Avaliação da intoxicação de cultivares de cana-de-açúcar e I. grandifolia ao amicarbazone

Araldi, Rosilaine; Velini, Edivaldo Domingues; Girotto, Marcelo; Carbonari, Caio Antônio; Gomes, Giovanna Larissa Gimenes Cotrick; Trindade, Maria Lúcia Bueno

doi:10.1590/s0100-83582011000400017

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…The use of amicarbazone in the culture of sugarcane can present high selectivity so that more cultivars tolerant to this molecule have a lower absorption of the herbicide when compared to sensitive cultivars, which absorb more of it (Araldi et al, 2011).…”

Section: Greenhouse Experimentsmentioning

confidence: 99%

Selectivity of Herbicides Inhibitors of Photosystem II for Sugarcane Cultivars

et al. 2016

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-For the successful execution of chemical weed control in sugarcane crop, the selectivity of herbicides is a factor of great importance to maximize crop yield. Each cultivar may respond differently to the same herbicide in the same dose, and selectivity is not only determined by the visual presence or absence of phytotoxicity. Thus, the aim of this study was to evaluate the effects of herbicides amicarbazone, tebuthiuron, and diuron + hexazinona on the electron transport rate in photosystem II (ETR), along with the development and yield of sugarcane cultivars RB867515, CTC 4, CTC 9, and CTC 17 in greenhouse, and field conditions. Under greenhouse conditions ETR was assessed by a portable fluorometer, aa well as dry weight and phytotoxicity of the plants. In field evaluations, ETR, number of stems, yield and technological characteristics were assessed. In the greenhouse, the tebuthiuron herbicide caused the lowest reduction levels of ETR, phytotoxicity and dry weight of different sugarcane cultivars, followed by amicarbazone, and diuron + hexazinona. The effects of herbicides in ETR and phytotoxicity were more intense in greenhouse conditions than in field conditions for all cultivars. Herbicides tebuthiuron, amicarbazone and diuron + hexazinoa were selective for all evaluated cultivars, and reductions in the ETR after herbicide application did not affect the yield and technological characteristics of sugarcane cultivars.Keywords: amicarbazone, tebuthiuron, diuron, hexazinona, electron transport rate, Saccharum spp. Palavras-chave: amicarbazone, tebuthiuron, diuron, hexazinona, taxa de transporte de elétron, Saccharum spp. RESUMO -Para o sucesso na execução do controle químico de plantas daninhas na cultura da canade-açúcar, a seletividade dos herbicidas é um fator determinante e de grande importância para

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Section: Greenhouse Experimentsmentioning

confidence: 99%

Selectivity of Herbicides Inhibitors of Photosystem II for Sugarcane Cultivars

et al. 2016

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“…The cultivar of sugarcane experiments 2 and 3 was RB835054; experiments 4 and 5, RB867515; and experiment 1, RB855453. Araldi et al (2011) found differential susceptibility of sugarcane cultivars PO8862, SP803280 and RB835486 to herbicide amicarbazone, justified, possibly by differential absorption of the herbicide between cultivars. Moreover, regardless of genetic material, the mesotrione and mesotrione + atrazine treatments did not cause visual symptoms of phytotoxicity on sugarcane.…”

Section: Resultsmentioning

confidence: 86%

Chemical Control of Morning Glory Species in Sugarcane Harvested in the Dry and Semi-Wet Seasons1

Correia

2016

Planta daninha

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-The control of morning glory (Ipomoea spp. and Merremia aegyptia) was evaluated in five commercial sugarcane-production fields receiving applications of the herbicides sulfentrazone (0.9 kg ha . quamoclit, and I. triloba. The herbicides imazapic and mesotrione alone resulted in lower levels of control of M. aegyptia. Imazapic and the combination of mesotrione + (diuron + hexazinone) caused greater visible phytotoxicity to sugarcane than other herbicides applied during the dry and semi-wet seasons. However, the greatest loss of production was attributed to amicarbazone.Keywords: herbicide, Ipomoea spp., Merremia aegyptia, pre-emergence, post-emergence, Saccharum spp. RESUMO -Cinco experimentos foram instalados em áreas de produção comercial de cana-de-açúcar para estudar o controle de corda-de-viola (

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“…Araldi et al (2011) salientaram que as cultivares de uma mesma cultura, ao absorverem maior quantidade de herbicidas, podem apresentar menor tolerância.…”

Section: Introductionunclassified

Seletividade de herbicidas influenciada pelo estado nutricional da cana-de-açúcar

Silva

Azania

et al. 2013

RBHerbicidas

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Resumo -Para validar a hipótese de que a cana-de-açúcar adequadamente adubada é menos prejudicada pelos herbicidas, foram avaliadas características fitotécnicas e o perfil isoenzimático da α-esterase e peroxidase nas cultivares de cana-de-açúcar IACSP96-2042 e IACSP95-5094, submetidas a diferentes adubações de plantio e tratadas ou não com herbicidas. No campo foram realizados dois experimentos, um para cada cultivar, em vasos (43 L), utilizando-se do delineamento inteiramente casualizado com os tratamentos dispostos em fatorial 3 x 3 + 1, com quatro repetições. O primeiro fator constituiu-se por herbicidas: clomazone (1000 g ha -1 ), diuron (1440 g ha -1 ) + hexazinone (396 g ha -1 ) e sulfentrazone (800 g ha -1 ); e o segundo fator pela adubação: doses de NPK (ausência, 20-120-100 e 40-240-200 kg ha -1 ) e a testemunha pela ausência dos fertilizantes e herbicidas. Na aplicação dos herbicidas as plantas apresentavam altura de 20 cm e 3 a 4 folhas. No campo, foram avaliados os sintomas visuais de intoxicação, teor de clorofila total, altura, comprimento de folhas, número de perfilhos e massa fresca e seca das plantas. Em laboratório caracterizou-se o perfil isoenzimático da α-esterase e peroxidase antes da aplicação dos herbicidas e aos 58 dias após, por eletroforese em gel de acrilamida. IACSP96-2042 foi menos sensível aos herbicidas, sem prejuízo à massa fresca e seca, teor de clorofila total, altura, comprimento de folha e número de perfilhos. As isoformas da peroxidase diferiram em número e intensidade, e da α-esterase foram alteradas na intensidade das bandas. A IACSP95-5094 foi sensível aos efeitos da intoxicação dos herbicidas por prejudicar na altura, acúmulo de massa fresca e seca, particularmente no tratamento com diuron+hexazinone. Palavras-chaves: Saccharum spp., eletroforese, enzima, intoxicação Abstract -In order to validate the hypothesis that sugarcane crop adequately fertilized is less damaged by herbicides, phytotechnical characteristics and isoenzyme profiles of α-esterase and peroxides in IACSP96-2042 and IACSP95-5094 sugarcane genotypes were evaluated, submitted to different planting fertilizers and treated or no with herbicides. In field conditions, two experiments were conducted, one for each cultivar, in vases (43 L), by using the randomized 1 Recebido para publicação em 22/04/2013 e aceito em 23/08/2013. 2

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Avaliação da intoxicação de cultivares de cana-de-açúcar e I. grandifolia ao amicarbazone

Cited by 5 publications

References 13 publications

Selectivity of Herbicides Inhibitors of Photosystem II for Sugarcane Cultivars

Selectivity of Herbicides Inhibitors of Photosystem II for Sugarcane Cultivars

Chemical Control of Morning Glory Species in Sugarcane Harvested in the Dry and Semi-Wet Seasons1

Seletividade de herbicidas influenciada pelo estado nutricional da cana-de-açúcar

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