Trichoderma harzianum mediated suppression of red rot (Colletotrichum falcatum Went) in Sugarcane

2016 ◽  
Vol 1 (01) ◽  
pp. 62-64
Author(s):  
Ram Ji Lal ◽  
Deeksha Joshi ◽  
Rashmi Nigam
Keyword(s):  
Field Experiment ◽  
Trichoderma Harzianum ◽  
Red Rot ◽  
Colletotrichum Falcatum ◽  
Soil Application ◽  
Major Constraint ◽  
Highly Effective ◽  
Moderately Resistant ◽  
The Impact

Red rot of sugarcane caused by the pathogen Colletotrichum falcatum Went is a major constraint in the profitable cultivation of sugarcane in India. A field experiment was conducted to assess the impact of soil application of Trichoderma multiplied culture (TMC) @220 kg/ ha alone or in combination with MHAT on red rot induced bud mortality in sugarcane. Setts of genotype CoS 96268 (moderately resistant) and CoLk 7701 (susceptible), pre inoculated with C. falcatum, were subjected to MHAT, TMC application or combination of both and planted. The findings of the study indicated that sett treatment with MHAT alone or in combination with TMC soil application was highly effective in suppressing C. falcatum induced bud mortality.

scholarly journals Screening sugarcane somaclones and their parent varieties against red rot (Colletotrichum falcatum) and assessment of Variability by RAPD and SSR markers

2016 ◽  
Vol 13 (2) ◽  
pp. 173-182 ◽  
Author(s):  
Kuasha Mahmud ◽  
KM Nasiruddin ◽  
MA Hossain ◽  
L Hassan
Keyword(s):  
Ssr Markers ◽  
Cluster Formation ◽  
Red Rot ◽  
Colletotrichum Falcatum ◽  
Similar Reaction ◽  
Red Rot Disease ◽  
Sugarcane Varieties ◽  
Resistant Reaction ◽  
Rot Disease ◽  
Moderately Resistant

The experiment was conducted to find out red rot disease causing pathogenic reactions of somaclones (R0) and their respective parents at BSRI farm in the cropping season 2011-2012. A total number of sugarcane genotypes 24 including 4 sugarcane varieties viz. Isd 37, Isd 38, Isd 39 and also Isd 40 were inoculated to screen red rot resistant levels (R = Resistant, MR = Moderately Resistant) to susceptible levels (S = Susceptible, MS = Moderately Susceptible, HS = Highly Susceptible) after 7 months of planting. As a result, Isd 37 variety (source/parent) and its somaclones CC–37–12 and CC–37–86 were found to be resistant while 7 somaclones showed moderately resistant reaction. Furthermore, somaclones of Isd 38 variety viz. CC–38–2 as moderately resistant, CC–38–10 as moderately susceptible and also CC–11(38)–8 as susceptible reaction were recorded while Isd 38 variety showed resistant reaction. On the other hand, Isd 39 and Isd 40 source varieties with their somaclones were found as resistant reaction against red rot pathogen. Some somaclones showed different reaction from their source varieties such as moderately resistant somaclones were obtained from resistant source variety Isd 37 while somaclones CC–38–2 as moderately resistant, CC–38–10 as moderately susceptible and somaclone CC–38–8 as susceptible were obtained from resistant source variety Isd 38 against red rot pathogens respectively. Besides, some somaclones showed similar reaction from their resistant source varieties Isd 37, Isd 39 and also Isd 40. It revealed that reaction against red rot pathogen, induced somaclones showed variation with their source varieties. Red rot resistance somaclones were isolated and assessed for the presence of variability through RAPD and SSR markers. Cluster and sub cluster formation verified the presence of variability in the red rot resistance somaclones with respect to the parent.SAARC J. Agri., 13(2): 173-182 (2015)

scholarly journals Resistance to Red Rot Disease (Colletotrichum falcatum) Varies among Different Germplasm Sources of Sugarcane

2021 ◽  
Vol 25 (02) ◽  
pp. 381-387
Author(s):  
Hafiz Muhammad Walayat Ali Khan
Keyword(s):  
Screening Test ◽  
Development Program ◽  
Red Rot ◽  
Colletotrichum Falcatum ◽  
Red Rot Disease ◽  
Sugarcane Varieties ◽  
Varietal Development ◽  
Sugarcane Germplasm ◽  
Rot Disease ◽  
Moderately Resistant

Resistance of sugarcane varieties to red rot disease is essential for their successful commercial cultivation in Pakistan. Evaluation of sugarcane germplasm for red rot resistance is a basic component of the varietal development system in Punjab. The studies on varietal screening against red rot disease of exotic sugarcane germplasm were conducted at the research farm of the Sugarcane Research Institute, Faisalabad from 2008–2009 to 2010–2011. The screening test was carried out at different varietal development stages including sugarcane nursery-2, nursery-3, semi-final varietal trial, final varietal trial and National Uniform Yield Trial by using plug method of inoculation. In three years, 724 sugarcane genotypes were examined in screening test against red rot disease, which were developed from germplasm (fuzz), imported from different sugarcane breeding organizations of the world. Fuzz is a true seed of sugarcane used to develop new sugarcane variety(ies) through repeated selection in any varietal development program. The results of three years experimentation revealed that 425 genotypes were resistant, 141 moderately resistant, 48 moderately susceptible and 110 susceptible to red rot disease. It was also concluded that sugarcane germplasm belongs to the USA, proved to be superior for resistance to red rot disease with 91% genotypes followed by Brazil and Australia with 86 and 68% genotypes, respectively, which were classified in resistant and moderately resistant category. © 2021 Friends Science Publishers

scholarly journals Three doors anomaly, “should I stay, or should I go”: an artefactual field experiment

