Mostrando entradas con la etiqueta USDA. Mostrar todas las entradas
Mostrando entradas con la etiqueta USDA. Mostrar todas las entradas

sábado, 1 de octubre de 2016

Ingestible insecticides for spotted wing Drosophila control - Insecticidas ingeribles para el control de la Drosophila de alas manchadas

SWD on a strawberry fruit (http://whatcom.wsu.edu/ipm/swd/images/swd.jpg)
Bioassays tested insecticidal activity of Erythritol fro the nutritive sweetener, Truvia, and an insect growth regulator, Lufenuron, against life stages (eggs, larvae, pupae, adults) of Drosophila melanogaster (Meigen) and Drosophila suzukii (Matsumura), the spotted wing Drosophila (SWD). These compounds were chosen for their demonstrated acute toxicity to adult and larval Drosophila and potential use on organic fruit farms. D. melanogaster fed on standard Drosophila diet media moistened with water containing known concentrations of Erythritol. Likewise, SWD consumed standard diet media as well as thawed host fruit (blackberries and blueberries) treated with solutions of Erythritol, Lufenuron or both. 

During the first bioassay, Erythritol at lower concentrations between 0 and 500 mm (~61 000 ppm) in water and mixed with instant diet media increased adult survival from ~80% to 97% for D. melanogaster and SWD. However, from aqueous concentrations ranging from 1750 (~414 000 ppm) to 2000 mm (~244 000 ppm), Erythritol killed 100% of adult Drosophila in culture vials. One hundred per cent mortality for SWD and D. melanogaster occurred at ≥0.5 m (~61 000 ppm) Erythritol added to diet media or topically applied to host fruit. 

In a second bioassay, 0.013–1.000 ppm of aqueous Lufenuron, a chitin synthase inhibitor, when added to dry diet media prevented 90–99% of SWD from reaching the pupal stage. In another assay, ~67% of SWD eggs or neonates (early first instars) died inside blackberries pre-treated with (dipped in) a soapy solution of 10 ppm Lufenuron. Pre-treating blackberry fruit with an Erythritol–Lufenuron mixture reduced SWD brood survival by 99%. Likewise, during our last fruit-based bioassay, 98% of eggs and neonates died inside blueberries similarly pre-treated. During the last experiment, Lufenuron in diet media also rendered adult females sterile. Sterility, however, dissipated over 7 days once females began feeding on a Lufenuron-free diet media.

Source: Sampson, B. J., Werle, C. T., Stringer, S. J. and Adamczyk, J. J. (2016), Ingestible insecticides for spotted wing Drosophila control: a polyol, Erythritol, and an insect growth regulator, Lufenuron. J. Appl. Entomol.. doi:10.1111/jen.12350

domingo, 11 de septiembre de 2016

New tasty blackberry and blueberry varieties from the USDA - Dos nuevas y sabrosas variedades de zarzamora y arándano del USDA

'Columbia Giant' blackberries (http://fruitgrowersnews.com/)

Agricultural Research Service (ARS) geneticist Chad Finn and his colleagues at the Horticultural Crops Research Unit in Corvallis, Oregon, developed two new berry varieties—a blueberry and a blackberry—that were recently released to the public.

Up until the early 1900s, blueberries were picked from the wild, and the bushes often did not survive when transplanted elsewhere. True domestication-involving propagation of the plant by the grower and plant breeding to improve desirable traits-was beyond reach until 1910. That's when USDA botanist Frederick Coville discovered that blueberry bushes require moist, acidic soil to thrive. In 1916, exactly a century ago, the first commercial cultivated crop of highbush blueberries was harvested.

That history is now enhanced by Baby Blues, a cultivar released in cooperation with the Oregon State University's Agricultural Experiment Station and the Washington State University's Agricultural Research Center. This new blueberry is making its debut during the 100th anniversary of the first cultivated blueberry crop to go to market.

