Effect of benomyl on 'blackleg' disease of rape in Western Australia

Brown, Agp; Barbetti, MJ; Wood, PM

doi:10.1071/ea9760276

Cited by 18 publications

(14 citation statements)

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“…Control has been variable and often poor in Australia (Barbetti 1974(Barbetti , 1982Brown et al 1975 England, good control has been achieved with two or more applications of fungicide (Rawlinson & Muthalyu 1979), but not with any consistency (Rawlinson et al 1984). Research in Canada has also provided variable and often marginal results (Kaskiw 1986;Kharbanda 1989b;Morrall et al 1988aMorrall et al , 1988bXi et al 1986).…”

Section: Controlmentioning

confidence: 93%

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History, occurrence, impact, and control of blackleg of rapeseed

Gugel¹,

Petrie²

1992

Canadian Journal of Plant Pathology

160

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Section: Controlmentioning

confidence: 93%

“…Results of greenhouse and field studies, however, have been variable. In Australia, Brown et al (1975) found that benomyl applied to seed before sowing protected rapeseed seedlings in the greenhouse, but they could find no effect in field trials. Kharbanda (1989b) obtained similar results in Canada using benomyl and five other fungicides.…”

Section: Controlmentioning

confidence: 96%

History, occurrence, impact, and control of blackleg of rapeseed

Gugel¹,

Petrie²

1992

Canadian Journal of Plant Pathology

160

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“…Use of foliar fungicides in association with cultivars with little or no resistance has proved to be ineffective for phoma stem canker control in Australia (Brown et al ., 1976). In Canada, propiconazole has sometimes been used as a foliar fungicide but it does not give complete control of phoma stem canker (Kharbanda et al ., 1999).…”

Section: Implications For Disease Managementmentioning

confidence: 99%

Epidemiology and management of Leptosphaeria maculans (phoma stem canker) on oilseed rape in Australia, Canada and Europe

Kharbanda²,

et al. 2001

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Phoma stem canker (blackleg), caused by Leptosphaeria maculans, is an important disease on oilseed rape (canola, rapeseed, Brassica napus, Brassica juncea, Brassica rapa) causing seedling death, lodging or early senescence in Australia, Canada and Europe, but not in China. The two forms of L. maculans (A group and B group) that occur on oilseed rape are now considered to be separate species. The epidemiology and severity of phoma stem canker differs between continents due to differences in the pathogen population structure, oilseed rape species and cultivars grown, climate and agricultural practices. Epidemics are most severe in Australia, where only the A group occurs, and can be damaging in Canada and western Europe, where both A and B groups occur, although their proportions vary within regions and throughout the year. Epidemics are slight in China, where the A group has not been found. Dry climates (Australia, western Canada) lengthen the persistence of infected debris and may synchronize the release of airborne ascospores (after rain) with seedling emergence. L. maculans spreads from cotyledon and leaf infections down petioles to reach the stem, with infections on cotyledons and leaves early in the season producing the most damaging stem cankers at the stem base (crown). Development of both crown cankers and phoma stem lesions higher up stems is most rapid in regions with high temperatures from flowering to harvest, such as Australia and Canada. Breeding for resistance (genetic, disease escape or tolerance), stubble management, crop rotation and fungicide seed treatments are important strategies for control of phoma stem canker in all areas. Fungicide spray treatments are justified only in regions such as western Europe where high yields are obtained, and accurate forecasts of epidemic severity are needed to optimize their use.

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“…Now that periods of maximum spread and infection by L. maculans have been identified, the timing of fungicide foliar sprays can be examined critically. However, in recent replicated field trials in eastern England by the Agricultural Development and Advisory Service, benzimidazole fungicides have not proved very effective in controlling L. maculans in the growing crop (Gladders, unpubl), confirming the results of Brown et al, (1976).…”

mentioning

confidence: 94%

Observations on the epidemiology of Leptosphaeria macutans stem canker in winter oilseed rape

Gladders¹,

Musa²

1980

Plant Pathology

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The main source of Leptosphaeria maculans (Desm.) Ces. & de Not. infection on winter oilseed rape in Cambridgeshire was stubble debris from the previous season. Heavy leaf spot infection of seedlings near unploughed oilseed rape stubble resulted in complete crop loss. The fungus actively colonised stubble debris after harvest and perithecia were formed predominantly on tissues colonised during this period. Ascospores were detected throughout the year, mainly from October to April. The degree of leaf spot infection in the autumn was correlated with stem canker infection at the end of flowering and with severe stem lesions at harvest. The incidence of leaf spot infection was greater in the spring than in the autumn, particularly during the period of extension growth and early flowering. Stem canker infections were first seen in March and continued to develop up to and after harvest.

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Effect of benomyl on 'blackleg' disease of rape in Western Australia

Cited by 18 publications

References 0 publications

History, occurrence, impact, and control of blackleg of rapeseed

History, occurrence, impact, and control of blackleg of rapeseed

Epidemiology and management of Leptosphaeria maculans (phoma stem canker) on oilseed rape in Australia, Canada and Europe

Observations on the epidemiology of Leptosphaeria macutans stem canker in winter oilseed rape

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