Activation of defense mechanism in Lehsua (Cordia myxa) through systemic acquired resistance inducers against Alternaria leaf spot disease

2020 ◽  
Author(s):  
Sushila Choudhary ◽  
R. P. Ghasolia
Keyword(s):  
Leaf Spot ◽  
Systemic Acquired Resistance ◽  
Defense Mechanism ◽  
Acquired Resistance ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Alternaria Leaf Spot ◽  
Cordia Myxa ◽  
Resistance Inducers

Evaluation of the Efficacy of Different Fungicide for the Management of Alternaria Leaf Spot Disease of Chilli

2015 ◽  
Vol 7 (1) ◽  
pp. 53-56 ◽  
Author(s):  
Manoj Kumar Yadav ◽  
◽  
Swati Tyagi ◽  
Shaily Javeria ◽  
Raveesh Kumar Gangwar ◽  
...  
Keyword(s):  
Leaf Spot ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Alternaria Leaf Spot

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

Plant Disease ◽  
2001 ◽  
Vol 85 (8) ◽  
pp. 879-884 ◽  
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.

Biochemical responses of Cotton genotypes to Alternaria leaf spot disease (Alternaria macrospora Zimm.)

2017 ◽  
Vol 25 (2) ◽  
pp. 315
Author(s):  
A.V. Suryawanshi ◽  
R.R. Perane ◽  
K.S. Raghuwanshi ◽  
V.S. Shinde
Keyword(s):  
Leaf Spot ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Biochemical Responses ◽  
Alternaria Leaf Spot ◽  
Cotton Genotypes

Efficacy of systemic acquired resistance inducers in olive leaf spot management

2012 ◽  
Vol 42 (2) ◽  
pp. 163-168 ◽  
Author(s):  
Friday O. Obanor ◽  
Monika Walter ◽  
E. Eirian Jones ◽  
Marlene V. Jaspers
Keyword(s):  
Leaf Spot ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Olive Leaf ◽  
Resistance Inducers

scholarly journals Response of Different Cultivars of Radish (Raphanus Sativus L.) to Alternaria Leaf Spot on Seed Production during Winter at Rupandehi Nepal

2016 ◽  
Vol 4 (3) ◽  
pp. 318-324
Author(s):  
Madhu Sudhan Ghimire ◽  
Prativa Khanal ◽  
Ambika Pokhrel ◽  
Jyotsna Nepal ◽  
Pramod Thagunna ◽  
...  
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Leaf Spot ◽  
Biomass Yield ◽  
Block Design ◽  
Leaf Spot Disease ◽  
Individual Plant ◽  
Disease Symptoms ◽  
Spot Disease ◽  
Alternaria Leaf Spot

A field experiment was laid out in randomized complete block design with three replications and seven cultivars of Radish as treatments for screening against Alternaria leaf spot for seed production. Disease scoring was done as percentage of leaf area infected on individual plant at 7 and 10 days intervals on leaf and siliqua respectively for 3 times, and disease severity and mean AUDPC were calculated and yield was recorded. Disease symptoms appeared first in Long Chetki 22 DAS and last in Green Neck Miyashige 38 DAS. Maximum mean AUDPC (886.7) on foliage was recorded in Long Chetki while minimum mean AUDPC (690.7) was recorded in Green Neck Miyashige Similarly, highest and lowest total mean AUDPC on siliqua were seen on cultivars 40 Days (1080) and Green Neck Miyashige (66.67) respectively. Highest yield was recorded in Green Neck Miyashige (695.2kg/ha) and lowest yield was recorded in cultivar Long Chetki (477.4kg/hac). Similarly, highest test weight was recorded in cultivar Mino Early (10.28gm) and lowest was recorded in cultivar 40-Days (8.4gm). Cultivar, All Season Green Long failed inflorescence formation hence no evidence of siliqua formation therefore bears value 0 for seed yield. Similarly, highest biomass yield excluding root was found in cultivar Subhra-32 (613.3gm/m2) and lowest biomass yield was recorded in cultivar Green Neck Miyashige (341.7gm/m2). Green Neck Miyashige was found resistant to Alternaria leaf spot disease with maximum seed yield (695.2kg/ha). The cultivars Subhra-32 and 40 days were highly susceptible to Alternaria leaf spot disease with minimum seed yield.Int J Appl Sci Biotechnol, Vol 4(3): 318-324

Evaluation of Fungicide Efficacy for the Management of Alternaria Leaf Spot Disease on Chilli

2013 ◽  
Vol 12 (1) ◽  
pp. 32-35 ◽  
Author(s):  
Manoj Kumar ◽  
Vijai Bhadauria ◽  
Kaushlendra Singh ◽  
Chandrajeet Singh ◽  
Anil Kumar Yada
Keyword(s):  
Leaf Spot ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Alternaria Leaf Spot ◽  
Fungicide Efficacy
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