scholarly journals Effect of Abscisic Acid, Salicylic Acid, Potassium Silicate, and Trichoderma harzianum As Biocontrol Agent to Induce the Tomato Resistance Against Early Blight Disease Caused by Alternaria solani

2021 ◽  
Vol 42 (3) ◽  
pp. 773-787
Author(s):  
Ibrahim Adss ◽  
Ghoname. M. Amer ◽  
Shokry R. Bayoumy ◽  
Asia. R. Eid
Keyword(s):  
Salicylic Acid ◽  
Abscisic Acid ◽  
Trichoderma Harzianum ◽  
Early Blight ◽  
Biocontrol Agent ◽  
Alternaria Solani ◽  
Potassium Silicate ◽  
Blight Disease

scholarly journals Kemampuan Kompos dan Kompos Plus untuk Meningkatkan Ketahanan Tanaman Tomat terhadap Penyakit Bercak Coklat (Alternaria solani Sor.)

Agrikultura ◽  
2017 ◽  
Vol 28 (3) ◽  
Author(s):  
Noor Istifadah ◽  
Nasrul Hakim
Keyword(s):  
Disease Control ◽  
Plant Resistance ◽  
Trichoderma Harzianum ◽  
Early Blight ◽  
Organic Fertilizer ◽  
Water Extract ◽  
Alternaria Solani ◽  
Antagonistic Fungi ◽  
Application Methods ◽  
Blight Disease

ABSTRACTAbilities of compost and compost plus to enhance tomato resistance to early blight (Alternaria solani Sor.)Compost can be used for organic fertilizer and also for disease control. To enhance its effectiveness, compost was fortified with antagonistic microbes and called compost plus. The aims of this study were to examine the potential of compost plus and its component, compost and antagonistic fungi (Trichoderma harzianum, Papulaspora sp. and Paecylomyces sp.) to enhance tomato resistance to early blight disease (Alternaria solani) and also to obtain the effective and efficient application methods of compost plus for enhancing the plant resistance. The results showed that compos, compost plus and T. harzianum enhanced the tomato resistance so that suppressed early blight disease by 39.2%-40.1%. The application methods were not significantly influenced the effectiveness of compost plus in enhancing the plant resistance. The application of compost plus as seed dressing, in the planting site or spraying water extract onto leaves solely or in combination suppress early blight disease by 31.96%-42.08%. The separation between the treatments and pathogen inoculation indicated the increase or induction of tomato resistance to the disease.Keywords: Antagonistic microbes, Trichoderma harzianum, Application method, Induced resistanceABSTRAKKompos selain dapat berfungsi sebagai pupuk organik juga dapat dimanfaatkan untuk pengendalian penyakit. Guna meningkatkan keefektifannya, kompos ditambah dengan jamur antagonis dan disebut ‘kompos plus’. Penelitian ini bertujuan untuk menguji kemampuan kompos plus dan komponen penyusunnya yaitu kompos dan jamur antagonis (Trichoderma harzianum, Papulaspora sp. dan Paecylomyces sp.) untuk meningkatkan ketahanan tanaman tomat terhadap penyakit bercak coklat dan mendapatkan cara aplikasi kompos plus yang efektif dan efisien untuk meningkatkan ketahanan tanaman. Hasil percobaan menunjukkan bahwa kompos plus, kompos, dan T. harzianum dapat meningkatkan ketahanan tanaman tomat sehingga menekan penyakit bercak coklat sebesar 39,2%-40,1%. Cara aplikasi kompos plus tidak berpengaruh secara nyata terhadap kemampuannya dalam meningkatkan ketahanan tanaman. Aplikasi kompos plus dengan cara perendaman benih dalam air rendaman kompos plus, aplikasi pada lubang tanam atau penyemprotan dengan air rendaman kompos baik secara tunggal maupun dengan cara gabungan dapat menekan penyakit bercak coklat sebesar 31,96%-42,08%. Pemisahan tempat antara perlakuan dengan inokulasi patogen mengindikasikan adanya peningkatan atau induksi ketahanan tanaman terhadap penyakit.Kata Kunci: Mikroba antagonis, Trichoderma harzianum, Cara aplikasi, Induksi ketahanan

