Baseline Sensitivity of <i>Didymella bryoniae</i> to Cyprodinil and Fludioxonil and Field Efficacy of these Fungicides Against Isolates Resistant to Pyraclostrobin and Boscalid

Keinath, Anthony P.

doi:10.1094/pdis-09-14-0993-re

Cited by 28 publications

(13 citation statements)

References 34 publications

(84 reference statements)

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“…TCZ [(RS)-1-p-chlorophenyl-4,4-dimethyl-3-(1H-1,2,4-triazol-1-yl methyl)pentan-3-ol] is a systemic triazole fungicide which is used for the control of a range of plant fungal pathogens in different crops including winter cereals (D'Angelo et al, 2014;Keinath, 2015). It is rather persistent in the soil environment with DT 50s ranging from 49 to 610 days (Strickland et al, 2004;EFSA, 2014).…”

Section: Introductionmentioning

confidence: 99%

Dissipation and adsorption of isoproturon, tebuconazole, chlorpyrifos and their main transformation products under laboratory and field conditions

Papadopoulou

Karas

Nikolaki

et al. 2016

Science of The Total Environment

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Assessment of dissipation constitutes an integral part of pesticides risk assessment since it provides an estimate of the level and the duration of exposure of the terrestrial ecosystem to pesticides. Within the frame of an overall assessment of the soil microbial toxicity of pesticides, we investigated the dissipation of a range of dose rates of three model pesticides, isoproturon (IPU), tebuconazole (TCZ), and chlorpyrifos (CHL), and the formation and dissipation of their main transformation products following a tiered lab-to-field approach. The adsorption of pesticides and their transformation products was also determined. IPU was the least persistent pesticide showing a dose-dependent increase in its persistence in both laboratory and field studies. CHL dissipation showed a dose-dependent increase under laboratory conditions and an exact opposite trend in the field. TCZ was the most persistent pesticide under lab conditions showing a dose-dependent decrease in its dissipation, whereas in the field TCZ exhibited a biphasic dissipation pattern with extrapolated DT90s ranging from 198 to 603.4days in the ×1 and ×2 dose rates, respectively. IPU was demethylated to mono- (MD-IPU) and di-desmethyl-isoproturon (DD-IPU) which dissipated following a similar pattern with the parent compound. CHL was hydrolyzed to 3,5,6-trichloro-2-pyridinol (TCP) which dissipated showing a reverse dose-dependent pattern compared to CHL. Pesticides adsorption affinity increased in the order IPU

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Section: Introductionmentioning

confidence: 99%

Dissipation and adsorption of isoproturon, tebuconazole, chlorpyrifos and their main transformation products under laboratory and field conditions

Papadopoulou

Karas

Nikolaki

et al. 2016

Science of The Total Environment

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“…Gummy stem blight (GSB) is one of the most destructive diseases in cucurbits worldwide, especially for melon (Keinath, 2011;Keinath, 2015). In Brazil, GSB is one of the most damaging diseases in melon fields (Gasparotto, Vida, Tessmann, & Alves, 2011;Cardon et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Chemical control has been used to minimize the plant losses; however, even recommended fungicides have shown problems, such as low efficacy and resistance of the pathogen to some chemical groups, including benzimidazoles and thiophanates, pyrimidines-carboxamides, and methoxycarbamates (Keinath, 2015).…”

Section: Introductionmentioning

confidence: 99%

Selection of melon genotypes with resistance to <i>Didymella bryoniae</i> using a diallel approach

et al. 2019

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The development of melon lines resistant to gummy stem blight (GSB) is an important strategy for decreasing losses caused by this disease. Thus, selecting the best parents for such a goal is essential. We evaluated the general (GCA) and specific (SCA) combining abilities of lines and accessions to guide the selection of the most promising parents to develop GSB-resistant lines. Six genotypes representing two groups (group I - susceptible: group II - resistant) were crossed in a partial diallel mating design. The genotypes were evaluated for disease expression using a rating scale from 0 (resistant) to 4 (susceptible). Estimates of GCA were negative and significant for the accessions PI 420145 and PI 482398, which can be suggested for crosses aimed at obtaining melon lines resistant to GSB. There is a reciprocal effect for the resistance of melon genotypes to Didymella bryoniae, especially when PI 482398, PI 420145, and PI 140471 are crossed with JAB-20. Such results indicate that maternal effects may be involved in the resistance to gummy stem blight.

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“…The ascomycete D. bryoniae is one of the most relevant pathogens in the world, causing significant economic losses to the Cucurbitaceae family, particularly melon, watermelon and cucumber (Babu et al, 2015;Keinath, 2015). Gasparotto et al (2011) reported that gummy stem blight is the most devastating disease in melon (Cucumis melo var.…”

Section: Introductionmentioning

confidence: 99%

“…There are reports of appearance of pathogen resistance to systemic fungicides based on benzimidazole and thiofanate, pyrimidine-carboxamide, methoxy-carbamates, which are used to control D. bryoniae in various cucurbits, especially in melons and watermelons (Keinath, 2015).…”

Section: Introductionmentioning

confidence: 99%

Reaction of melon genotypes to Didymella bryoniae (Fuckel) Rehm

Santos

Candido

Rabelo

et al. 2017

Chilean J. Agric. Res.

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Baseline Sensitivity of Didymella bryoniae to Cyprodinil and Fludioxonil and Field Efficacy of these Fungicides Against Isolates Resistant to Pyraclostrobin and Boscalid

Abstract: Keinath, A. P. 2015. Baseline sensitivity of Didymella bryoniae to cyprodinil and fludioxonil and field efficacy of these fungicides against isolates resistant to pyraclostrobin and boscalid. Plant Dis. 99:815-822.

Cited by 28 publications

References 34 publications

Dissipation and adsorption of isoproturon, tebuconazole, chlorpyrifos and their main transformation products under laboratory and field conditions

Dissipation and adsorption of isoproturon, tebuconazole, chlorpyrifos and their main transformation products under laboratory and field conditions

Selection of melon genotypes with resistance to <i>Didymella bryoniae</i> using a diallel approach

Reaction of melon genotypes to Didymella bryoniae (Fuckel) Rehm

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