Controle de Acacia farnesiana e de Mimosa pteridofita em pastagem

Carmona, Ricardo; Neto, Bernardo Sayão Carvalho Araujo; Pereira, R.C.

doi:10.1590/s0100-204x2001001000013

Cited by 13 publications

(7 citation statements)

References 5 publications

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“…The difference in mortality could be attributed to the height the plants were cut above ground level (20 cm in Experiment A and 5 cm in Experiment B) before the application of herbicide. Other researchers (Carmona et al 2001) have observed a decline in efficacy with increasing height of stem cutting before the application of herbicides. Carmona et al (2001) recorded a 31-86% reduction in efficacy for Acacia farnesiana and a 63-90% reduction in efficacy for Mimosa pteridofita when the plants were cut at 20 cm compared with 0 cm above ground level, before the application of 2,4-D/picloram (9.6/2.56 g a.i./L diesel).…”

Section: Discussionmentioning

confidence: 86%

Calotrope (Calotropis procera) control

Vitelli¹,

Madigan²,

Wilkinson³

et al. 2008

Rangel. J.

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Calotrope [Calotropis procera (Aiton) W.T.Aiton] is an exotic shrub or small tree species that is currently invading the tropical savannahs of northern Australia. A chemical trial involving 11 herbicides and four application methods (foliar, basal bark, cut stump and soil applied) was undertaken to identify effective chemicals to control calotrope. Of the foliar herbicides tested, imazapyr provided 100% mortality at the rates applied, and the higher rate of metsulfuron-methyl killed 100% of the treated plants. The herbicides 2,4-D butyl ester, fluroxypyr, triclopyr and triclopyr/picloram killed greater than 80% of the plants when applied by a basal bark or cut stump (when cut 5 cm above ground level) method of application. Plants cut close to ground level (5 cm) were controlled more effectively than plants cut 20 cm above ground level. Chemical control (foliar and cut stump spraying) is a cost effective tool to treat calotrope densities <800 plants/ha. Adoption of pasture management practices that promote perennial grasses, in conjunction with strategic chemical control, would further increase the effectiveness and reduce the costs of controlling vast areas of this weed.

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Section: Discussionmentioning

confidence: 86%

Calotrope (Calotropis procera) control

Vitelli¹,

Madigan²,

Wilkinson³

et al. 2008

Rangel. J.

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“…The best efficiency with blade can be attributed to the fact that, in this method, canjiqueira is removed with its root system, and when it is not removed, the blade cuts the plant close to the ground, hindering the regrowth. Carmona et al (2001), working with various systems of control with the arboreal species, such as canjiqueira, the sponge (Acacia farnesiana) and the smallsized and large-sized joint-vetch (Mimosa pteridofita) and two cutting heights, 0 to 20 cm from the ground, verified that the cut flush with the soil presented efficiency of 83.3%, and 20 cm, 43%. These data corroborate that the flush cutting of tree plants provides greater efficiency in the control.…”

Section: Resultsmentioning

confidence: 96%

Economic Injury Level of Canjiqueira in Native Pastures in Pantanal of Nhecolândia

et al. 2019

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Pantanal plain has large extensions of land formed by many types of landscapes suitable to extensive livestock system. Open grasslands and lowlands are formed by forage such as grasses and forbs widely consumed by cattle. However, climatic and human factors can promote the dissemination of invasive shrub species such as canjiqueira (Byrsonima cydoniifolia A. Juss) making it necessary, in many cases, the human intervention to control the invasion. The present work had as objective to determine the economic threshold level to control canjiqueira through two methods: tractor driven blade and link chains pulled by tractor in different invasion levels plants per hectare. Economic Threshold proved to be a tool for efficient and effective management for making decisions of when and how to do the control of canjiqueira in natural pastures of Pantanal of Nhecolândia.

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“…The hiptage plants in the Mossman trial were cut 5 cm above ground level. Other researchers (Carmona et al . 2001; Vitelli et al .…”

Section: Discussionmentioning

confidence: 91%

Control of the invasive liana, Hiptage benghalensis

Vitelli¹,

Madigan²,

Haaren³

et al. 2009

Weed Biology and Management

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The liana, hiptage (Hiptage benghalensis), is currently invading the wet tropics of northern Queensland and remnant bushland in south-eastern Queensland, Australia. Trials using seven herbicides and three application methods (foliar, basal bark, and cut stump) were undertaken at a site in north Queensland (158 700 hiptage plants ha -1 ). The foliar-applied herbicides were only effective in controlling the hiptage seedlings. Of the foliar herbicides trialed, dicamba, fluroxypyr, and triclopyr/picloram controlled >75% of the treated seedlings. On the larger plants, the cut stump applications were more effective than the basal bark treatments. Kills of >95% were obtained when the plants were cut close to ground level (5 cm) and treated with herbicides that were mixed with diesel (fluroxypyr and triclopyr/picloram), with water (glyphosate), or were applied neat (picloram). The costings for the cut stump treatment of a hiptage infestation (85 000 plants ha -1 ), excluding labor, would be $A14 324 ha -1 using picloram and $A5294 ha -1 and $A2676 ha -1 , respectively, using glyphosate and fluroxypyr. Foliar application using dicamba for seedling control would cost $A1830 ha -1 .The costs range from 2-17 cents per plant depending on the treatment. A lack of hiptage seeds below the soil surface, a high germinability (>98%) of the viable seeds, a low viability (0%) of 2 year old, laboratory-stored fruit, and a seedling density of 0.1 seedlings m -2 12 months after a control program indicate that hiptage might have a short-term seed bank. Protracted recolonization from the seed bank would therefore be unlikely after established seed-producing plants have been controlled.

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Controle de Acacia farnesiana e de Mimosa pteridofita em pastagem

Cited by 13 publications

References 5 publications

Calotrope (Calotropis procera) control

Calotrope (Calotropis procera) control

Economic Injury Level of Canjiqueira in Native Pastures in Pantanal of Nhecolândia

Control of the invasive liana, Hiptage benghalensis

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