Effects of Selected Herbicides on the Germination and Infection Process of Puccinia lagenophora, a Biocontrol Pathogen of Senecio vulgaris

Wyss, Gabriela; Müller‐Schärer, Heinz

doi:10.1006/bcon.2000.0897

Cited by 30 publications

(20 citation statements)

References 15 publications

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“…We believe that as rust spores parasitize the plant host to acquire nutrients, they become exposed to a lethal dose of systemic glyphosate. This result was demonstrated during germination of rust aeciospores from Puccinia lagenophora, which were inhibited by glyphosate at 22 g͞ml glyphosate (22).…”

Section: Discussionmentioning

confidence: 67%

Glyphosate inhibits rust diseases in glyphosate-resistant wheat and soybean

Feng

Baley

Clinton

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

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Glyphosate is a broad-spectrum herbicide used for the control of weeds in glyphosate-resistant crops. Glyphosate inhibits 5-enolpyruvyl shikimate 3-phosphate synthase, a key enzyme in the synthesis of aromatic amino acids in plants, fungi, and bacteria. Studies with glyphosate-resistant wheat have shown that glyphosate provided both preventive and curative activities against Puccinia striiformis f. sp. tritici and Puccinia triticina, which cause stripe and leaf rusts, respectively, in wheat. Growth-chamber studies demonstrated wheat rust control at multiple plant growth stages with a glyphosate spray dose typically recommended for weed control. Rust control was absent in formulation controls without glyphosate, dependent on systemic glyphosate concentrations in leaf tissues, and not mediated through induction of four common systemic acquired resistance genes. A field test with endemic stripe rust inoculum confirmed the activities of glyphosate pre-and postinfestation. Preliminary greenhouse studies also demonstrated that application of glyphosate in glyphosate-resistant soybeans suppressed Asian soybean rust, caused by Phakopsora pachyrhizi.Phakopsora pachyrhizi ͉ Puccinia striiformis f. sp. tritici ͉ Puccinia triticina ͉ disease control

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Section: Discussionmentioning

confidence: 67%

Glyphosate inhibits rust diseases in glyphosate-resistant wheat and soybean

Feng

Baley

Clinton

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

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“…Studies aimed at observing the effects of glyphosate at the initial phases of plant pathogen development have been conducted in different situations 5, 24, 25. Germination of aeciospores of Puccinia lagenophora , used as a mycoherbicide to control Senecio vulgaris , was significantly reduced with increased glyphosate doses on the water agar medium surface 25. High concentrations of this herbicide inhibit growth in the culture medium of several fungi 26…”

Section: Discussionmentioning

confidence: 99%

Glyphosate reduces urediniospore development and Puccinia psidii disease severity on Eucalyptus grandis

Santos¹,

Graça²,

Alfenas³

et al. 2011

Pest Management Science

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“…Negative effects of exposure to glyphosate have been reported for other fungi as well; it reduced the aeciospore germination of the basidiomycete Puccinia lagenophorae Cooke, a biocontrol agent for Senecio vulgaris L. (Wyss and Muller-Scharer 2001) and was fungitoxic to another basidiomycete, Chondrostereum purpureum (Pers.:Fr.) Pouzar, a bioherbicide for forest weeds (Prasad 1994).…”

Section: Effect Of Pesticides On Conidialmentioning

confidence: 97%

Effect of Selected Pesticides on Conidial Germination and Mycelial Growth ofDactylaria higginsii, a Potential Bioherbicide for Purple Nutsedge (Cyperus rotundus)

et al. 2006

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The suitability of a bioherbicide as a component of an integrated weed management program not only relies on its field efficacy, but also on its compatibility with other pest control measures that may be employed during the cropping season. The effects of selected pesticides applied according to label rates onDactylaria higginsii, a biological control agent for purple nutsedge, were determined using mycelial growth on pesticide-amended potato dextrose agar (PDA) and conidial germination as indicators of pesticide sensitivity. Among the pesticides tested, the herbicides oxyfluorfen and sethoxydim and the fungicides fosetyl-Al and thiophanate methyl inhibitedD. higginsiimycelial growth and reduced or completely inhibited conidial germination; the herbicide diuron, the fungicides metalaxyl and copper hydroxide, and the insecticide cyromazine reduced mycelial growth but did not reduce conidial germination. The miticide dicofol reduced mycelial growth and completely inhibited conidial germination while the herbicide imazapyr had no adverse effect on either the mycelial growth or conidial germination ofD. higginsii.

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Effects of Selected Herbicides on the Germination and Infection Process of Puccinia lagenophora, a Biocontrol Pathogen of Senecio vulgaris

Cited by 30 publications

References 15 publications

Glyphosate inhibits rust diseases in glyphosate-resistant wheat and soybean

Glyphosate inhibits rust diseases in glyphosate-resistant wheat and soybean

Glyphosate reduces urediniospore development and Puccinia psidii disease severity on Eucalyptus grandis

Effect of Selected Pesticides on Conidial Germination and Mycelial Growth ofDactylaria higginsii, a Potential Bioherbicide for Purple Nutsedge (Cyperus rotundus)

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