2021 ◽  
Author(s):  
Andrea Morone ◽  
Rocco Caferra ◽  
Alessia Casamassima ◽  
Alessandro Cascavilla ◽  
Paola Tiranzoni
Keyword(s):  
Field Experiment ◽  
Experimental Evidence ◽  
Bayesian Updating ◽  
Anomalous Behavior ◽  
Status Quo ◽  
Experimental Results ◽  
Illusion Of Control ◽  
Optimal Decision ◽  
Status Quo Bias ◽  
The Impact

AbstractThis work aims to identify and quantify the biases behind the anomalous behavior of people when they deal with the Three Doors dilemma, which is a really simple but counterintuitive game. Carrying out an artefactual field experiment and proposing eight different treatments to isolate the anomalies, we provide new interesting experimental evidence on the reasons why subjects fail to take the optimal decision. According to the experimental results, we are able to quantify the size and the impact of three main biases that explain the anomalous behavior of participants: Bayesian updating, illusion of control and status quo bias.

scholarly journals Efficacy and Application Strategies for Propiconazole as a New Postharvest Fungicide for Managing Sour Rot and Green Mold of Citrus Fruit

Plant Disease ◽  
2012 ◽  
Vol 96 (2) ◽  
pp. 235-242 ◽  
Author(s):  
A. H. McKay ◽  
H. Förster ◽  
J. E. Adaskaveg
Keyword(s):  
Management Practices ◽  
Citrus Fruit ◽  
The United States ◽  
Optimal Time ◽  
Inoculum Concentration ◽  
Time Of Application ◽  
Sour Rot ◽  
Green Mold ◽  
Highly Effective ◽  
Moderately Resistant

Few postharvest treatments are available for managing sour rot of citrus caused by Galactomyces citri-aurantii and they are generally not very effective. The demethylation-inhibiting (DMI) triazole fungicides propiconazole and cyproconazole were found to be highly effective and more efficacious than other DMIs evaluated, such as metconazole and tebuconazole, in reducing postharvest sour rot of citrus. Additional studies were conducted with propiconazole as a postharvest treatment because it has favorable toxicological characteristics for food crop registration in the United States and the registrant supports a worldwide registration. Regression and covariance analyses were performed to determine optimal time of application after inoculation and fungicide rate. In laboratory studies, decay incidence increased when propiconazole applications were delayed from 8 to 24 h (lemon) or 18 to 42 h (grapefruit) after inoculation. Effective rates of the fungicide were 64 to 512 μg/ml and were dependent on inoculum concentration of the sour rot pathogen and on the type of citrus fruit. Propiconazole was found to be compatible with sodium hypochlorite at 100 μg/ml and 1 to 3% sodium bicarbonate without loss of efficacy for decay control on lemon. The addition of hydrogen peroxide/peroxyacetic acid at 80 μg/ml slightly decreased the effectiveness of propiconazole. Heated (48°C) solutions of propiconazole did not significantly improve the efficacy compared with solutions at 22°C. In experimental packing-line studies, aqueous in-line drenches applied alone or followed by applications of the fungicide in storage or packing fruit coatings were highly effective, reducing sour rot to between 0 and 1.2% compared with 83.8% decay incidence in the control when treatments were made up to 16 h after inoculation. When the fungicide was applied in either fruit coating, decay was only reduced to 49.1 to 57.1% incidence. Tank mixtures of propiconazole with the citrus postharvest fungicides fludioxonil and azoxystrobin were highly effective in reducing green mold caused by isolates of Penicillium digitatum sensitive or moderately resistant to imazalil and sour rot. Propiconazole will be an important postharvest fungicide for managing sour rot of citrus and potentially can be integrated into current management practices to reduce postharvest crop losses caused by DMI-sensitive isolates of P. digitatum.

Differential Regulation of Defense-Related Gene Expression in Response to Red Rot Pathogen Colletotrichum falcatum Infection in Sugarcane

2013 ◽  
Vol 171 (2) ◽  
pp. 488-503 ◽  
Author(s):  
P. T. Prathima ◽  
M. Raveendran ◽  
K. K. Kumar ◽  
P. R. Rahul ◽  
V. Ganesh Kumar ◽  
...  
Keyword(s):  
Gene Expression ◽  
Differential Regulation ◽  
Red Rot ◽  
Colletotrichum Falcatum ◽  
Related Gene ◽  
Defense Related Gene

Molecular and pathological characterization of isolates of Colletotrichum falcatum Went. causing red rot in sugarcane

2021 ◽  
Vol 58 (2) ◽  
pp. 224-231
Author(s):  
Anuradha ◽  
Lenika Kashyap ◽  
Rajinder Kumar ◽  
Paramjit Singh
Keyword(s):  
Red Rot ◽  
Colletotrichum Falcatum
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