Nature - Silence of the Bees

CoolDocumentaries
 

Watch the full episode of PBS Nature's Silence of the Bees, which looks at a recent phenomenon dubbed Colony Collapse Disorder (CCD). In the winter of 2006, a strange phenomenon fell upon honeybee hives across the country. Without a trace, millions of bees vanished from their hives, leaving billions of dollars of crops at risk and potentially threatening our food supply. The epidemic set researchers scrambling to discover why honeybees were dying in record numbers — and to stop the epidemic in its tracks before it spread further.

'Colony Collapse Disorder' Threatens Bees, US Agriculture

linktv

Bees are critical to ensuring our food supply, yet they are disappearing at an alarming rate. Over thirty percent of our agricultural crops depend on bees for pollination, and bee pollination means about $15 billion in agricultural production for the United States. But the number of bee colonies has fallen by 45 percent in the last 60 years. In 2006, US beekeepers noticed something they've never seen before -- massive bee die offs. Every year since 2006, one third of bee colonies in the United States disappear. This mysterious bee die off came to be called colony collapse disorder. Colorado beekeeper Tom Theobald explains explains what's behind bee disappearance and what we need to do about it.

Vídeo Técnico sobre Calda Bordalesa

confie2010

A calda bordalesa (ou bordelesa) é a mais famosa das caldas cúpricas. Se não fosse a ação cáustica que o sulfato de cobre exerce sobre as plantas e a facilidade com que é lavado pela água das chuvas, bastaria derretê-lo em água e pulverizar. Torna-se necessário adicionar cal para contornar estes inconvenientes e obter um preparado com suficiente poder destruidor sobre os parasitas, razoável duração do seu efeito protector e nenhuma acção prejudicial às plantas. A calda bordalesa é admitida na horticultura biológica, sendo talvez um dos meios mais eficazes de combate às pestes.

Biosfera 325 Fruticultura Biológica

francbarros09

Faz bem à saúde, cuida do ambiente e oferece sabores originais, nem sempre fáceis de encontrar numa banca de supermercado. A fruta biológica tem atraído agricultores nacionais a investir num produto de qualidade, com reduzidos custos ambientais.
No Biosfera desta semana, viaje ao encontro de variedades regionais com cunho “bio”, como a pêra-rocha, a cereja de Resende e as maçãs de montanha de Armamar.

Aprovecho Spring 2012 Workshop : Institutional Stove Project Update

dennishartleyart
 

Fred Colgan, Director of the Institutional Stove Project, gives an update, including unveiling the new 100 liter stove, and placement of the autoclave ensemble in a hospital in Nigeria. Fred reports also on his recent trip to IDP camps in Darfur, where 100,000 children are being fed daily with our 60 liter stove, and Ethiopia, where these stoves have recently been placed in all ten refugee camps.

Source : http://www.aprovecho.org/lab/pubs/video-gallery/3/10-video-gallery

Peak Moment 214 : Rocket Stoves - Hot, Healthy, Efficient

peakmoment

Mike Hatfield says the magic of a rocket stove is getting the heat into what you're trying to heat. His tour of a rocket stove reflects designs perfected for decades at Aprovecho Research Center in rural Oregon. They also test and suggest improvements to stoves from developing countries, aiming to reduce smoke to help children's respiratory health. Fred Colgan shows specialized stove parts and assembly jigs he ships to developing countries, where local people construct rocket stoves from mostly local materials. Appropriate technology at its best! [aprovecho.org]

Audio, transcript and high-quality video of this show at :
http://www.peakmoment.tv/conversations/?p=491

Biosfera 133 : Biodiversidade agrícola em perigo

http://stopogm.net/?q=node/566

Qual a riqueza genética das espécies agrícolas nacionais?
Portugal já perdeu dezenas de variedades de cereais, frutos e legumes, devido à globalização de sementes híbridas e às monoculturas.
Apesar do abandono agrícola algumas associações e estudiosos têm-se dedicado a ressuscitar variedades de tomate, de maçã e até uma peculiar leguminosa - o chícharo.
Conheça a agrobiodiversidade nacional neste Biosfera.