Antifungal Effects against Phaeoisariopsis personata under Greenhouse Conditions and Phytochemical Analysis of Jatropha curcas Leaf Extracts

The study was conducted to test the antifungal efficacy of J. curcas leaf extracts against Phaeoisariopsis personata (causal pathogen for groundnut late leaf spot disease) under in vivo conditions, and to identify important phytochemical constituents exhibiting antifungal properties. The results showed that the greatest reduction of late leaf spot disease incidence was achieved by all the Jatropha curcas leaf extracts at the highest concentration (0.5 mg mL-1) as 36.89, 36.59 and 24.67% for chloroform, ethyl acetate and methanolic extracts, respectively. Subsequently, J. curcas leaf extracts treatments enhanced the growth and yield of groundnut compared with the control (untreated). The antifungal effects of J. curcas were supported by the presence of phytochemical constituents identified by GC-MS. Hexadecane; n-hexadecanoic acid; phenol, 2, 4 bis (-dimethylethyl); phytol and hexadecanoic methyl ester were detected as major phytocompounds in J. curcas leaf extracts that were possibly responsible for the antifungal activity. © 2021 Friends Science Publishers

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Registration of three peanut allotetraploid interspecific hybrids resistant to late leaf spot disease and tomato spotted wilt

Journal of Plant Registrations ◽

10.1002/plr2.20146 ◽

2021 ◽

Author(s):

Ye Chu ◽

H. Thomas Stalker ◽

Kathleen Marasigan ◽

Chandler M. Levinson ◽

Dongying Gao ◽

...

Keyword(s):

Leaf Spot ◽

Interspecific Hybrids ◽

Leaf Spot Disease ◽

Late Leaf Spot ◽

Spot Disease ◽

Tomato Spotted Wilt

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Screening of Groundnut (Arachis hypogaeaL.) Mini Core Collection against Late Leaf Spot Disease Caused byPhaeoisariopsis personata(Berk & M.A Curtis van Arx)

Indian Journal of Plant Genetic Resources ◽

10.5958/0976-1926.2014.00017.5 ◽

2014 ◽

Vol 27 (3) ◽

pp. 217

Author(s):

Shivaleela S Kukanur ◽

DL Savithramma ◽

A Vijayabharathi ◽

Sheela Duddagi

Keyword(s):

Leaf Spot ◽

Core Collection ◽

Leaf Spot Disease ◽

Late Leaf Spot ◽

Spot Disease ◽

Mini Core Collection

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Lack of Induced Systemic Resistance in Peanut to Late Leaf Spot Disease by Plant Growth-Promoting Rhizobacteria and Chemical Elicitors

Plant Disease ◽

10.1094/pdis.2001.85.8.879 ◽

2001 ◽

Vol 85 (8) ◽

pp. 879-884 ◽

Cited By ~ 57

Author(s):

Shouan Zhang ◽

M. S. Reddy ◽

Nancy Kokalis-Burelle ◽

Larry W. Wells ◽

Stevan P. Nightengale ◽

...

Keyword(s):

Leaf Spot ◽

Acquired Resistance ◽

Plant Growth Promoting Rhizobacteria ◽

Systemic Resistance ◽

Leaf Spot Disease ◽

Late Leaf Spot ◽

Spot Disease ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Significant Disease

