scholarly journals IN VITRO EVALUATION OF DIFFERENT LOCALLY AVAILABLE PRESERVATIVES AGAINST THE FUNGUS CAUSING TOMATO FRUIT ROT DISEASE

2021 ◽  
Vol 11 (3) ◽  
Keyword(s):  
Tomato Fruit ◽  
Fruit Rot ◽  
In Vitro Evaluation ◽  
Rot Disease

scholarly journals Isolatation and Identification of the Fungi Causing Tomato Fruit Rot Disease in the Vicinity of Tandojam, Sindh

2020 ◽  
Author(s):  
S. Nizamani ◽  
A. A. Khaskheli ◽  
A. M. Jiskani ◽  
S. A. Khaskheli ◽  
A. J. Khaskheli ◽  
...  
Keyword(s):  
Tomato Fruit ◽  
Aerial Mycelium ◽  
Alternaria Solani ◽  
Economic Loss ◽  
Geotrichum Candidum ◽  
Fruit Rot ◽  
Post Harvest ◽  
Standard Procedures ◽  
Fruit Samples ◽  
Rot Disease

Background: The post-harvest tomato fruit rot disease is common threat to the tomato fruit, causing huge economic loss as revealed by (GOP, 2018). The present study was conducted for isolatation and identification of causative agent of tomato fruit rot in order to formulate the proper management stretegies. Methods: Study was conducted in three phases. Phase one included collection of tomato fruit samples from vicinity of Tandojam. In phase two pathogens were isolated from the samples at laboratory, while in the phase three pathogens were identified using standard procedures. Result: The experimental results indicated Alternaria solani as the main cause of post-harvest tomato fruit rot. The symptoms observed were presence of brown to black rot lesions on tomato fruits with distinct rings ranging from small pin-heads to whole surface of fruit. A total of six different fungi viz., Alternaria alternata, Aspergillus niger, Alternaria solani, Geotrichum candidum, Fusarium oxysporum and Rhizopus stolonifer were found to be associated with post harvest tomato rot. Significantly higher infection was recorded for A. solani (53.667%) followed by A. niger (16.333%) and G. candidum (13.00%). The lowest infection percentage was observed for F. oxysporum (2.333%), followed by A. alternata (4.00%) and R. stolonifer (9.00%). A. solani produced aerial mycelium with yellowish to reddish diffusible pigments. A. niger cultures were typically black and colonies were initially whitish to yellow and later became brown to black in colour. G. candidum produced white and nonaerial colonies. F. oxysporum produced circular, aerial mycelium initially white, later changed to light pink. R. stolonifer produced whitish to grey fuzzy colonies.

Identifying and Characterizing Summer Diseases on ‘Babygold’ Peach in South Carolina

2006 ◽  
Vol 7 (1) ◽  
pp. 30 ◽  
Author(s):  
Guido Schnabel ◽  
Wenxuan Chai ◽  
Kerik D. Cox
Keyword(s):  
South Carolina ◽  
Dna Analysis ◽  
Management Strategies ◽  
Disease Outbreaks ◽  
Geotrichum Candidum ◽  
Fruit Rot ◽  
Colletotrichum Acutatum ◽  
Significant Yield ◽  
Rot Disease

Summer diseases can cause significant yield losses in processing peach varieties, such as the ‘Babygold’ lines. In this study we identified and characterized the pathogens responsible for disease outbreaks in two orchards (PH and JC) located in the northern ‘Piedmont’ area of South Carolina. Three pathogens, Geotrichum candidum, Colletotrichum acutatum, and Botryosphaeria dothidea, the causal agents of sour rot, anthracnose, and Botryosphaeria fruit rot disease respectively, were identified on fruit from orchard PH using symptomology, culture and spore morphology, and ribosomal DNA analysis. G. candidum and C. acutatum were also isolated from symptomatic fruit from orchard JC. The QoI fungicide azoxystrobin and a mixture of pyraclostrobin and boscalid were evaluated for their in vitro efficacy against five isolates of each of the three pathogens to investigate their possible usefulness in designing management strategies. Azoxystrobin inhibited mycelial growth of C. acutatum isolates (EC50 values of 0.01 to 0.55 mg/liter) but was ineffective against mycelium of G. candidum and B. dothidea isolates (EC50 values >300 mg/liter). The pyraclostrobin-boscalid mixture was highly effective against mycelium of C. acutatum (EC50 values of 0.01 to 0.05 mg/liter) and B. dothidea isolates (EC50 values of 0.02 to 0.03 mg/liter), but only marginally effective against mycelium of G. candidum (EC50 values 15.79 to 39.03 mg/liter). This study provides a diagnostic guide of pathogens that can cause summer diseases on ‘Babygold’ peaches and reports their in vitro sensitivity to registered respiration inhibitor fungicides. Accepted for publication 23 December 2005. Published 1 March 2006.

scholarly journals Control of Sphaeropsis Rot in Stored Apple Fruit Caused by Sphaeropsis pyriputrescens with Postharvest Fungicides

