Doses e horário de aplicação do diquat no controle de Eichhornia crassipes

Pitelli, Robinson Antônio; Bisigatto, A.T.; Kawaguchi, Ibene Takao; Pitelli, R.L.C.M.

doi:10.1590/s0100-83582011000200004

Cited by 13 publications

(18 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Sprouts of water hyacinth were used in the plantation, newly detached from the parent plant and containing 3-4 leaves. Before planting, the boxes were lined with a layer of 5 cm of dirt and sand in the proportion of 2:1, and then they were filled with water up to 1 cm of the surface, leaving a layer of 10 cm of water on the sediment; later on, the boxes were incubated for a period of 15 days, before the plantation of water hyacinth (Pitelli et al, 2011). In the application of herbicides, a research sprayer was used, kept at a constant pressure by CO 2 .…”

Section: Tests In Greenhousementioning

confidence: 99%

“…At 3, 7, 14, 21 and 28 days after application (DAA) of the herbicide, visual evaluations of the control percentage for E. crassipes were done, based on the visual estimate of the percentage of necrotic and dead plant material above the water blade (SBCPD, 2000;Pitelli et al, 2011). These estimates were always done by more than one person, and the average of the evaluators was used as a final value in each parcel (Pitelli et al, 2011).…”

Section: Evaluations Of the Efficacy Of The Herbicidementioning

confidence: 99%

“…These estimates were always done by more than one person, and the average of the evaluators was used as a final value in each parcel (Pitelli et al, 2011). At 50 DAA, there was regrowth in the plants treated with the herbicide.…”

Section: Evaluations Of the Efficacy Of The Herbicidementioning

confidence: 99%

“…The diquat herbicide has been studied as to the efficacy in aquatic plants and, because it has low translocation in plants, it is commonly applied with high spray volumes, associated to different droplets classes (Pitelli et al, 2008(Pitelli et al, , 2011Martins et al, 2011). However, there is demand for the reduction of costs, and one of the alternatives is to increase the operational efficiency of the pesticides spray through new techniques, such as the use of reduced volumes associated to the spectrum of droplets with a smaller potential of loss through drifting.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Application Volumes and Sizes of Droplets for the Application of Diquat Herbicide in the Control of Eichhornia crassipes

et al. 2016

View full text Add to dashboard Cite

The objective of this study was to evaluate the efficiency of application and the efficacy of control of water hyacinth (Eichhornia crassipes) with the use of the diquat herbicide done with two application volumes associated to three droplets classes. Three experiments were conducted; in the first, the application efficiency was evaluated; in the second, the control efficiency and; in the third, the droplet spectrum. They were conducted in a completely randomized design with five, four and six replicates, respectively. The treatments were arranged in a 2 x 3 factorial design, with two application volumes (100 and 200 L ha-1) and three droplets classes (fine, extremely coarse and ultra-coarse) to the first and second experiment and the third comprised two diquat concentrations in spray solution (2 and 4 g i.a. L-1) and three droplets classes (fine, extremely coarse and ultra-coarse). The application efficiency was determined by the coverage by droplets, spray deposition and active ingredient of the herbicide (diquat). The efficacy was measured by the control and the percentage of plants with regrowth at 50 days after application. The spectrum of droplets produced per each nozzle model used to obtain the droplets classes were analyzed. According to the parameters analyzed, using the droplets classes extremely thick and ultra thick can provide greater certainty in the application of diquat in the aquatic environment associated with the deposition of the active and sufficient coverage to control Eichhornia crassipes with both application volumes

show abstract

Section: Tests In Greenhousementioning

confidence: 99%

Section: Evaluations Of the Efficacy Of The Herbicidementioning

confidence: 99%

Section: Evaluations Of the Efficacy Of The Herbicidementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application Volumes and Sizes of Droplets for the Application of Diquat Herbicide in the Control of Eichhornia crassipes

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Para isso, é indispensável conhecer tanto os aspectos de distribuição da calda gerados pelos equipamentos como, também, as condições climáticas do ambiente que irão interagir com a dinâmica das gotas de pulverização, as quais são responsáveis pelo transporte do produto até o alvo. As condições climáticas variam conforme o local e no decorrer do dia e não podem ser controladas, ao contrário do modelo de ponta e o adjuvante utilizados, porém, essas condições do ambiente afetam diretamente a distribuição e a eficácia do produto aplicado (Ferreira et al, 1998;Pitelli et al, 2011).…”

Section: Introductionunclassified

Pontas hidráulicas, adjuvante e horários de aplicação de fomesafen no controle de picão-preto