A disease assay was optimized for late leaf spot disease of peanut using Cercosporidium per-sonatum in the greenhouse, and this assay was used in attempts to elicit induced systemic resistance using strains of plant growth-promoting rhizobacteria (PGPR) and chemical elicitors. Nineteen strains of spore-forming bacilli PGPR, including strains of Paenibacillus macerans, Brevibacillus brevis, Bacillus laterosporus, B. subtilis, B. pumilus, B. amyloliquefaciens, B. sphaericus, B. cereus, and B. pasteurii, which previously elicited systemic disease control activity on other crops, were evaluated in greenhouse assays. Seven PGPR strains elicited significant disease reduction in a single experiment; however, none repeated significant protection achieved in the greenhouse assay, while significant protection consistently occurred with the fungicide chlorothalonil (Bravo). In other greenhouse trials, neither stem injections of C. personatum nor foliar sprays of chemicals, including salicylic acid, sodium salicylate, isonicotinic acid, or benzo[1,2,3]thiadiazole-7-carbothioc acid S-methyl ester (Actigard), which elicit systemic acquired resistance on other crops, elicited significant disease protection. In contrast, foliar sprays with DL-β-amino-n-butyric acid (BABA), which is an elicitor of localized acquired resistance, resulted in significantly less late leaf spot disease in one of two tests. Combination treatments of four PGPR strains with BABA in the greenhouse did not significantly protect peanut from late leaf spot. Field trials conducted over two growing seasons indicated that none of the 19 PGPR strains, applied as seed treatments at two concentrations, significantly reduced late leaf spot disease. The same chemical elicitors tested in the greenhouse, including BABA, did not elicit significant disease protection. Some combinations of four PGPR and BABA significantly reduced the disease at one but not at two sample times. Collectively, these results suggest that late leaf spot resistance in peanut is not systemically inducible in the same manner as is resistance to diseases in other crops by PGPR and chemical inducers.

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Effect of Temperature and Leaf Wetness Period on the Components of Resistance to Late Leaf Spot Disease in Groundnut

The Plant Pathology Journal ◽

10.5423/ppj.2004.20.1.067 ◽

2004 ◽

Vol 20 (1) ◽

pp. 67-74 ◽

Cited By ~ 1

Author(s):

Suresh Pande ◽

T.Ratna Rajesh ◽

G.Krishna Kishore

Keyword(s):

Leaf Spot ◽

Effect Of Temperature ◽

Leaf Wetness ◽

Leaf Spot Disease ◽

Late Leaf Spot ◽

Spot Disease ◽

Components Of Resistance ◽

Wetness Period ◽

Leaf Wetness Period

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Bioefficacy Study of Bacillus subtilis Based Biofungicide on Leaf Spot Disease, Growth and Yield Attributes of Tomato [Solanum lycopersicum L.] CV. Arka Vikas

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2020/v39i730574 ◽

2020 ◽

pp. 35-41

Author(s):

Ajay Kumar Tiwari ◽

B. K. Singh ◽

Trivikram . ◽

A. K. Singh ◽

Pankaj Kumar Singh

Keyword(s):

Bacillus Subtilis ◽

Solanum Lycopersicum ◽

Leaf Spot ◽

Fruit Yield ◽

Growth And Yield ◽

Leaf Spot Disease ◽

Yield Attributes ◽

Spot Disease ◽

Solanum Lycopersicum L ◽

Yield Parameters

The present study entitled “Bioefficacy study of Bacillus subtilis based biofungicide on leaf spot disease, growth and yield attributes of tomato [Solanum lycopersicum L.] cv. ArkaVikas” was conducted at Vegetable Research Farm, Department of Horticulture, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi during rainy season of 2016-17 in Randomized Block Design (RBD) with three replications. The treatments included foliar spray of chemical fungicide (Copper oxychlooride) and biofungicide (Taegro® and Trichoderma) either alone or in combination. Taegro® is a bacterial biofungicide containing 1×1010 CFU/g (13%w/w) of Bacillus amyloliuefaciens strain FZB24 formulated as WP. A total of 12 characters including disease, growth and yield parameters were studied. Disease parameter included leaf spot disease incidence (%) and disease severity (%) whereas growth and yield parameters included days to 50% flowering, height, number of branches per plant, fruit length (cm), fruit width (cm), number of fruits per plant, average fruit weight (g), number of seed per fruit, fruit yield per plot (kg), fruit yield per hectare (kg) were studied. The biofungicide Taegro exhibited significant potential in reducing the leaf spot in tomato and improving the growth and yield attributes of tomato as compared to control. But combined used of Taegro with standard chemical copper oxychloride gave better result than Taegro alone. As a consequence, this may be used as part of an integrated disease management approach so as to minimizes the use of standard fungicides and also protect the environment from pollution and maintenance of the human health.

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