Baseline sensitivity and efficacy of trifloxystrobin against Sclerotinia sclerotiorum

Di, Ya-Li; Zhu, Zhihao; Lu, Xiao-Ming; Zhu, Fuxing

doi:10.1016/j.cropro.2016.04.020

Cited by 39 publications

(15 citation statements)

References 27 publications

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“…However, rape is susceptible to insect pests especially fungal diseases during its entire growth period, which can significantly impact yield [ 6 ]. While spraying with insecticides and fungicides protects the crop [ 7 ], it conversely leads to the contamination of apicultural products. A wide range of neonicotinoid insecticides and fungicides have been detected in pollen produced by bees fluttering among oilseed rape and wild flowers nearby and reveal the serious consequences of simultaneous exposure of bees to complex mixtures of pesticides [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Transfer and Metabolism of Triadimefon Residues from Rape Flowers to Apicultural Products

Zhou

Qian

et al. 2017

Journal of Analytical Methods in Chemistry

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This paper presents a study on the transfer and metabolism of triadimefon residues from rape flowers to apicultural products. In the field trials, honeybee colonies were placed in four rape greenhouses treated with triadimefon on standard dosage. Apicultural products (pollen, honey, and royal jelly) were collected on a regular basis. Sample preparation and extraction procedure were established. HPLC/ESI-MS/MS method was validated. The respective residues of triadimefon and metabolite triadimenol were 0.03 ± 0.002 mg/kg and 0.13 ± 0.02 mg/kg in pollen on the 18th day, and both had reached the limits of detection in honey on the 24th day, while they were 0.004 ± 0.0005 mg/kg and 0.010 ± 0.0002 mg/kg in royal jelly on the 22nd day. Mathematical curve fitting studies were further investigated. On the basis of recommended dosage, the degradation half-lives of triadimefon in pollen, honey, and royal jelly were about 0.7, 12.5, and 19.5 days, respectively. Transfer of triadimefon residues from rape flowers to apicultural products diminished over spraying time. The residues of triadimefon and metabolite triadimenol in pollen were about 10 times higher than those in honey and jelly. Time to attain the maximum permissible limit of pollen in the European Union was 14.9 days, predicted from the index function.

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Section: Introductionmentioning

confidence: 99%

Transfer and Metabolism of Triadimefon Residues from Rape Flowers to Apicultural Products

Zhou

Qian

et al. 2017

Journal of Analytical Methods in Chemistry

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“…The ascomycete fungus S. sclerotiorum may infect more than 400 plant species, including canola, dry bean, sunflowers or lettuce, causing difficult to control diseases commonly known as white mold or Sclerotinia head rot. Yield losses may reach even 50-70%, depending on the season and region (Di et al 2016;Dunker and von Tiedemann 2004;Koch et al 2007). B. cinerea, also known as the gray mold, is a necrotrophic pathogen which infects a wide range of fruit, vegetable and ornamental crops.…”

Section: Resultsmentioning

confidence: 99%

Dicationic triazolium fungicidal ionic liquids with herbicidal properties

et al. 2019

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The purpose of the present study was to synthesize the dicationic ionic liquids exhibiting herbicidal and fungicidal activities. A homologue series of ten dicationic ionic liquids was synthesized using commercial triazole fungicide (tebuconazole) and evaluated in terms of their possible antifungal and herbicidal activities. Dicationic triazolium compounds containing different linkers were prepared via acid-base reaction between the corresponding dicationic hydroxides and herbicides in the form of free acids. Additionally, the ionic liquids were fully characterized using NMR and thermal analysis. The herbicidal efficacy was tested during greenhouse experiments, using lambsquarters and oilseed rape as the test plants. In the case of determination of antifungal activity, six fungal species were used: Sclerotinia sclerotiorum, Botrytis cinerea, Fusarium culmorum, Fusarium oxysporum, Colletotrichum sp. and Monographella nivalis. The obtained results indicate that the conversion of compounds into dicationic ionic liquids affects their fungicidal and herbicidal activity. In the case of tests carried out on fungi, no difference in activity was observed at higher doses, except Monographella nivalis. However, at lower concentration (10 ppm), there is a reduction in efficacy compared to the reference substance. In addition, all obtained compounds are characterized by high activity.

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“…Efficient chemical control of SSR relies on prophylactic application of fungicides, since curative spraying does not revert yield losses despite being effective in reducing the inoculum potential for subsequent crops. The intensive long-term fungicide-based management strategies for the control of this disease resulted in the development of resistant S. sclerotiorum strains toward many active ingredients (such as carbendazim, dimetachlone, and thiophanate-methyl), demanding constant baseline sensitivity studies to monitor the field efficacy of chemicals [23][24][25][26][27][28][29]. The need to introduce alternative molecules to control this devastating pathogen, allied to environmental and food securities, opened the market for bioproducts.…”

Section: Situation Of Sclerotinia Stem Rot In Brazilmentioning

confidence: 99%

Trichodermaas a Biocontrol Agent againstSclerotiniaStem Rot or White Mold on Soybeans in Brazil: Usage and Technology

Juliatti¹,

Rezende²,

Juliatti³

et al. 2019

Trichoderma - The Most Widely Used Fungicide

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Biological control agents are alternatives to chemical pesticides in the management of plant diseases. Currently, hundreds of bioproducts are commercially available in international market varying mainly in antagonistic microorganisms and formulation. We screened four Trichoderma-based products as to their efficacy in controlling Sclerotinia stem rot (SSR) under protected and field environments and their effect on soybean seeds' sanity and physiological qualities. We also tested application technologies through seed microbiolization and foliar spraying to deliver the microorganisms, and their compatibility with chemical fungicides. In vitro assays showed that all Trichoderma strains were antagonistic to S. sclerotiorum evidencing hyperparasitic activity. Moreover, the bioproducts reduced fungi incidence on soybean seeds, promoted faster seedling emergence and did not hamper seeds' vigor. Increases of 14 and 37% were registered for root length and shoot fresh weight over that of the untreated control indicating potential application of the bioproducts as soybean growth promoters. Thiophanate-methyl and procymidone were the most compatible, without drastically affecting spore germination or mycelium growth. Under field conditions, all Trichoderma strains reduced SSR incidence and increased soybean grain yield. Formulation interferes on bioproducts' viability and efficacy deserving special attention upon development.

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Baseline sensitivity and efficacy of trifloxystrobin against Sclerotinia sclerotiorum

Cited by 39 publications

References 27 publications

Transfer and Metabolism of Triadimefon Residues from Rape Flowers to Apicultural Products

Transfer and Metabolism of Triadimefon Residues from Rape Flowers to Apicultural Products

Dicationic triazolium fungicidal ionic liquids with herbicidal properties

Trichodermaas a Biocontrol Agent againstSclerotiniaStem Rot or White Mold on Soybeans in Brazil: Usage and Technology

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