Paraquat-resistant biotype of Erigeron sumatrensis RETZ. in mulberry fields in Saitama Prefecture.

Hanioka, Yasuo

doi:10.3719/weed.34.210

Cited by 4 publications

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“…). In previous studies, paraquat‐resistant biotypes exhibited a 30‐ to 100‐fold resistance in whole plant bioassay (Hanioka, ; Preston et al ., ).…”

Section: Discussionmentioning

confidence: 92%

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Resistance to paraquat in Mazus pumilus

et al. 2013

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Mazus pumilus is an annual self-pollinating weed that is commonly found in arable land, vegetable gardens and roadsides. This weed harbours insects and pathogens that attack vegetables. The mechanism of resistance to paraquat of M. pumilus found in Ohita, Japan, was studied. Whole plant bioassays revealed that the resistant (R) biotypes were four to six times less susceptible than controls. Chlorophyll destruction of leaf discs by paraquat treatment in R biotypes was 4-20 times lower than those of susceptible (S) biotypes. Ferric reducing antioxidant power (FRAP) values in R biotypes were higher than those of S biotypes before and after paraquat treatments. The activity of superoxide dismutase (SOD) was also higher in R biotypes than those of S biotypes before and after treatment with paraquat, but the activities of ascorbate peroxidase (APX) and catalase (CAT) were not different between R and S biotypes. Change of ascorbate (AsA) contents before and after paraquat treatment was equivalent in both biotypes. These results indicate that the increased SOD activity and antioxidant capacity in R biotypes contribute to the resistance to paraquat of M. pumilus.

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“…). In previous studies, paraquat‐resistant biotypes exhibited a 30‐ to 100‐fold resistance in whole plant bioassay (Hanioka, ; Preston et al ., ).…”

Section: Discussionmentioning

confidence: 92%

“…Paraquat has been used for total vegetation control in mulberry fields, vineyards, around glasshouses for vegetable production and in non‐cropping areas in Japan. Paraquat‐resistant biotypes have been detected in four Asteracae weed species (Hanioka, ).…”

Section: Introductionmentioning

confidence: 99%

Resistance to paraquat in Mazus pumilus

et al. 2013

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“…So far, only five reports of resistance to herbicides have been described for C. sumatrensis . Four of them were related to resistance to paraquat: in Japan (Hanioka ) and in Sri Lanka and Taiwan (Heap ). Only one case referred to glyphosate, which was in Spain (González‐Torralva et al .…”

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confidence: 99%

Conyza sumatrensis: A new weed species resistant to glyphosate in the Americas

Santos

Oliveira

Constantin

et al. 2014

Weed Biology and Management

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Recent reports of weed‐control failures after the use of glyphosate led to suspicion about the selection of resistant biotypes of Conyza at locations in west and north Paraná, Brazil. Plants were collected, identified as Conyza sumatrensis and subsequently evaluated for possible resistance to glyphosate in four stages of weed development. The experiments were carried out in a greenhouse by combining biotypes, stages of development and a range of glyphosate doses. All the suspected biotypes were collected from locations in Cascavel, Toledo, Assis Chateaubriand, Tupãssi and Campo Mourão with a history of glyphosate use in burndown and in glyphosate‐resistant soybean for at least the four previous years and were compared to a susceptible biotype (São Jorge do Ivaí) with no previous history of herbicide use. The doses of glyphosate ranged from 0 to 5760 g ae ha−1. The biotypes were considered as resistant if two combined criteria were present (resistance factor > 1 and the rate required to achieve 80% control is >720 g ha−1). The results provided evidence that there is a marked difference in the level of control of older plants and also confirmed the presence of some resistant biotypes. For applications at the first stage of development, two biotypes that were resistant to glyphosate were identified (Cascavel‐1 and Tupãssi‐6). For applications in the second stage of development, beyond the biotypes that were found in the first stage, three other biotypes were considered as resistant: Toledo‐5, Assis Chateaubriand‐7 and Floresta‐10. However, for applications at the third and fourth stages, all the biotypes were considered as resistant.

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“…Conyza sumatrensis is native to South America and has spread to the tropical and subtropical areas of all continents [2] [3]. Populations of this species have evolved resistance to herbicides under three mode-of-action groups, namely, photosystem I inhibitors [10] [11], glyphosate [12] and acetolactate synthase (ALS) inhibitors [11].…”

Section: Introductionmentioning

confidence: 99%

<i>Conyza sumatrensis</i> Intrapopulation Variation in Response to Glufosinate

Brito¹,

Carbonari²,

Marchesi³

et al. 2019

AJPS

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We aimed to study the response of Conyza sumatrensis to different doses of glufosinate, intrapopulation variation in sensitivity to the herbicide, and the heritability of phenotypic response, and model the evolution of resistance. Three studies were conducted in the greenhouse with two repetitions. First, we tested doses of glufosinate (0, 50, 100, 200, 400, 800 g a.i. ha −1) plus a nontreated check, with four replications. Second, we examined the range in sensitivity of 44 plants to 200 g a.i. ha −1 glufosinate. Third, we evaluated the sensitivity of the progeny of six glufosinate-treated plants to 200 g a.i. ha −1 glufosinate. Plant response was evaluated visually and the ammonium content in leaf tissues was measured. Glufosinate at 400 g a.i. ha −1 caused the highest injury to C.sumatrensis plants. Ammonia accumulation occurred in response to glufosinate treatment, regardless of dose. Ammonia accumulation was correlated strongly with the level of visible plant injury; thus, it is a good indicator of herbicide efficacy. Sensitivity to glufosinate was highly variable within the population. Plants with high ammonia concentration (high injury) after treatment with glufosinate produced progenies that also had high ammonia concentrations after herbicide treatment. The variation in ammonia accumulation among siblings was high. Simulating the exclusion of plants that accumulated more ammonia produced a population that is expected to be less sensitive to glufosinate in the next generation. The stronger the selection pressures by a simulated treatment with glufosinate, the greater the reduction in ammonia accumulation in the progeny and expected sensitivity to glufosinate.

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Paraquat-resistant biotype of Erigeron sumatrensis RETZ. in mulberry fields in Saitama Prefecture.

Cited by 4 publications

References 0 publications

Resistance to paraquat in Mazus pumilus

Resistance to paraquat in Mazus pumilus

Conyza sumatrensis: A new weed species resistant to glyphosate in the Americas

<i>Conyza sumatrensis</i> Intrapopulation Variation in Response to Glufosinate

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Paraquat-resistant biotype of Erigeron sumatrensis RETZ. in mulberry fields in Saitama Prefecture.

Cited by 4 publications

References 0 publications

Resistance to paraquat in Mazus pumilus

Resistance to paraquat in Mazus pumilus

Conyza sumatrensis: A new weed species resistant to glyphosate in the Americas

&lt;i&gt;Conyza sumatrensis&lt;/i&gt; Intrapopulation Variation in Response to Glufosinate

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<i>Conyza sumatrensis</i> Intrapopulation Variation in Response to Glufosinate