Screening tomato genotypes for resistance to early blight and American serpentine leafminer

2019 ◽  
Vol 60 (3) ◽  
pp. 427-433
Author(s):  
Suresh Reddy Yerasu ◽  
Loganathan Murugan ◽  
Jaydeep Halder ◽  
H. C. Prasanna ◽  
Arpita Singh ◽  
...  
Keyword(s):  
Early Blight ◽  
Serpentine Leafminer ◽  
Tomato Genotypes

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 Evaluation of tomato genotypes for tolerance to major diseases in Uganda

1970 ◽  
Vol 29 (2) ◽  
pp. 241-258
Author(s):  
I. Ramathani ◽  
G. Ddamulira ◽  
A. Kangire ◽  
P. Wasswa ◽  
A. Tusiime
Keyword(s):  
Late Blight ◽  
Bacterial Wilt ◽  
Early Blight ◽  
Bacterial Speck ◽  
Solanum Lycopersicum L ◽  
Genetic Base ◽  
National Performance ◽  
Tomato Diseases ◽  
Tomato Bacterial Wilt ◽  
Tomato Genotypes

Tomato (Solanum lycopersicum L.) is a priority vegetable in Uganda, but due to its limited genetic base, its cultivated types are prone to a variety of diseases. The objective of this study was to evaluate new tomato genotypes for resistance to major tomato diseases under hotspot conditions in Uganda. Fourty-five tomato genotypes were evaluated for reactions to tomato bacterial wilt, tomato bacterial speck, early blight and late blight. The study was conducted for two rainy seasons in 2019, at the National Crops Resources Research Institute, Namulonge in Uganda. Data for severity and incidence were collected at two-week intervals after transplanting. Twelve genotypes (Nouvella F1, Rambo F1, Commando F1, AVTO1315, AVTO922, AVTO1701, AVTO1219, AVTO1464, MT56, ADV1287A, Pruna and Vega) exhibited high levels of tolerance to bacterial wilt; while bacterial speck presented mild symptoms majorly seen on Vega, Zodiac and AVTO9802. Rhino, AVTO1418, AVTO1314, Eureka, Roma VFN, MT56, Pinktop, Assila F1, Money-maker, AVTO0922 and AVTO1464 were the least affected by early blight; while AVTO1219, AVTO1701, ADV12021, ADV12076 and ADV1287A expressed low AUDPC values for late blight. Overall, AVTO1315 was the best yielder (30.8 metric tonnes ha-1), followed by AVTO0301 (29.0 t ha-1) and Nouvella F1 (26.1 t ha-1). Among the tomato genotypes evaluated, we recommend AVTO1701, AVTO0922, AVTO1464, AVTO0301 AVTO1315, AVTO1219, Pruna, Vega, ADV1287A and MT56 for the national performance trials.

scholarly journals Impact of Alternaria solani (Early blight) on cultivated tomato (Solanum lycopersicum L.) in North-eastern region of India and identification of early blight disease resistant tomato genotypes

2015 ◽  
Vol 7 (2) ◽  
pp. 672-680
Author(s):  
Khaidem Malemnganba Meitei ◽  
G.C. Bora ◽  
Senjam Jinus Singh ◽  
Anjan Kumar Sinha
Keyword(s):  
Solanum Lycopersicum ◽  
Early Blight ◽  
Disease Incidence ◽  
Fruit Weight ◽  
High Yield ◽  
Eastern Region ◽  
Solanum Lycopersicum L ◽  
North Eastern ◽  
Blight Disease ◽  
Tomato Genotypes

The present investigation was carried out to screen genotypes for resistance to Early blight disease of tomato (Solanum lycopersicum L.) of North Eastern region of India. Field trial was conducted in the Experimental Farm, Department of Horticulture, Assam Agricultural University, Jorhat during the years 2012-13 and 2013-14 consecutively. The disease severity of tomato genotypes was assessed by 0-5 points scale, percent Disease Incidence (PDI). Of the total materials screened, Sel-35 (TLBRH-6 X Konbilahi) and Sel-19 (TLBRH-6 X Konbilahi) were highly resistant, 7 were resistant, 14 were moderately resistant, 16 were susceptible and 6 were highly susceptible under field condition after inoculation during both years. The genotype having high yield and resistant to early blight was 10/TOLCVRES-3. The genotypes resistant to early blight but having low yield (Sel-35, Sel-19, Sel-9 and Sel-16) may be utilized in future breeding programme for improving yield through selection for higher fruit weight and fruit diameter. Alternatively, they may be used as parents in hybridization or backcrossing programme in order to transfer the gene for resistance to early blight to already adapted high yield varieties.

scholarly journals Marketable Yields of Fresh-market Tomatoes Grown in Plastic and Hairy Vetch Mulches

HortScience ◽  
2002 ◽  
Vol 37 (6) ◽  
pp. 878-881 ◽  
Author(s):  
Aref A. Abdul-Baki ◽  
John R. Teasdale ◽  
Robert W. Goth ◽  
Kathleen G. Haynes
Keyword(s):  
Cover Crops ◽  
Early Blight ◽  
Agricultural Research ◽  
Conventional Tillage ◽  
Hairy Vetch ◽  
Plastic Mulch ◽  
Fresh Market ◽  
No Till ◽  
Nitrogen Inputs ◽  
Tomato Genotypes