Godinho

Júnior²,

Gontijo³

et al. 2015

RBHerbicidas

View full text Add to dashboard Cite

Resumo -A aplicação de defensivos agrícolas é afetada por diversos fatores, dentre eles, destacase o momento da aplicação, que pode variar de acordo com o alvo, o produto aplicado e equipamento utilizado. Objetivou-se avaliar pontas hidráulicas, adjuvante e horários de aplicação de fomesafen no controle de picão-preto. Os tratamentos foram arranjados em esquema fatorial 4x2x2, com o primeiro fator constituído de quatro pontas (API-11002; jato leque simples-JLS, AD/D-11002; jato leque duplo-JLD, AVI TWIN-11002; jato leque duplo com indução de ar-JLDIA, e APM-09502; jato leque simples de impacto-JLSIP). O segundo de dois horários de aplicação (3 e 16 horas) e o terceiro de duas misturas em tanque (com e sem adição de adjuvante espalhante adesivo não iônico). Os tratamentos foram avaliados sete, 14 e 21 dias após à aplicação, através do número de plantas vivas, altura das plantas, análise visual e aos 21 dias foi feita matéria seca da parte aérea. A aplicação às 16 horas proporcionou maior controle de todas as características avaliadas, a ponta JLSIP se destacou causando maior redução de matéria seca e de plantas vivas e a adição de adjuvante potencializou o controle da aplicação às 16 horas. O horário de aplicação influencia a ação do herbicida fomesafen, sendo que, sua aplicação às 16 horas proporciona maior controle de B. pilosa em relação à realizada às 3 horas. A ponta JLSIP aumenta a ação de fomesafen e a adição de adjuvante potencializa o efeito desta ponta e da aplicação realizada às 16 horas. Palavras-chaves: Bidens pilosa; condições climáticas; horário de aplicação; inibidor PROTOX Abstract -The application of pesticides is affected by several factors. Among them, the time of application stands out, which can vary according to the target, the applied product and equipment used. This study aimed to evaluate hydraulic nozzles, adjuvant and fomesafen application time in controlling beggar's tick. The treatments were arranged in a factorial 4x2x2, with the first factor consisting in four nozzles (API-11002; even (E) flat-fan, AD/D-11002; twin flat spray, AVI TWIN-11002; air induction (AI) twin flat spray-TQ, and APM-09502; Flood jet spray). The second with two application times (3 and 16 hours) and the third in two tank mixtures (with and without the addition of nonionic adhesive spreader adjuvant). The treatments were evaluated at 7, 14 and 21 days after the application, through the number of live plants, plant height, visual analysis and at 21 days the dry matter of the aerial part was made. The application at 16 hours provided better 1 Recebido para publicação em 07/12/2015 e aceito em 13/02/2016.

show abstract

Chemical Desiccation in the Preharvest of Cowpea: A Study of How the Time of Application Interferes in the Enzymatic and Physiological Aspects of Seedlings from Desiccated Plants

Coêlho,

Everthon da Silva Ribeiro,

Oliveira

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Chemical desiccation in the preharvest of grains and seeds is commonly used in production fields. Using herbicides for this purpose is a viable alternative to reduce beans' exposure to adverse crop conditions. Our objectives were to evaluate (1) the efficacy of herbicides for accelerated defoliation of cowpea, (2) the impact of herbicide application on antioxidant enzyme activity and protein and amino acid contents in seeds, and (3) the effects of different herbicide application schedules on the physiological aspects of seeds. In the first experiment, in addition to the control treatment (without herbicides), seven herbicides and two mixtures were applied at night: diquat, flumioxazin, diquat + flumioxazin, glufosinate ammonium, saflufenacil, carfentrazone, diquat + carfentrazone, atrazine, and glyphosate. Diquat and its mixtures showed greater efficacy in anticipating the harvest. Flumioxazin and diquat alone reduced amino acid content by 61.72 and 51.44%, respectively. The same trend was observed for total soluble proteins. The activity of antioxidant enzymes (CAT, POD, PPO) increased, indicating oxidative stress caused by diquat and flumioxazin. In the second experiment, we tested three application times (6 a.m., 12 p.m., 6 p.m.) with diquat, diquat + flumioxazin, and diquat + carfentrazone. The lowest damage to chlorophyll a was at 6 a.m.; other times reduced photosynthetic pigments and increased carotenoid content. Total soluble sugars decreased by 27.74% with nocturnal application of diquat + flumioxazin. Our data indicate that herbicide use for desiccation affects seed quality. These findings highlight the need for selecting appropriate herbicides and application times. Future research should explore long-term impacts on crop yield and quality.

show abstract

Doses e horário de aplicação do diquat no controle de Eichhornia crassipes

Cited by 13 publications

References 11 publications

Application Volumes and Sizes of Droplets for the Application of Diquat Herbicide in the Control of Eichhornia crassipes

Application Volumes and Sizes of Droplets for the Application of Diquat Herbicide in the Control of Eichhornia crassipes

Pontas hidráulicas, adjuvante e horários de aplicação de fomesafen no controle de picão-preto

Chemical Desiccation in the Preharvest of Cowpea: A Study of How the Time of Application Interferes in the Enzymatic and Physiological Aspects of Seedlings from Desiccated Plants

Contact Info

Product

Resources

About