Controle de azevém (Lolium multiflorum L.), e gorga (Spergula arvensis L.) e seletividade de herbicidas as culturas de trigo, cevada e centeio

Velloso, Jeanny Alice; Dal'Piaz, R.

doi:10.1590/s0100-83581982000200002

Cited by 3 publications

(2 citation statements)

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“…Trezzi et al (2007) observed the antagonistic effect of mixing clonadifoppropargyl + 2,4-D (20 670 g ha -1 ) in control of ryegrass (Lolium mutiflorum) regarding the application of the graminicide isolated, as well as higher rates of control with the mixture as the clonadifop-propargyl concentration was increased. As to Velloso & Dal'piaz (1982), they reported the existence of incompatibility mixture diclofop + dicamba + 2,4-D (720 + 576 + 97 g ha -1 ) used in the control of ryegrass (Lolium mutiflorum) and Gorga (Spergula arvensis) on wheat, barley and rye.…”

Section: Resultsmentioning

confidence: 99%

Glyphosate tolerant volunteer corn control at two development stages

Costa

Zobiole²,

Scariot

et al. 2014

Planta daninha

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-The loss of grains during the harvest of glyphosate tolerant corn may generate volunteer plants, which can interfere in the conventional or glyphosate crop in succession. The current work aim to evaluate the control of the volunteer corn glyphosate tolerant under two weed stages. Aimed to evaluate the control of volunteer glyphosate tolerant corn in two stages of development. There were conducted two experiments with hybrid 2B688 HR (lepidoptera and glyphosate tolerant), the application were at V 5 and V 8 stage. The experiment was randomized block design with four replicates, using the treatments: haloxyfop at 25, 50 and 62 g ha -1 alone and associated with 2,4-D at 670 g ha -1 or fluroxypyr at 200 g ha -1 . The standard was clethodim at 84 g ha -1 with 2,4-D and fluroxypyr at same rates. The applications of haloxyfop and clethodim both isolated or in a mixture with 2,4-D and fluroxypyr at V 5 stage showed total control (100%) at 32 and 39 days after the application, except for haloxyfop + 2,4-D (25 + 670 g ha -1 ) mixture, which did not provided adequate control. At Keywords: enetically modified, in tank mixture, ACCase inhibitors, auxin inhibitors, antagonism, and rampant weed. Palavras-chave: transgênico, mistura em tanque, inibidores da ACCase, inibidores de auxinas, antagonismo, planta daninha. RESUMO -Os

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Section: Resultsmentioning

confidence: 99%

Glyphosate tolerant volunteer corn control at two development stages

Costa

Zobiole²,

Scariot

et al. 2014

Planta daninha

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“…In contrast, corn spurry (Spergula arvensis L.) was practically absent in the first 4 yr, but its populations increased rapidly in the second half of the study (Figure 2D). This weed is usually sufficiently controlled with several of the herbicides used in the experiment, such as glyphosate (Ivany 2004), dicamba (Velloso and Dal'Piaz 1982), and pendimethalin (Haar et al 2001). Spergula arvensis is a summer annual species that can also behave as a winter annual, depending on location and due to seed dimorphism creating variable dormancy levels (Wagner 1988).…”

Section: Weed Population Trajectoriesmentioning

confidence: 99%

Effect of cotton herbicide programs on weed population trajectories and frequency of glyphosate-resistant Palmer amaranth (Amaranthus palmeri)

et al. 2022

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The adoption of dicamba-resistant cotton (Gossypium hirsutum L.) cultivars allows using dicamba to reduce weed populations across growing seasons. However, the overuse of this tool risks selecting new herbicide resistant biotypes. The objectives of this research were to determine the population trajectories of several weed species and track the frequency of glyphosate-resistant Palmer amaranth (Amaranthus palmeri S. Watson) (GR) over 8 years in dicamba-resistant cotton. An experiment was established in North Carolina in 2011, and during the first four years, different herbicide programs were applied. These programs included postemergence applications of glyphosate, alone or with dicamba, with or without residual herbicides. During the last 4 years, all programs received glyphosate plus dicamba. Biennial rotations of postemergence applications of glyphosate only and glyphosate plus dicamba postemergence with and without preemergence herbicides were also included. Sequential applications of glyphosate plus dicamba were applied to the entire test area for the final 4 years of the study. No herbicide program was entirely successful in controlling the weed community. Weed population trajectories were different according to species and herbicide program, creating all possible outcomes; some increased, other decreased, and others remained stable. Density of resistant A. palmeri increased during the first 4 years with glyphosate only programs (up to 11739 plants per m2) and decreased a 96% during the final 4 years when glyphosate plus dicamba was implemented. This species had a strong influence on population levels of other weed species in the community. Goosegras [Eleusine indica (L.) Gaertn.] was not affected by A. palmeri population levels and even increased its density in some herbicide programs, indicating that not only herbicide resistance but also reproductive rates and competitive dynamics are critical for determining weed population trajectories under intensive herbicide-based control programs. Frequency of GR reached a maximum of 62% after 4 years and maintained those levels until the end of the experiment.

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Evaluation of herbicides for weed control in irrigated wheat in Saudi Arabia

Tagel-Din

Ghandorah

Al-Rajhi

et al. 1989

Tropical Pest Management

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In wheat fields, irrigated with treated sewage water, the performance of six herbicides: bromoxynil/MCPA; bentazon/ dichlorprop; diclofop-methyl; tralkoxydim; pendimethalin and bromophenoxim; and some their combinations were assessed at two different locations around the city of Riyadh. The common weeds include: Lolium spp.; Phalaris spp.; Avena spp.; Malva spp.; Chenopodium spp. and others. The best weed control treatments were: bentazon/dichlorprop followed by bromoxynil/MCPA for the broad-leaved, and diclofop-methyl followed by tralkoxydim for the grassy weeds. The combinations of bromoxynil/MCPA with either pendimethalin or tralkoxydim were far more effective against the broad-leaved weeds, and significantly improved the wheat growth and yield, compared with the single treatments. However, bromoxynil/MCPA combination with diclofop-methyl was less effective against the grassy and broad-leaved weeds than each of them. Bromophenoxim showed an effective control of the whole weeds, with appreciable improvement in the wheat growth and yield.

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Controle de azevém (Lolium multiflorum L.), e gorga (Spergula arvensis L.) e seletividade de herbicidas as culturas de trigo, cevada e centeio

Cited by 3 publications

References 1 publication

Glyphosate tolerant volunteer corn control at two development stages

Glyphosate tolerant volunteer corn control at two development stages

Effect of cotton herbicide programs on weed population trajectories and frequency of glyphosate-resistant Palmer amaranth (Amaranthus palmeri)

Evaluation of herbicides for weed control in irrigated wheat in Saudi Arabia

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