Friday, May 25, 2018

Suppressive effect of aquaponic water on the development of root rot caused by Pythium aphanidermatum in lettuce - Stouvenakers Gilles

Suppressive effect of aquaponic water on the development of root rot caused by Pythiu...
Scientific congresses and symposiums : Unpublished conference/Abstract
Life sciences : Agriculture & agronomy
http://hdl.handle.net/2268/223145
Suppressive effect of aquaponic water on the development of root rot caused by Pythium aphanidermatum in lettuce
English
Stouvenakers, Gilles mailto [Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Gestion durable des bio-agresseurs >]
Massart, Sébastien mailto [Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Gestion durable des bio-agresseurs >]
Jijakli, Haissam mailto [Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Gestion durable des bio-agresseurs >]
24-Apr-2018
No
No
International
XV Meeting of the Working Group ‘Biological and integrated control of plant pathogens’: Biocontrol products: from lab testing to product development
23-26 avril 2018
IOBC, WPRS, Lleida University
Lleida
Espagne
[en] suppressive, biocontrol ; aquaponic ; pythium
[en] Aquaponic systems, define as recirculating soilless systems combining aquaculture and hydroponic, are at the core of innovative researches. However, plant pest and more especially plant pathogens management is still unclear. In fact, in this kind of one loop device, where the nutrient plant solution returns to the fish part, chemical pesticides and disinfecting agents are not allowed due to the presence of fishes. Furthermore, they might be toxic for beneficial bacteria present in the system, such as nitrifying bacteria. Among the large possibility of diseases occurring in soilless systems, oomycetes pseudo-fungi, responsible of root rot diseases like Pythium aphanidermatum (Edson) Fitzp, are problematics due to their capacity to produce a mobile form, making the dispersion of the disease easier. Two recent articles open the hypothesis of a natural protective action of aquaponic water or fish effluents against plant pathogens during in vitro trials (Gravel et al., 2015; Sirakov et al., 2016). This phenomenon could be linked to the presence of antagonistic microorganisms or inhibitory compounds in fish water. Assumptions that don’t seem aberrant in light of suppressive action already observed in hydroponic systems (Postma et al., 2008). To confirm these observations, in vitro experiments with aquaponic water have been carried out and completed for the first time with in vivo trials to assess its capacity to procure a plant protection effect towards P. aphanidermatum. In vitro results show a very highly significant decrease of mycelium production when 25% of aquaponic water is added to a V8 CaCO3 broth. But no difference was made between the control (standard V8 CaCO3 broth) and the broth containing 25% of 0.2 µm filtrated aquaponic water. Based on this test, inhibitory action of aquaponic water seems to be linked to a microbial action. Nevertheless, an indirect action on pathogens by the way of plant stimulation by water compounds cannot be totally excluded. During in vivo tests, aquaponic lettuces inoculated with P. aphanidermatum have significantly less disease symptoms and a better root yields compared with inoculated lettuces grown with hydroponic water. These results highlight that aquaponic water can contribute to find a novel source of BCAs. To complete the study, water samples of both experimentations were conserved for 16S rDNA Illumina sequencing, in order to identify bacteria potentially antagonist against P. aphanidermatum.
http://hdl.handle.net/2268/223145


Suppressive effect of aquaponic water on the development of root rot caused by Pythium aphanidermatum in lettuce - Stouvenakers Gilles

Urban Horticulture: Overview of Recent Developments

The growing populations in urban areas and the decrease in available land are major constraints to sustainable crop production in and around cities. All over the world, many people do not get enough food and proper nourishment. Urban horticulture which is the production of vegetables, herbs, medicinal and ornamental plants around cities may serve as a solution. Worldwide, temperatures vary in different seasons and urban growers face challenges in sustaining production due to poor yield and crop losses. Therefore, urban horticultural growers may need to employ new techniques and tools to improve their practices. However, many of these recent developments require capital, access to specific information, knowledge, and resources to improve their skills on production, processing, and marketing of their produce. This paper reviews the recent developments in urbanization and urban horticulture, the types of urban horticulture as well as tools and techniques in urban horticulture. The focus of this paper is on recent developments in vertical farming systems (hydroponics, aeroponics, and aquaponics) including organic vertical farming research. Also listed in this study are solutions that urban horticulture provides such as provision of food security and, poverty alleviation. Some of the concerns, challenges, and benefits in urban vertical farming systems would also be explored.



Urban Horticulture: Overview of Recent Developments | SpringerLink

Sunday, September 28, 2008

Mokhanselara o kgothatsa badiri

Sep 26, 2008 ... RAMOTSWA - Lephata la temo thuo le kopilwe go nna tlhaga mo go thuseng balemi go tlhwaafalela temo le go dirisa mananeo a mmuso. ...

Monday, June 9, 2008

Temo thuo e ka thusa banana

SEROWE - Banana ba rotloeditswe go simolola dikgwebo tsa temo-thuo go tsholetsa seemo sa temo le leruo mo Botswana.

Kgosi Boingotlo Radithabano wa Motshegaletau o buile se fa a amogela baeng kwa motseng o o mo dithuto-puisanong tsa temo-thuo tsa banana ba Serowe-Borwa.

O ne a itumelela go bona banana ba tsile ka dipalo tse di nametsang mme a ba gwetlha gore fa ba fetsa dithuto, ba ye go diragatsa se ba se ithutileng.

E rile Mme Bontleng Paki wa ofisi ya mopalamente wa Serowe Borwa a bega maikaelelo a bokopano, a tlhalosa fa mopalamente a leka go araba selelo sa banana ba dikgaolwana tse di mo Serowe Borwa ka bare ga ba itse sentle ka mananeo a go simolodisa dikgwebo.

Zemanta Pixie

Sunday, May 11, 2008

Dijo le ditlhare tsa Aforika

shelo jwa diphologolo le temo-thuo ya tulo ya gaeno? Tsenya letshwao fa kholomong e e maleba. .... Temo-thuo ya gaeno a ke ya dijo kgotsa ke ya dikgomo? ...

Temo Thuo On TSEBE E GOLE

Tshepang tumelo go lwantsha mogare

Republic of Botswana - Gaberones,Botswana
A re lephata la Temo-Thuo le tsaya HIV/AIDS tsia ka jaana le itse sentle gore fa le ka leseletsa e tlare mo isagong lefatshe leno le bolawe ke tlala,ka gore ...

Thursday, February 7, 2008

Temo-Thuo

MAHALAPYE - Mogolwane wa ditlhaeletsano kwa Mascom, Odirile Motlhale, a re temo thuo ke nngwe ya metswedi e e ka tokafatsang itsholelo ya lefatshe ...

Thursday, January 31, 2008

forging

Rona mona Afrika re na le matsete a tsotehang a temo-thuo, dimenerale le matla a motlakase a fehlwang ka metsi. Matsete ana a tsotehang a ka sebediswa ka ho ...

Agricultural Research Council - ARC-Grain Crops Institute

... a growing interest in crop production, where the radio programme, "Temo Thuo" on "Motsweding FM" played a significant role in sparking off the interest. ...