Evaluation of tomato genotypes for early blight disease resistance caused by Alternaria solani in Pakistan

2019 ◽  
Vol 101 (4) ◽  
pp. 1159-1170
Author(s):  
Khalid Pervaiz Akhtar ◽  
Najeeb Ullah ◽  
Muhammad Yussouf Saleem ◽  
Qumer Iqbal ◽  
Muhammad Asghar ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Early Blight ◽  
Alternaria Solani ◽  
Blight Disease ◽  
Tomato Genotypes

scholarly journals Inheritance of Resistance to Early Blight Disease in Tetraploid × Diploid Crosses of Potatoes

HortScience ◽  
1990 ◽  
Vol 25 (2) ◽  
pp. 224-226 ◽  
Author(s):  
A.B. Herriott ◽  
F.L. Haynes ◽  
P.B. Shoemaker
Keyword(s):  
Partial Correlation ◽  
Early Blight ◽  
Alternaria Solani ◽  
Inheritance Of Resistance ◽  
Narrow Sense ◽  
Narrow Sense Heritability ◽  
Breeding Lines ◽  
Blight Disease ◽  
Different Levels ◽  
Partial Correlation Coefficient

Heritability of resistance to early blight disease in potatoes (Solarium tuberosum L.) incited by Alternaria solani (En. & Martin) Ser. was estimated in tetraploid × diploid crosses. Susceptible tetraploid cultivars and breeding lines were the female parents. Diploids that produced a high proportion of first-division restitution (FDR) gametes and possessed different levels of early blight resistance were the male parents. Tubers from seedlings that resulted from the tetraploid × diploid crosses were planted in a field and artificially inoculated with spores of Alternaria solani. Resistance was measured as the slope (r) of the regression of the logit of the percent defoliation of each plant vs. time. Higher r values indicated lower resistance. Mean r values ranged from 0.123 to 0.157 for the tetraploid parents, and from 0.054 to 0.116 for the diploid parents. Mean r values for the tetraploid × diploid crosses were intermediate, ranging from 0.077 to 0.143. Narrow-sense heritability (h2) was 0.815. The partial correlation coefficient between r and mean maturity values was – 0.2086.

scholarly journals A Novel Rhizospheric Bacterium, Bacillus Velezensis NKMV-3 as a Biocontrol Agent against Alternaria Leaf Blight in Tomato

2021 ◽  
Author(s):  
Vignesh Murthy ◽  
VedhaHari BodethalaNarayanan ◽  
MubarakAli Davoodbasha ◽  
MadhanShankar ShankarRamakrishanan
Keyword(s):  
Early Blight ◽  
Plant Pathogens ◽  
Alternaria Solani ◽  
Inhibitory Effect ◽  
Rrna Gene ◽  
Bacillus Velezensis ◽  
Bacterium Bacillus ◽  
Blight Disease ◽  
Molecular Sequencing

Abstract A novel strain of Bacillus isolated from rhizosphere has shown to be excellent biocontrol agents against various plant pathogens. In this study, a first report of a Bacillus strain NKMV-3 which effectively controlling Alternaria solani, which cause the Early Blight disease in tomato. Based on the cultural and molecular sequencing of 16S rRNA gene sequence, the identity of the strain was confirmed as Bacillus velezensis NKMV-3. The presence of the lipopeptide which are antibiotic synthesis genes namely Iturin C, Surfactin A, Fengycin B and D were confirmed through gene amplification. In addition, lipopetides was also confirmed through liquid chromatography. The extract showed inhibitory effect against A.solani in-vitro and detached tomato leaf assays. Bacillus velezensis strain NKMV-3 based formulations may provide an effective solution in controlling early blight disease in tomato and other crops.

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