The use of mulches in vegetable production is undergoing a radical change away from high-input, nonrenewable resources, such as plastic, to the use of high-residue organic mulches from cover crops. The purpose of this study was to compare the marketable yield of various fresh-market tomato genotypes when grown under plastic and hairy vetch mulches. In 1996 and 1997, 12 fresh-market tomato genotypes were evaluated for yield on the North Farm of the Beltsville Agricultural Research Center (BARC), MD in a randomized split-plot design. Tomatoes were grown in conventional tillage plastic mulch (PM) and no-till hairy vetch mulch (HVM). Early blight, caused by Alternaria solani Sor., developed naturally in the plots both years and was recorded over time. All 12 genotypes were susceptible to early blight. Area under the disease progress curve (AUDPC) was calculated for each plot. AUDPC was similar both years. However, the year × mulch and year × mulch × genotype interactions were significant for AUDPC. Adjusting yields for AUDPC had a minimal effect on the data. Overall, yields were similar in PM and HVM both before and after adjusting for AUDPC. However, the mulch × genotype interaction was significant. The yield of eight of the genotypes was significantly higher in the HVM than in the PM system both years, ranging from 12% to 57% higher in 1996 and 10% to 48% higher in 1997. There was no yield difference for one genotype in HVM as compared to PM. The yield in the remaining three genotypes was either higher under HVM than PM or there was no difference. As yields from the HVM system are greater than or equal to yields in the PM system, soil compaction is reduced and nitrogen inputs are lower. The no-till HVM system is at least as good, and often better, than the conventional tillage PM system.

Resistance of some tomato genotypes to early blight (Alternaria solani)

2016 ◽  
pp. 151-156
Author(s):  
S. Medić-Pap ◽  
A. (Ana) Takač ◽  
D. Danojević ◽  
A. (Adam) Takač ◽  
S. Maširević ◽  
...  
Keyword(s):  
Early Blight ◽  
Alternaria Solani ◽  
Tomato Genotypes

SCREENING OF TOMATO GENOTYPES AGAINST EARLY BLIGHT (ALTERNARIA SOLANI) BY DETACHED LEAF METHOD

2011 ◽  
pp. 465-468
Author(s):  
M.R. Lohith ◽  
K. Chandrashekar Reddy ◽  
C. Venkata Ramana ◽  
P. Venkata Rao ◽  
K. Ravendra Reddy ◽  
...  
Keyword(s):  
Early Blight ◽  
Alternaria Solani ◽  
Detached Leaf ◽  
Tomato Genotypes

scholarly journals Characterization of tomato accessions for resistance to early blight

2011 ◽  
Vol 11 (2) ◽  
pp. 174-180 ◽  
Author(s):  
José Fernando Jurca Grigolli ◽  
Mirian Maristela Kubota ◽  
Daniel Pedrosa Alves ◽  
Gabriel Belfort Rodrigues ◽  
Carine Rezende Cardoso ◽  
...  
Keyword(s):  
Early Blight ◽  
Block Design ◽  
Research Field ◽  
Diseased Leaf ◽  
Breeding Programs ◽  
Progress Curve ◽  
Randomized Block Design ◽  
Diseased Leaf Area ◽  
Tomato Genotypes

The purpose of this study was to characterize 50 tomato genotypes of the Vegetable Genebank of the Federal University of Viçosa. They were evaluated together with the controls Débora, Fanny and Santa Clara, in a randomized block design with two replications. The experiment was conducted in a research field of the UFV, from February to May 2007. We evaluated the disease severity, which is the percentage of diseased leaf area. The severity values were transformed into area under the disease progress curve (AUDPC), improving the result visualization. The analysis of variance and grouping of AUDPC means by the Scott-Knott test at 5 % significance were performed. The accessions BGH-2081, BGH-2034, BGH-700, BGH-2057, BGH-2035, BGH-2054, BGH-2018, BGH-2065, BGH-2008, and BGH-2032 had a lower mean AUDPC than the controls and are therefore indicated for future breeding programs.

scholarly journals PRODUCTIVE POTENTIAL OF THE CHERRY TOMATO GENOTYPE GROUP BEFORE INFECTION BY Alternaria tomatophila

2017 ◽  
Vol 30 (2) ◽  
pp. 296-302
Author(s):  
HUGO CESAR RODRIGUES MOREIRA CATÃO ◽  
NILZA LIMA PEREIRA SALES ◽  
JOÃO BATISTA DE CAMPOS MENEZES ◽  
FRANCIELE CAIXETA ◽  
CÂNDIDO ALVES COSTA
Keyword(s):  
Early Blight ◽  
Cherry Tomato ◽  
Sources Of Resistance ◽  
Disease Progress Curve ◽  
Disease Progress ◽  
Progress Curve ◽  
Productive Potential ◽  
Lower Severity ◽  
Tomato Genotype ◽  
Tomato Genotypes

ABSTRACT Early blight (caused by Alternaria tomatophila) is a major disease of tomato with no resistant cultivars. Thus, it is necessary to identify sources of resistance and productive genotypes for the development of new cultivars. Therefore, this study aimed to evaluate the productive potential of cherry tomato genotypes grown in the summer / fall, the severity of early blight on leaves and the incidence of disease in fruits. The treatments consisted of Carolina tomato genotypes, Cereja Vermelho, CH 152 and CLN1561A. The experimental design consisted of randomized blocks with six replications, and the experimental plot had 16 plants. The following characteristics were evaluated: area under the disease progress curve (AUDPC), average number of microinjuries on the fruits (MF), average number of fruits per bunch (NFC), average number of bunches per plant (NCP), average number of fruits per plant (NFP), average yield, number of fruits with incidence of early blight per plant (NFI) and the severity of early blight in leaves (%). The cherry tomato genotype CH152 showed tolerance to early blight with a smaller area under the disease progress curve, lower severity and fruits with incidence of A. tomatophila were not observed in this genotype. The CH152 had the highest number of fruits per bunch, greater number of bunches per plant, higher number of fruits per plant and higher productivity. This line has great potential of being integrated into breeding programs.

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