1,720,977 research outputs found
Control of Root Rot Diseases of Tomato Plants Caused by Fusarium solani, Rhizoctonia solani and Sclerotium rolfsii Using Different Chemical Plant Resistance Inducers
No full textRoot rots of tomato plants caused by Rhizoctonia solani, Fusarium solani and Sclerotium rolfsii are
serious diseases leading to delayed growth and subsequent death of severely infected plants. Effect of
some chemical inducers such as potassium salts, salicylic acid and sorbic acid on control of root rot
pathogens and their impact on growth, quantity and quality parameters of tomato cv. Super Strain B
were investigated. All the tested chemical inducers significantly reduced severity of root rots under
greenhouse and field conditions. Potassium salts based-treatments, followed by salicylic acid, were the
most effective in decreasing incidence of root rots induced by all tested pathogens. However, sorbic
acid was found to be the least effective treatment. In field trials, the highest reductions of root rot
incidence and disease severity were recorded on tomato plants treated with potassium sorbate used at
7.5% and dipotassium hydrogen phosphate (K2HPO4
) 400 mM followed by salicylic acid 100 mM
treatment. Disease incidence and severity were reduced by 65.4 and 62.5% in 2012, and by 63.2 and
53.8% in 2013 cropping seasons, respectively. Application of potassium salts followed by salicylic acid
was the most efficient for the increase of growth parameters, yield and quality of tomato fruits while
compared to control. Therefore, it could be suggested that application of plant chemical resistance
inducers could be commercially used for controlling tomato root rot diseases and increasing both
quality and quantity of tomato since they are safe, less expensive and effective against these diseases
even under field conditions
Variation in the composition of the microbial community in the rhizosphere of potato plants depending on cropping season, cultivar type, and plant development stage
No full textAbstracts book of the 13th Arab Congress of Plant Protection, Hammamet, Tunisia, 16-21 October 2022
No full textThis Publication is an Abstracts book of the 13th Arab Congress of Plant Protection (13th ACPP), organized by the Arab Society of Plant Protection (ASPP) in collaboration with the Ministry of Agriculture, Water Resources and Fisheries of Tunisia, represented by the National Institute of Agronomic Research of Tunisia (INRAT), held during the period 16-21 October 2022 in Hammamet, Tunisia.
The abstracts book contains 371 abstracts (Economic entomology, fungal diseases, bacterial diseases, viral diseases, phytoplasma, nematodes, weeds, chemical pesticides, plant extracts, IPM, biological control, climate change & plant protection, pest surveillance, soil-borne pathogens, food security & plant protection, and other) presented by scientists and graduate students from CWANA Countries, USA and Europe. In addition to the abstracts presented by scientists from the International Organizations such as the Food and Agriculture Organization of the United Nations (FAO), the International Center for Wheat and Maize (CIMMYT), the International Center for Agricultural Research in the Dry Areas (ICARDA), the International Centre for Advanced Mediterranean Agronomic Studies (CIHEAM), the European Plant Protection Organization (EPPO), The Mediterranean Phytopathological Union (MPU), the Arab Center for the Studies of Arid Zones and Dry Lands (ACSAD), the Arab Organization for Agricultural Development (AOAD), and the Islamic Organization for Food Security (IOFS).
The abstracts book was Edited by “Safaa G. Kumari, Khaled Makkouk, Mejda Daami-Remadi, Asma Najar, Hajer Ben Ghanem, Nader Asaad, Mohammad Kassem and Abdul Rahman Moukahel”; and published as a special issue of the Arab Journal of Plant Protection (AJPP), Volume 40, October 2022. 127 Pages (English) and 159 Pages (Arabic)
Exploring the Beneficial Endophytic Microorganisms for Plant Growth Promotion and Crop Protection: Elucidation of Some Bioactive Secondary Metabolites Involved in Both Effects
No full textAbstracts book of the 13th Arab Congress of Plant Protection, Hammamet, Tunisia, 16-21 October 2022
No full textThis Publication is an Abstracts book of the 13th Arab Congress of Plant Protection (13th ACPP), organized by the Arab Society of Plant Protection (ASPP) in collaboration with the Ministry of Agriculture, Water Resources and Fisheries of Tunisia, represented by the National Institute of Agronomic Research of Tunisia (INRAT), held during the period 16-21 October 2022 in Hammamet, Tunisia.
The abstracts book contains 371 abstracts (Economic entomology, fungal diseases, bacterial diseases, viral diseases, phytoplasma, nematodes, weeds, chemical pesticides, plant extracts, IPM, biological control, climate change & plant protection, pest surveillance, soil-borne pathogens, food security & plant protection, and other) presented by scientists and graduate students from CWANA Countries, USA and Europe. In addition to the abstracts presented by scientists from the International Organizations such as the Food and Agriculture Organization of the United Nations (FAO), the International Center for Wheat and Maize (CIMMYT), the International Center for Agricultural Research in the Dry Areas (ICARDA), the International Centre for Advanced Mediterranean Agronomic Studies (CIHEAM), the European Plant Protection Organization (EPPO), The Mediterranean Phytopathological Union (MPU), the Arab Center for the Studies of Arid Zones and Dry Lands (ACSAD), the Arab Organization for Agricultural Development (AOAD), and the Islamic Organization for Food Security (IOFS).
The abstracts book was Edited by “Safaa G. Kumari, Khaled Makkouk, Mejda Daami-Remadi, Asma Najar, Hajer Ben Ghanem, Nader Asaad, Mohammad Kassem and Abdul Rahman Moukahel”; and published as a special issue of the Arab Journal of Plant Protection (AJPP), Volume 40, October 2022. 127 Pages (English) and 159 Pages (Arabic)
Antifungal Activity of Culture Filtrates and Organic Extracts of Aspergillus spp. against Pythium ultimum
No full textCulture filtrates, chloroform and ethyl acetate extracts of nine isolates of Aspergillus spp. (A. niger, A.
terreus, A. flavus and Aspergillus sp.), isolated from soil and compost, were tested for antifungal
activity against Pythium ultimum the causal agent of the potato Pythium leak. Culture filtrates showed a
significant antifungal activity at the different tested concentrations. Total inhibition of the pathogen
was induced by the filtrate of CH8 of Aspergillus sp., used at 10% (v/v) and those of CH12 (A. niger)
and MC8 (A. terreus), applied at 20% (v/v). Chloroform and ethyl acetate extracts of isolates CH12 of
A. niger, CH2 and MC8 of A. terreus and CH8 of Aspergillus sp., tested at 5% (v/v), had completely
inhibited the in vitro growth of P. ultimum. Tested as tuber treatment, culture filtrates and both organic
extracts significantly reduced Pythium leak severity compared to the inoculated and untreated control
tubers. Rot lesion diameter and average penetration of the pathogen decrease, recorded after 48 h of
incubation at 25°C, induced by the culture filtrates ranged from 71 to 84% and 42 to 85%, respectively.
All chloroform and ethyl acetate extracts had also limited both disease severity parameters by 78 to
84% and 72 to 80%, respectively. This study revealed the presence of bioactive metabolites against P.
ultimum in the culture filtrates and organic extracts of Aspergillus species used
Efficacy of <i>Bacillus subtilis</i> V26 as a biological control agent against <i>Rhizoctonia solani</i> on potato
No full textPythium leak control in potato using aqueous and organic extracts from the brown alga Sargassum vulgare (C. Agardh, 1820)
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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