Post‐infection activities of fungicides againstCercospora arachidicolaof peanut (Arachis hypogaea)

Johnson, Robert C.; Cantonwine, Emily G.

doi:10.1002/ps.3671

Cited by 14 publications

(10 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pesticide concentrations in perilla leaves were likely affected by various factors, including the physicochemical properties of the pesticide [28], crop morphology [8], and environmental factors such as weather and cultivation conditions [29]. The pesticide concentrations in perilla leaf were high because they are absorbed systemically and translocated in the plant [18,19]. Paterson et al [30] reported that pesticide translocation and systemic properties significantly influence crop residue levels, while Park et al [31] stated that systemic pesticides are more persistent than non-systemic ones.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Dissipation, persistence, and risk assessment of fluxapyroxad and penthiopyrad residues in perilla leaf (Perilla frutescens var. japonica Hara)

Noh

Lee²,

Park

et al. 2019

PLoS ONE

View full text Add to dashboard Cite

The objective of this study was to determine the residual characteristics and to calculate the persistence of the fungicides fluxapyroxad (15.3% suspension concentrate) and penthiopyrad (20% emulsifiable concentrate) on the leaves of greenhouse-cultivated perilla ( Perilla frutescens var . japonica Hara ). Fluxapyroxad was diluted 2,000-fold and penthiopyrad was diluted 4,000-fold. Each solution was sprayed 3 times onto crops at 7-d intervals before harvest. Leaf samples were collected at 3 h (0 d), 1, 3, 5 and 7 d after the third and final treatment. The recovery ranges of fluxapyroxad and penthiopyrad and their metabolites were 74.2%–104.1%. Pesticide residue analyses indicated that fluxapyroxad and penthiopyrad residues in perilla leaves dissipated over time. The persistence of fluxapyroxad and penthiopyrad residues 7 d after the final spray were 50.0% ± 4.9% and 44.2% ± 2.8% of those measured 3 h (0 d) after the final spray, respectively. The percent acceptable daily intake (%ADI)—which was assessed according to the daily food intake by Koreans according to age—was < 7.3%. Therefore, it was determined that the health risk was low. The perception that residual pesticides are present in large amounts in perilla leaf has led to consumer concern. However, in this study, the amounts of pesticide in perilla leaf decreased over time. Although it has been hypothesized that the risk of pesticide intake would be higher in younger children, the results actually suggest the opposite. Therefore, the pesticides in question are considered to be safe for use on perilla leaves.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Fluxapyroxad and penthiopyrad were tested in this study because they are translocated in plants [18,19]. The test crop—perilla leaf—was cultivated under greenhouse conditions.…”

Section: Methodsmentioning

confidence: 99%

Dissipation, persistence, and risk assessment of fluxapyroxad and penthiopyrad residues in perilla leaf (Perilla frutescens var. japonica Hara)

Noh

Lee²,

Park

et al. 2019

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…Lower incidence was likely due to some combination of (i) loss of symptomatic leaves or leaflets, (ii) development of new leaves, and (iii) curative activity of the fungicides applied. In a recent laboratory study, applications of prothioconazole or pyraclostrobin reduced the numbers of early leaf spot lesions when applied to peanut leaves as late as 7 days after inoculation and restricted the size of lesions by over 60% when applied as late as 13 days after inoculation (Cantonwine et al 2008;Johnson and Cantonwine 2014). In the field, similar leaf spot control was achieved with delayed applications of these systemic fungicides compared to the protectant chlorothalonil (Culbreath et al 2006;Culbreath et al 2010).…”

Section: Figurementioning

confidence: 99%

“…The incubation period for C. arachidicola varies. It is reported to be as little as 6 to 8 days during optimal conditions (Shokes and Culbreath 1997), but 10 to 11 days on susceptible genotypes has been more commonly observed in controlled studies (Cantonwine et al 2008;Johnson and Cantonwine 2014). The incubation period can vary greatly among cultivars.…”

Section: Figurementioning

confidence: 99%

Effect of In-Furrow and Early-Season Banded Applications of Fungicides on Incidence of Early Leaf Spot of Peanut