"Baby Blues is a vigorous, high-yielding, small-fruited, machine-harvestable highbush blueberry with outstanding fruit quality. It's well-suited for those processing markets that require a small fruit size," says Finn. "Baby Blues should offer growers and processors an alternative to the low-yielding Rubel highbush blueberry, and it may thrive in milder areas where northern highbush blueberries are grown."

Finn also developed a new blackberry named Columbia Giant. This thornless, trailing blackberry cultivar came from the same breeding program as Baby Blues and was also released in cooperation with the Oregon State University's Agricultural Experiment Station.

"This cultivar is a high-quality, high-yielding, machine-harvestable blackberry with firm, sweet fruit that, when processed, is similar to or better in quality than fruit from the industry standards Marion and Black Diamond," says Finn. "Due to its extremely large size, however, Columbia Giant will most commonly be sold in the fresh market."

Columbia Giant is adaptable to areas where other trailing blackberries successfully grow.—By Sharon Durham, ARS Office of Communications.

Source: USDA ARS Online Magazine Two Tasty New Berries From ARS


sábado, 14 de mayo de 2016

25 STRAWBERRY cultivars were patented in 2015 - 25 variedades de FRUTILLA (FRESA) fueron patentadas en 2015


New strawberry cultivars: 25 patents were granted in 2015. Driscoll (US) was the applicant with more patents: 6 cultivars, followed by Plant Science Inc (US): 4; Darbonne (France/Spain): 3;  Sweet Darling Sales Inc (US): 3, etc. (Fig. 1).

Fig. 1. Left column is the applicant. The right column shows the name of the cultivars patented by each applicant in 2015.
From the 25 patents, 19 were granted to companies based in the US, 3 in France/Spain; 2 in Italy and 1 in the UK (Fig. 2).

Fig. 2. Applicants nationality

Source: Prepared by Daniel Kirschbaum with information taken from patentinspiration.com

sábado, 10 de octubre de 2015

FRUITS and VEGETABLES trading will benefit from Trans-Pacific Partnership (TPP) Agreement - El comercio de FRUTAS y VERDURAS se beneficiará con el Acuerdo Transpacífico de Cooperación Económica

Photo from www.hortidaily.com
The U.S. Department of Agriculture (USDA) today released a series of fact sheets illustrating how the newly reached Trans-Pacific Partnership (TPP) agreement can boost the U.S. agriculture industry, supporting more American jobs and driving the nation's rural economy. Created by the USDA's Foreign Agricultural Service (FAS), the fact sheets graphically depict how each state and individual commodities stand to benefit from increased agricultural trade with the 11 other TPP countries.

Trade ministers from Australia, Brunei, Canada, Chile, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore, the United States and Vietnam concluded TPP negotiations on Oct. 5 in Atlanta, Ga. Trade with these countries accounted for 42% of U.S. agricultural exports in 2014, contributing $63 billion to the U.S. economy.

"Increased demand for American agricultural products and expanded agricultural exports as a result of the TPP agreement will support stronger commodity prices and increase farm income. Increased exports will support more good paying export-related jobs, further strengthening the rural economy," Agriculture Secretary Tom Vilsack said. "All of this activity benefits rural communities and keeps American agriculture on the cutting edge of global commerce."

The United States runs an agricultural trade surplus which benefits farmers, ranchers, and all those who live, work and raise families in rural America. Agricultural trade supports more than one million American jobs. TPP will remove unfair trade barriers and help further the global expansion of American agricultural exports, particularly exports of meat, poultry, dairy, FRUITS, VEGETABLES, grains, oilseeds, cotton and processed products.