Plant Disease ◽  
2011 ◽  
Vol 95 (9) ◽  
pp. 1075-1079 ◽  
Author(s):  
C. L. Xiao ◽  
Y. K. Kim ◽  
R. J. Boal
Keyword(s):  
Mycelial Growth ◽  
Disease Incidence ◽  
Apple Fruit ◽  
Conidial Germination ◽  
Fruit Rot ◽  
Mitigation Measures ◽  
The Mean ◽  
Rot Disease ◽  
Sphaeropsis Rot

Sphaeropsis rot caused by Sphaeropsis pyriputrescens is a recently reported postharvest fruit rot disease of apple grown in Washington State. The objective of this study was to develop chemical-based mitigation measures for Sphaeropsis rot in stored apple fruit. To determine in vitro sensitivity of S. pyriputrescens to the three registered postharvest fungicides thiabendazole, fludioxonil, and pyrimethanil, 30 isolates of S. pyriputrescens obtained from various sources were tested for mycelial growth and conidial germination on fungicide-amended media. Golden Delicious apple fruit were inoculated with the pathogen in the orchard at 2 or 5 weeks before harvest. After harvest, fruit were either nontreated or dipped in thiabendazole, fludioxonil, or pyrimethanil solutions, stored at 0°C, and monitored for decay development for up to 9 months after harvest. The mean effective concentration of a fungicide that inhibits mycelial growth or spore germination by 50% relative to the nonamended control (EC50) values of thiabendazole, fludioxonil, and pyrimethanil on mycelial growth were 0.791, 0.0005, and 2.829 μg/ml, respectively. Fludioxonil and pyrimethanil also were effective in inhibiting conidial germination of the fungus with EC50 values of 0.02 μg/ml for fludioxonil and 5.626 μg/ml for pyrimethanil. All three postharvest fungicides applied at label rates immediately after harvest were equally effective in controlling Sphaeropsis rot in stored apple fruit, reducing disease incidence by 92 to 100% compared with the nontreated control. The results indicated that Sphaeropsis rot may be effectively controlled by the currently registered postharvest fungicides thiabendazole, fludioxonil, and pyrimethanil.

scholarly journals In vitro Evaluation of Fungicides, Botanicles and Bio-Agents against Alternaria alternata Causal Agent of Fruit Rot of Brinjal

2017 ◽  
Vol 6 (5) ◽  
pp. 495-504 ◽  
Author(s):  
Sanjeev P. Jakatimath ◽  
R.K. Mesta ◽  
I.B. Biradar ◽  
Sadanand K. Mushrif ◽  
P.S. Ajjappalavar
Keyword(s):  
Alternaria Alternata ◽  
Causal Agent ◽  
Fruit Rot ◽  
In Vitro Evaluation

scholarly journals In Vitro Control of Tomato (Solanum lycopersicon L.) Fruit Rot Caused by Fungi Using Two Plant Extracts

2016 ◽  
Vol 52 ◽  
pp. 19-27 ◽  
Author(s):  
Edward Ntui Okey ◽  
Patrick Ishoro Akwaji ◽  
Juliet Bassey Akpan ◽  
Etim Johnson Umana ◽  
Glory Akpan Bassey
Keyword(s):  
Fungal Pathogens ◽  
Tomato Fruit ◽  
Fruit Rot ◽  
Leaf Extracts ◽  
Methanolic Extracts ◽  
Mycelia Growth ◽  
Infected Tomato ◽  
The Media ◽  
Fresh Tomato

The inhibitory properties of the ethanolic and methanolic leaf extracts of Vernoniaamygdalina and Colaacuminata on the fungal pathogens isolated from infected tomato fruits were investigated. The pathogens were Fusariummoniliformes and Rhizopusstolonifer. Various concentrations of the extracts ranging from 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100% were separately added to PDA media. The fungal pathogens were separately inoculated into the media and incubated for seven days. Antifungal effects of these extracts on the mycelia growth of the pathogens were significant at P<0.05 for all treatments at higher concentrations. At 10-50% concentration, ethanolic and methanolic extracts of Vernoniaamygdalina and Cola acuminata had no significant effect on the mycelia growth of Fusariummoniliformes and Rhizopusstolonifer after seven days observation period. At 60-100% concentrations, the two pathogens were completely inhibited by ethanolic extracts of Vernoniaamygdalina and Cola acuminata. Methanolic extracts of Vernoniaamygdalina and Cola acuminata inhibited completely Fusariummoniliformes and Rhizopusstolonifer at 80-100% concentrations. The in vitro inhibitory effects of these extracts at higher concentrations indicated that they can be used for the control of tomato fruit rot. It may be necessary to use them in prolonging the shelf-life of fresh tomato fruit and some other fruits.

scholarly journals In vitro Evaluation of Fungicides, Botanicals and Bio-agents against Phomopsis vexans, the Causal Agent of Fruit Rot of Brinjal

2017 ◽  
Vol 11 (1) ◽  
pp. 229-235
Author(s):  
Sanjeev Jakatimath ◽  
RK Mesta ◽  
Sadanand Mushrif ◽  
IB Biradar ◽  
PS Ajjappalavar
Keyword(s):  
Causal Agent ◽  
Fruit Rot ◽  
In Vitro Evaluation ◽  
Phomopsis Vexans
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