Efficacy and Safety of Some Plant Extracts against Tomato Early Blight Disease Caused by Alternaria solani

2011 ◽  
Vol 10 (3) ◽  
pp. 115-121 ◽  
Author(s):  
A.S. Derbalah ◽  
M.S. El-Mahrouk ◽  
A.B. El-Sayed
Keyword(s):  
Plant Extracts ◽  
Early Blight ◽  
Alternaria Solani ◽  
Efficacy And Safety ◽  
Blight Disease

scholarly journals In vitro antifungal evaluation of various plant extracts against early blight disease (Alternaria solani) of potato

2011 ◽  
Vol 10 (42) ◽  
pp. 8291-8295 ◽  
Author(s):  
Yanar Yusuf ◽  
Gouml kccedil e Ayhan ◽  
Kadioglu Izzet ◽  
Ccedil am Halit ◽  
Whalon Mark
Keyword(s):  
Plant Extracts ◽  
Early Blight ◽  
Alternaria Solani ◽  
Blight Disease

scholarly journals SPATIAL DISTRIBUTION OF EARLY BLIGHT DISEASE ON TOMATO, CLIMATIC FACTORS AND BIOEFFICACY OF PLANT EXTRACTS AGAINST Alternaria solani

2019 ◽  
Vol 18 (6) ◽  
pp. 29-38
Author(s):  
Azhar Hussain ◽  
Shaukat Ali ◽  
Haider Abbas ◽  
Haibat Ali ◽  
Alamdar Hussain ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Disease Management ◽  
Plant Extracts ◽  
Early Blight ◽  
Interpolation Method ◽  
Disease Incidence ◽  
Alternaria Solani ◽  
Growing Season ◽  
Growing Seasons ◽  
Blight Disease

Information on the spatial variability in plant disease is essential for location-based disease management. In the current study, the spatial distribution of tomato early blight disease was ascertained in District Gilgit, GilgitBaltistan, Pakistan. The comprehensive field survey was carried in two growing seasons (2014–2015), whereas in each growing season, 62 tomato fields were surveyed. Based on the distribution of disease, the respective thematic maps (incidence and severity) were prepared using Arc Map 10.1 with spatial analyst function of  Arc GIS software by means of the inverse distance weight (IDW) interpolation method. Results indicate that early blight of tomato is spatially distributed in both growing seasons. However, in the first growing season, the disease incidence ranged from 10.22% to 44.16% and during later season 14.03–49.16%, whereas 5.37–16.40% and 6.52–26.94% severity was recorded. Furthermore, this information indicates that higher disease infestation occurred in 2015 in relation to 2014. This information linked to metrological data (temperature, precipitation and relative humidity), seemingly favored the early blight development during the growing period. Seven botanical extracts were tested against pathogen Alternaria solani at different concentrations (4, 6 and 8%). Results revealed that all tested plant extracts showed antifungal activities. However, at 8% concentration of plant extract, Datura starmonium, Berberis orthobotry, Podophyllum emodi and Uretica dioica exhibited >60%, while Peganum harmala, Artemisia maritima and Capparis spinosa <60% antifungal properties. The information generated due to this study could help the tomato growers regarding disease management and selection of resistant cultivars, improving profitability and food security in the Gilgit region.

scholarly journals Efficacy of Selected Plant Extracts in the Management of Tomato Early Blight Disease Caused by Alternaria solani

2016 ◽  
Vol 11 (1) ◽  
pp. 48-52 ◽  
Author(s):  
Abiodun Joseph ◽  
Efe-Imafidon Akere Ese ◽  
Benson Oluwafemi Ademiluyi ◽  
Patrick Ajibola Aluko
Keyword(s):  
Plant Extracts ◽  
Early Blight ◽  
Alternaria Solani ◽  
Blight Disease

scholarly journals Evaluation of various plant extracts against the early blight disease of tomato plants under greenhouse and field conditions

2012 ◽  
Vol 48 (No. 2) ◽  
pp. 74-79 ◽  
Author(s):  
S.M.A. Nashwa ◽  
K.A.M. Abo-Elyousr
Keyword(s):  
Disease Severity ◽  
Plant Extracts ◽  
Mycelial Growth ◽  
Early Blight ◽  
Field Conditions ◽  
Nerium Oleander ◽  
Tomato Plants ◽  
Infected Control ◽  
Blight Disease

The antimicrobial activity of six plant extracts from Ocimum basilicum (Sweat Basil), Azadirachta indica (Neem), Eucalyptus chamadulonsis (Eucalyptus), Datura stramonium (Jimsonweed), Nerium oleander (Oleander), and Allium sativum (Garlic) was tested for controlling Alternaria solani in vitro and in vivo. In in vitro study the leaf extracts of D. stramonium, A. indica, and A. sativum at 5% concentration caused the highest reduction of mycelial growth of A. solani (44.4, 43.3 and 42.2%, respectively), while O. basilicum at 1% and 5% concentration and N. oleander at 5% concentration caused the lowest inhibition of mycelial growth of the pathogen. In greenhouse experiments the highest reduction of disease severity was achieved by the extracts of A. sativum at 5% concentration and D. stramonium at 1% and 5% concentration. The greatest reduction of disease severity was achieved by A. sativum at 5% concentration and the smallest reduction was obtained when tomato plants were treated with O. basilicum at 1% and 5% concentration (46.1 and 45.2 %, respectively). D. stramonium and A. sativum at 5% concentration increased the fruit yield by 76.2% and 66.7% compared to the infected control. All treatments with plant extracts significantly reduced the early blight disease as well as increased the yield of tomato compared to the infected control under field conditions.

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.

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