great research Tom, do you know if this has been peer reviewed ? where did
you come across it ?
At 01:01 AM 10/02/2003 -0800, you wrote:
> Basilios Papageorgiou, Jürgen Helbig, Carmen Büttner:
> Ability of Watery Extracts of Composted Organic Waste from Urban
>Households to Control Airborne Plant Pathogens
>
> BASILIOS PAPAGEORGIOU, JÜRGEN HELBIG, CARMEN BÜTTNER
> Humboldt University Berlin, Institute of Horticultural Sciences, Germany=
>
> The effect of compost applications on plant health has mainly been
>investigated regarding soil borne diseases. The few investigations on the
>effectiveness of shoot treatments with watery compost extracts showed that
>leaf pathogens were effectively controlled and that different mechanisms
>seemed to be involved. Additionally to systemically acquired induced
>resistance, some other antagonistic mechanisms of the microorganisms
>present in compost extracts were observed, including production of
>antibiotics, concurrence for nutrients or parasitism. In the present
>investigation, the effectiveness of watery extracts from composts that wer=
e
>produced from organic household waste in West Africa, was examined using
>the pathosystem tomato and Alternaria solani. Applications of watery
>compost extracts successfully suppressed infection of solani on tomato.
>Different factors were checked for their impact on the effectiveness of th=
e
>extracts and the density of microorganisms present in the extracts.
>Temperature and frequency of stirring significantly influenced the density
>of microorganisms and the effectiveness against solani and [35]C. The
>extract incubated at [20]C reduced incidence of solani by [66]% as
>compared to the control, whereas the other variants were less effective. =
>The formulation substances cellulose, alginate and xanthan were added to
>the extracts to increase their effectiveness against the pathogens. The
>extract enriched with xanthan reduced disease incidence on tomato by [23]%
>as compared to the extract without formulation substances. Storage
>duration of the composts after their preparation significantly influenced
>the density of microorganisms present in the extracts and their
>effectiveness against solani on tomato. Those composts that were stored
>for a shorter period showed a higher number of microorganisms in the
>extract and a higher effectiveness of the extracts Tom Jaszewski
>www.livesoil.com 702-595-7012 -----Original Message-----
> From: Ross Orner [mailto:rorner_at_pennswoods.net]
> Sent: Sunday, February 09, 2003 7:28 PM
> To: compost_tea_at_yahoogroups.com
> Subject: [compost_tea] early blight in tomatoes on early blight on
>tomatoes? This is a problem disease for a producer in New Jersey
>conditions. Thank you, Ross Orner www. ornerfarms.com
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>Attachment Converted: "d:\old data\eudora\attach\image0011.gif"
Laura Sabourin
EcoVit Ecologically Sound Horticultural Products
Tea-riffic Aerobic Compost Tea and Acadian Seaplant Products
RR # 1
St Catharines, Ontario L2R 6P7
http://www.ecovit.ca
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Received on Mon Feb 10 2003 - 11:42:56 EST