Effect of plant type on the response of ragwort to rates and times of 2,4-D application

Martin, P.; Thompson, A.; Saunders, A.E.; Rahman, M. A.

doi:10.30843/nzpp.1986.39.9374

Cited by 4 publications

(4 citation statements)

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“…This interaction did not occur on 2,4-D plots because seedlings were much fewer and many plants present may have been established plants. Martin et al, (1986) have reported that larger ragwort plants were more likely to survive 2, 4-D treatment.…”

Section: Discussionmentioning

confidence: 99%

“…Ragwort occurs over a wide range of soil types and fertility levels. Control by any one method is difficult and often unsuccessful, mainly because the soil seed bank is large and the multi-rosette regrowth plants are persistent (Martin et al 1986;Thompson 1980). In addition, some herbicides used for ragwort control seriously damage clovers, reducing pasture quality and quantity (Thompson & Saunders 1984).…”

Section: Introductionmentioning

confidence: 99%

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Ragwort control with herbicides and fertilisers: first year's results

Rahman¹,

Thompson²,

Nicholson³

1990

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Several combinations of N, P and K fertilisers and the herbicides 2,4-D or glyphosate were tested in conjunction with conservation tillage for ragwort (Senecio jacobaea) control in a low fertility hill country pasture. The trial started in March 1988 and assessments have been made for 12 months. Results so far have shown that development of a dense competitive sward by adequate fertiliser is essential to miuimise the ragwort infestation. The combination of 2,4-D and phosphate fertiliser resulted in the best sward composition and growth, and allowed the least re-invasion of ragwort into the pasture. Keywords Senecio jacobaea, 2,4-D, glyphosate, fertilisers, NPK, chemical control, herbicides, dairy pastures, pasture renovation

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ragwort control with herbicides and fertilisers: first year's results

Rahman¹,

Thompson²,

Nicholson³

1990

ProNZG

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“…The problem of difficult to control and herbicide resistant weeds in pasture has resulted in management problems on many New Zealand farms (Martin et al 1986;Harrington and Popay 1987). In response to this situation, 2,4-D + picloram and clopyralid have recently been registered for broadcast application to pastures.…”

Section: Introductionmentioning

confidence: 99%

Pasture tolerance to the herbicide metsulfuron-methyl

James¹,

Rahman²,

Cornwell³

1999

pnzppc

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Trials were carried out in spring and autumn at two locations in New Zealand to measure the effects of metsulfuron-methyl on pasture production and composition. Metsulfuron-methyl at 3-12 g/ha resulted in 20-45% loss of herbage production. This was particularly evident for two months after spraying, with no significant reduction in dry matter yield 3 months after treatment in spring. The effect on pasture composition was more persistent. Metsulfuron-methyl, along with clopyralid and picloram + 2,4-D completely removed the clover for the three month duration of the trial. The consequences of broadcast application of these herbicides in pasture need to be considered in the context of the overall farming system.

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“…It is toxic to stock, is a prolific seeder and is able to colonise large tracts of land. The phenoxy herbicide 2,4-D is widely used for control of this weed (Martin et al 1986). Several biological control agents have also been released (Harman and Syrett 1989), but they have not been entirely successful.…”

Section: Introductionmentioning

confidence: 99%

Flazasulfuron for control of ragwort (<i>Senecio jacobaea</i>) in pasture

James¹,

Rahman²,

Jong³

1997

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Nine trials were carried out over two years in Waikato to evaluate the new sulfonylurea herbicide flazasulfuron for control of ragwort in pasture. It was tested both as a broadcast application and a directed spot treatment. Its effect on pasture was measured in two weed-free trials. At 4 and 5 g/ ha flazasulfuron gave very good control of ragwort but was damaging to pasture, particularly the perennial ryegrass component. Applied as a spot treatment at 0.5 g/litre, flazasulfuron gave excellent control of ragwort plants and avoided the problem of pasture damage.

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Effect of plant type on the response of ragwort to rates and times of 2,4-D application

Cited by 4 publications

References 0 publications

Ragwort control with herbicides and fertilisers: first year's results

Ragwort control with herbicides and fertilisers: first year's results

Pasture tolerance to the herbicide metsulfuron-methyl

Flazasulfuron for control of ragwort (<i>Senecio jacobaea</i>) in pasture

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