that the effectiveness of these depends on infesting species in the area / Com o objetivo de avaliar a eficiência de herbicidas para a cultura do feijão-caupi (Vigna unguiculata (L.) Walp.), conduziu-se um experimento no esquema de parcelas subdivididas distribuídas no delineamento experimental de blocos casualizados, com quatro repetições, sendo que nas parcelas foram avaliados nove herbicidas/misturas (S-metolachlor,bentazon+imazamox,S-metolachlor + bentazon + imazamox,imazamox + fluazifop-p-butyl,imazethapyr + fluazifop-p-butyl,bentazon + fluazifop-p-butyl,bentazon + imazamox + fluazifop-p-butyl,lactofen + fluazifop-p-butyl,fluazifop-p-butyl) e uma testemunha sem herbicidas, enquanto nas subparcelas foram avaliados dois tratamentos: com capinas e sem capinas, para determinar a seletividade e a eficácia dos herbicidas, respectivamente.Aos 21, 28 e 45 dias após o plantio (DAP) foram realizadas avaliações visuais de intoxicação na cultura e de controle de plantas daninhas. Aos 45 DAP, foi realizada avaliação de massa seca de plantas daninhas. Por ocasião da colheita, quando as plantas do feijão-caupi estavam com 80% das vagens secas, foramavaliados o número de vagens por planta, peso de cem grãos e a produtividade do feijão-caupi em função das estratégias de manejo de plantas daninhas.As plantas tratadas com a mistura dos herbicidas lactofen + fluazifop-p-butyl sofreram severa intoxicação, se recuperando posteriormente, com retardo do florescimento e colheita em oito dias.As principais espécies de plantas infestantes foramCleome affinis DC., Trianthema portulacastrum L., Amaranthus spinosus L., Commelinabenghalensis L. eDigitaria bicornisLam,sendo todas controladas com eficiência pelos herbicidasS-metolachlor + bentazon+imazamox e lactofen + fluazifop-p-butyl,enquanto que o S-metolachlor, o bentazon + fluazifop-p-butyl e o imazamox + fluazifop-p-butyl não exerceram controle eficiente sobre Cleome affinis, Amaranthus spinosus eTrianthema portulacastrum, respectivamente. A interferência da espécie Amaranthusspinosus ocasionouredução na produtividade da parcela tratada combentazon + fluazifop-p-butyl, de modo semelhante à testemunha sem capinas. Apesar da severa intoxicação causada, os herbicidas lactofen + fluazifop-p-butyl proporcionaram maior produtividade em relação aos demais tratamentos, por reduzir o intenso crescimento vegetativo proporcionado pelo elevado índice pluviométrico no período experimental. Concluiu-se queos herbicidas S-metolachlor, bentazon + imazamox, S-metolachlor + bentazon + imazamox, imazamox + fluazifop-p-butyl, imazethapyr + fluazifop-p-butyl, bentazon + fluazifop-p-butyl, bentazon + imazamox + fluazifop-p-butyl e fluazifop-p-butyl foram seletivos para a cultura e que a eficácia dos herbicidas depende da comunidadede plantas infestantes da área

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