Late Leaf Spot, Southern Stem Rot, and Peanut Yield Responses to Rates of Cyproconazole and Chlorothalonil Applied Alone and in Combination

Culbreath, A. K.; Brenneman, T. B.; Bondari, K.; Reynolds, K. L.; Mclean, Henry S.

doi:10.1094/pd-79-1121

Cited by 33 publications

(25 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chlorothalonil has no activity on stem rot (Culbreath et al, 1995) while flutolanil has no activity on leaf spots (Culbreath et al, 1992) and has minimal effect on peanut rust (Hagan, 2002).…”

Section: Methodsmentioning

confidence: 99%

Maximizing Economic Returns and Minimizing Stem Rot Incidence with Optimum Plant Stands of Peanut in Nicaragua

Augusto¹,

Baldwin²,

Smith³

2010

Peanut Science

View full text Add to dashboard Cite

Peanut growers in Nicaragua use high seeding rates, often greatly in excess of the 19.7 seeds/m recommended for growers in Georgia. Significant yield loss to peanut stem rot (caused by Sclerotium rolfsii) often occurs because of rapid disease spread in high density plant stands. It was hypothesized that lower seeding rates would be beneficial, and field experiments were conducted from 2005 to 2006 in Nicaragua to determine the optimum plant stands for stem rot management, peanut yield, and maximum economic returns. The cultivar Georgia Green was planted in twin rows at seven locations with final stands of 4 to 30 plants/m. Paired plots were either treated or not treated with flutolanil to control stem rot. Stem rot incidence consistently increased with higher peanut plant populations in fields with significant levels (.5%) of stem rot. In fields with more than 5% stem rot incidence, peanut yield and gross income adjusted for seed cost were maximized at within row populations of 12 to 13 and 11 plants/ m, respectively, when treated with flutolanil to reduce stem rot. When flutolanil was not applied, yield and gross income adjusted for seed cost were maximized at 10 to 11 and 8 to 10 plants/m, respectively. In locations with low stem rot incidence (,5%), maximum yield and gross income adjusted for seed cost were attained at within row populations of 13 and 12 plants/m, respectively. Nicaraguan growers may maximize their economic return by utilizing seeding rates to obtain final stand counts of 8 to 11 plants/m in fields with severe stem rot and 12 plants/m with low disease pressure.

show abstract

Section: Methodsmentioning

confidence: 99%

Maximizing Economic Returns and Minimizing Stem Rot Incidence with Optimum Plant Stands of Peanut in Nicaragua

Augusto¹,

Baldwin²,

Smith³

2010

Peanut Science

View full text Add to dashboard Cite

show abstract

“…Curtis, and rust caused by Puccinia arachidis Speg. for over 30 years (7,10,15). Despite its widespread use across the peanut belt, chlorothalonil continues to provide effective control of foliar diseases (8,10,15).…”

Section: Introductionmentioning

confidence: 99%

Using Prothioconazole plus Tebuconazole for Foliar and Soilborne Disease Control in Texas Peanut

2010

View full text Add to dashboard Cite

Field studies were conducted from 2005 through 2008 in different peanut growing areas of Texas to determine both foliar and soilborne disease control and peanut response to prothioconazole plus tebuconazole (Provost) fungicide treatments when compared with other fungicides commonly used in peanut. Early leaf spot (Cercospora arachidicola S. Hori) control with prothioconazole plus tebuconazole was comparable with azoxystrobin (Abound), chlorothalonil (Bravo), or tebuconazole (Folicur) and early leaf spot incidence was reduced at least 36% relative to the untreated check with any fungicide. Southern stem rot (Sclerotium rolfsii Sacc.) control with prothioconazole plus tebuconazole was comparable to azoxystrobin or pyraclostrobin (Headline) and all fungicides reduced disease incidence at least 60% when compared with the untreated check. Peanut yields with prothioconazole plus tebuconazole were increased at least 85% over the untreated check when early leaf spot was present and at least 34% over those of the untreated check when southern stem rot was present.

show abstract

“…Since the pathogen is soil borne, drenching with fungicides is very expensive and impracticable. Although stem rot disease can be controlled by fungicides, such as pentachloronitrobenzene (PCNB) (Harrison 1961;Brenneman et al 1991), azoxystrobin and tebuconazole (Culbreath et al 1995;Augusto et al 2010) to certain extent, these fungicides increase the cost of production and cause environmental pollution. Moreover, frequent application of fungicides may lead to the development of tolerance in the target organism (Smith & Littrell 1980).…”

mentioning

confidence: 99%

Biological control of stem rot of groundnut (Arachis hypogaeaL.) caused bySclerotium rolfsiiSacc. with actinomycetes

Adhilakshmi

Latha

Paranidharan

et al. 2013

Archives Of Phytopathology And Plant Protection

View full text Add to dashboard Cite

A total of 30 isolates of actinomycetes were isolated from the rhizosphere soils of groundnut collected from different parts of Tamil Nadu, India and tested for their inhibitory activity against Sclerotium rolfsii Sacc., the stem rot pathogen of groundnut. Among the various isolates tested in vitro, five isolates (CBE, MDU, PDK, ANR and SA) were found effective in inhibiting the mycelial growth of S. rolfsii in dual culture assay. These isolates were identified as Streptomyces sp. on the basis of standard bacteriological tests and 16S ribosomal RNA gene sequence analysis. Groundnut seeds when treated with Streptomyces sp. strains showed significant increases in root length, shoot length and seedling vigour. Talc-based powder formulations of the Streptomyces sp. strains, CBE, MDU and PDK selected on the basis of their in vitro antagonism on dual plate technique and plant-growth promoting activity were prepared and tested for their efficacy in controlling stem rot of groundnut under greenhouse and field conditions. Seed treatment and soil application of Streptomyces sp. strains CBE, MDU and PDK significantly reduced the incidence of stem rot under greenhouse and field conditions. The highest pod yield was recorded in plots treated with Streptomyces sp. strain CBE when compared to other strains.

show abstract

Late Leaf Spot, Southern Stem Rot, and Peanut Yield Responses to Rates of Cyproconazole and Chlorothalonil Applied Alone and in Combination

Cited by 33 publications

References 0 publications

Maximizing Economic Returns and Minimizing Stem Rot Incidence with Optimum Plant Stands of Peanut in Nicaragua

Maximizing Economic Returns and Minimizing Stem Rot Incidence with Optimum Plant Stands of Peanut in Nicaragua

Using Prothioconazole plus Tebuconazole for Foliar and Soilborne Disease Control in Texas Peanut

Biological control of stem rot of groundnut (Arachis hypogaeaL.) caused bySclerotium rolfsiiSacc. with actinomycetes

Contact Info

Product

Resources

About