The effect of varying rates of glyphosate and an organosilicone surfactant on the control of gorse

Balneaves, J.M.; Gaskin, R.E.; Zabkiewicz, J. A.

doi:10.1111/j.1744-7348.1993.tb04055.x

Cited by 11 publications

(12 citation statements)

References 10 publications

(7 reference statements)

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“…Gaskin et al (1996) showed that height growth of tomatoes, treated with a constant but sub-lethal rate of glyphosate, could be predicted (P<0.0002, R 2 = 75%) by a linear model using total organosilicone dose (rate/ha) over a wider range of application volumes (50-400 litre/ha). Decreasing the percent concentration of organosilicone surfactant can decrease herbicide uptake (Stevens and Zabkiewicz 1990) and efficacy (Balneaves et al 1993). Thus if the volume of added surfactant is expressed in terms of percentage (v/v%) rather than at a fixed rate per hectare, it can be envisaged that, as spray volume is decreased, a point may be reached when quantity of organosilicone is insufficient to enhance uptake.…”

Section: Resultsmentioning

confidence: 99%

“…Woody weeds, which severely reduce tree growth if allowed to develop unchecked, have proved difficult to control with herbicides. Balneaves et al (1993) showed that although high rates of glyphosate failed to control gorse, adding an organosilicone surfactant to the spray mix dramatically increased efficacy. There was a highly significant interaction between surfactant rate and herbicide dosage; efficacy could be maintained at lower herbicide rates by increasing surfactant rate.…”

Section: Introductionmentioning

confidence: 99%

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Herbicide efficacy in relation to herbicide rate, surfactant rate and spray application volume

Ray¹,

Richardson²,

Vanner³

et al. 1999

pnzppc

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In two experiments, a central composite response surface design was used to investigate the interactions between herbicide rate (glyphosate in Experiment 1 and metsulfuron in Experiment 2), surfactant rate, and spray application volume on tomato dry weight production. In both experiments, dry weight production was affected by herbicide, and surfactant rate but not spray application volume. Equations derived to predict the response of tomato dry weight production to rates of either, glyphosate or metsulfuron, and surfactant explained 89% and 75% of the observed variability respectively. The results suggest that spray application volumes may be decreased without reducing herbicidal efficacy, provided the rates of herbicide and surfactant are maintained constant.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Herbicide efficacy in relation to herbicide rate, surfactant rate and spray application volume

Ray¹,

Richardson²,

Vanner³

et al. 1999

pnzppc

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show abstract

“…The effect observed with the addition of silicone surfactant in the lowest glyphosate dose can be the result of this product capacity to reduce the droplet surface tension, facilitating the scattering and providing a larger contact area between the leaf surface and the herbicide, which leads to increased absorption (Stevens et al, 1994;Martins et al, 2010). Furthermore, according to Balneaves et al (1993), using herbicide underdoses is what allows the effects of different surfactants on herbicides to be better evaluated.…”

Section: Resultsmentioning

confidence: 99%

Surfatante siliconado e glyphosate no controle de Brachiaria decumbens

Teixeira¹,

Veronese

Christoffoleti

2015

RBHerbicidas

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-The research goal was to evaluate the effects of silicone surfactant and simulated rainfall in glyphosate efficiency in controlling Brachiaria decumbens. The experiments were carried out at (a unit of the University of São Paulo) Escola Superior de Agricultura Luiz de Queiroz (ESALQ -Luiz de Queiroz College of Agriculture) in greenhouse conditions, in a randomized block design with four replications. In one experiment, a simulated rainfall of 10 mm was carried out, 30 minutes after treatments application, and in the other there was no simulation. The treatments were arranged in a 5x3 factorial arrangement, with the first factor corresponding to the doses of glyphosate (0, 135, 270, 540 and 1080 g ha -1 a.e.), and the second one to the doses of silicone surfactant (0, 50 and 100 mL ha -1 ). The applications were performed at 30 days after sowing. In the presence of a simulated rainfall, the percentage of control was increased and chlorophyll content was reduced in the dose of 135 g ha -1 a.e. of glyphosate, together with 100 mL ha -1 of silicone surfactant. Increase in lipid peroxidation was also observed with the addition of 100 mL ha -1 . In the experiment without a simulated rain, at seven days after treatments application, a higher percentage of control was observed at doses of 540 and 1080 g ha -1 a.e. with 100 mL ha -1 of silicone surfactant. Therefore, the use of silicone surfactant at a dose of 100 mL ha -1 increases the efficiency of glyphosate in the control of Brachiaria decumbens in the absence of simulated rain and rain conditions held for half an hour after application.

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“…With the addition of an organosilicone surfactant, complete mortality of 12 mo old gorse plants was achieved after a mid-summer application of glyphosate at 2.20 kg a.i. ha -1 (Balneaves et al 1993). A combination of 2,4-D (2, 4-dichlorophenoxyacetic acid) with picloram or dicamba may provide effective control (Rolston and Devantier 1983).…”

Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

The biology of Canadian weeds. 112. Ulex europaeus L.

Clements¹,

Peterson²,

Prasad³

2001

Can. J. Plant Sci.

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R. 2001. The biology of Canadian weeds. 112. Ulex europaeus L. Can. J. Plant Sci. 81: 325-337. Gorse (Ulex europaeus L.) is a leguminous shrub native to western Europe and North Africa. During the past century it has greatly expanded its adventive range in Australia, New Zealand, Chile and Europe, and along the Pacific and Atlantic coasts of North America. In Canada, it is found in British Columbia (Vancouver, Vancouver Island, the Gulf Islands and Queen Charlotte Islands) where it is classed as a noxious weed. Gorse is also found from Virginia to Massachusetts on the east coast of North America. The shrub rapidly invades dry and disturbed areas, forming dense thickets that can suppress and inhibit native vegetation, including economically important conifer seedlings. It can occupy the same habitats as Scotch broom [Cytisus scoparius (L.) Link] but usually occurs on drier sites. Both of these legumes threaten native plant communities but U. europaeus persists longer and possesses conspicuous spines. Invasive characteristics of gorse include its evergreen habit, prolific seed production, longevity of seeds in the soil and nitrogen fixation. Human activities such as agriculture and construction of logging roads have accelerated the spread of gorse in British Columbia, but there is still an historic opportunity to restrict the population expansion that this species has exhibited in many other countries. Various methods of control (chemical, manual, biological and integrated) are evaluated. , mais il préfère habituellement des endroits plus secs. Ces deux légumineuses menacent les peuplements d'espèces indigènes, quoique la première persiste plus longtemps et présente des épines très évidentes. Parmi les caractéristiques qui font de l'ajonc d'Europe une plante envahissante, mentionnons un port semblable à celui des conifères, une production abondante de semences, la longévité des graines dans le sol et la capacité de fixer l'azote. Les activités humaines comme l'agriculture et la construction de chemins d'exploitation ont accéléré la propagation de l'ajonc d'Europe en Colombie-Britannique, mais on pourrait encore freiner son expansion, ce qui n'est plus le cas dans d'autres pays. Suit une évaluation de diverses méthodes de lutte (chimique, manuelle, biologique et intégrée).

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The effect of varying rates of glyphosate and an organosilicone surfactant on the control of gorse

Cited by 11 publications

References 10 publications

Herbicide efficacy in relation to herbicide rate, surfactant rate and spray application volume

Herbicide efficacy in relation to herbicide rate, surfactant rate and spray application volume

Surfatante siliconado e glyphosate no controle de Brachiaria decumbens

The biology of Canadian weeds. 112. Ulex europaeus L.

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