Culbreath

Kemerait

Tsai

et al. 2015

Plant Health Progress

Self Cite

View full text Add to dashboard Cite

Field experiments were conducted in Tifton, GA, in 2012-2014 to determine the effect of in-furrow applications of prothioconazole and early-season banded applications of prothioconazole or pyraclostrobin on incidence of early leaf spot (Cercospora arachidicola) of peanut (Arachis hypogaea). In each year, border rows were planted in May as a source of inoculum for plants in the treatment plots. Plots were planted in August or September after epidemics of early leaf spot were severe in the border plots. Fungicide application regimes included two rates (100 and 200 g a.i./ha) of prothioconazole applied in-furrow at planting, and 200 g a.i./ha of prothioconazole or 164 g a.i./ha of pyraclostrobin applied concentrated in a 30-cm band 21 days after planting (DAP). Incidence (percent of leaflets with one or more leaf spot) of early leaf spot was monitored until 54 to 57 days after planting in each year. In all years, disease incidence was below 10% at 28 DAP in plots treated with 200 g a.i./ha of prothioconazole in-furrow compared to over 40% in nontreated plots at the same time. In-furrow applications of 100 g a.i./ha of prothioconazole were less effective, but suppressed leaf spot incidence compared to the control. Banded applications of either fungicide at 21 DAP resulted in a decrease in leaf spot incidence, and prevented increase in leaf spot incidence for 19 days or longer. Accepted for publication 30 November 2015. Published 3 December 2015.

show abstract

“…In the middle and late stages of growth, infections of multiple pathogens lead to a mixture of symptoms that mainly destroy chlorophyll and reduce photosynthetic rate. Defoliation caused by a large number of spots could severely affect dry matter accumulation and pod maturation, resulting in large yield reductions [15].…”

Section: Introductionmentioning

confidence: 99%

The Resistance of Peanut to Soil-Borne Pathogens Improved by Rhizosphere Probiotics Under Calcium Treatment

Zhang

Lin

et al. 2021

Preprint

View full text Add to dashboard Cite

Background: Peanut (Arachis hypogaea L.) is an important oil and economic crop. Calcium can regulate plant autoimmunity, respond to biotic and abiotic stresses, and improve plant resistance to pathogens. The enrichment of beneficial microorganisms in the rhizosphere is related to plant disease resistance and soil development. The purpose was to analyze the differences of peanut rhizosphere microbial community structure between calcium treatment and control during two growth stages, and the reason that calcium application could improve peanut’s resistance to soil-borne pathogens.. Results: The 16S amplicon sequencing of rhizosphere microbiome showed that calcium application significantly enriched Serratia marcescens and other three dominant strains at the seedling stage. At the pod filling stage, ten dominant stains such as Sphingomonas changbaiensis and Novosphingobium panipatense were enriched by calcium. Serratia marcescens aseptic fermentation filtrate was mixed with PDA medium and inoculated with soil-borne pathogens, which could inhibit the growth of Fusarium solani and Aspergillus flavus at the seedling stage. The fermentation filtrate of Novosphingobium panipatense was mixed with PDA medium and inoculated with main pathogens, which could inhibit the growth of Sclerotium rolfsii and Leptosphaerulina arachidicola.Conclusions: Calcium application enhanced the ability of peanuts to resist pathogens by enriching specific dominant bacteria.

show abstract

Post‐infection activities of fungicides againstCercospora arachidicolaof peanut (Arachis hypogaea)

Cited by 14 publications

References 27 publications

Dissipation, persistence, and risk assessment of fluxapyroxad and penthiopyrad residues in perilla leaf (Perilla frutescens var. japonica Hara)

Dissipation, persistence, and risk assessment of fluxapyroxad and penthiopyrad residues in perilla leaf (Perilla frutescens var. japonica Hara)

Effect of In-Furrow and Early-Season Banded Applications of Fungicides on Incidence of Early Leaf Spot of Peanut

The Resistance of Peanut to Soil-Borne Pathogens Improved by Rhizosphere Probiotics Under Calcium Treatment

Contact Info

Product

Resources

About