The information released today illustrates benefits for key commodities and all 50 states. Learn more about TPP and its benefits to the agricultural economy at http://www.fas.usda.gov/tpp. Here is just a snapshot of how the TPP would boost exports of some U.S. food and agricultural products: 

Fruits and vegetables
Japan, Malaysia, and Vietnam will eliminate tariffs on all FRESH and PROCESSED FRUITS, including CITRUS. Malaysia and Vietnam will immediately eliminate all tariffs, and Japan nearly all tariffs, on FRESH and PROCESSED VEGETABLES. All three countries will eliminate tariffs on POTATOES and potato products.
Source: www.hortidaily.com

lunes, 21 de septiembre de 2015

US' first-ever national FOOD WASTE reduction goal - Por primera vez EEUU se propone una meta nacional de reducción del DESPERDICIO DE ALIMENTOS

Source: http://archive.onearth.org
Agriculture Secretary Tom Vilsack and Environmental Protection Agency Deputy Administrator Stan Meiburg announced the United States' first-ever national food waste reduction goal, calling for a 50% reduction by 2030. As part of the effort, the federal government will lead a new partnership with charitable organizations, faith-based organizations, the private sector and local, state and tribal governments to reduce food loss and waste in order to improve overall food security and conserve our nation's natural resources. The announcement occurs just one week before world leaders gather at the United Nations General Assembly in New York to address sustainable development practices, including sustainable production and consumption. As the global population continues to grow, so does the need for food waste reduction.

"The United States enjoys the most productive and abundant food supply on earth, but too much of this food goes to waste," said Agriculture Secretary Tom Vilsack. "An average family of four leaves more than two million calories, worth nearly $1500, uneaten each year. Our new reduction goal demonstrates America's leadership on a global level in in getting wholesome food to people who need it, protecting our natural resources, cutting environmental pollution and promoting innovative approaches for reducing food loss and waste."

Food loss and waste in the United States accounts for approximately 31 percent—or 133 billion pounds—of the overall food supply available to retailers and consumers and has far-reaching impacts on food security, resource conservation and climate change. Food loss and waste is single largest component of disposed U.S. municipal solid waste, and accounts for a significant portion of U.S. methane emissions. Landfills are the third largest source of methane in the United States. Furthermore, experts have projected that reducing food losses by just 15 percent would provide enough food for more than 25 million Americans every year, helping to sharply reduce incidences of food insecurity for millions.

"Let's feed people, not landfills. By reducing wasted food in landfills, we cut harmful methane emissions that fuel climate change, conserve our natural resources, and protect our planet for future generations" said EPA Administrator Gina McCarthy. "Today's announcement presents a major environmental, social and public health opportunity for the U.S., and we're proud to be part of a national effort to reduce the food that goes into landfills."

Ongoing federal initiatives are already building momentum for long-term success. In 2013, USDA and EPA launched the U.S. Food Waste Challenge, creating a platform for leaders and organizations across the food chain to share best practices on ways to reduce, recover, and recycle food loss and waste. By the end of 2014, the U.S. Food Waste Challenge had over 4,000 active participants, well surpassing its initial goal of reaching 1,000 participants by 2020.

In addition to the U.S. Food Waste Challenge, USDA has unveiled several food loss reduction initiatives over the past few years, including an app to help consumers safely store food and understand food date labels, new guidance to manufacturers on donating misbranded or sub-spec foods, and research on innovative technologies to make reducing food loss and waste cost effective. USDA will build on these successes with additional initiatives targeting food loss and waste reduction throughout its programs and policies.

In addition, today, USDA is launching a new consumer education campaign through its Center for Nutrition Policy and Promotion with information on food loss and waste facts and reduction tips. Moreover, a new section on ChooseMyPlate.gov will educate consumers about reducing food waste to help stretch household budgets.

USDA and EPA will also continue to encourage the private sector—food service companies, institutions, restaurants, grocery stores, and more—to set their own aggressive goals for reducing food loss and waste in the months ahead. Organizations such as the Consumer Goods Forum, which recently approved a new resolution to halve food waste within the operations of its 400 retailer and manufacturers members by 2025, are helping to lead the way.

The United States is leading global efforts to address the threat of climate change. The first-ever national food waste goal is just one part of the Obama Administration's commitment to protecting our environment for future generations. Since President Obama took office in 2009, the US has increased solar generation by more than ten-fold, tripled electricity production from wind power, and reduced greenhouse gas pollution in the US to its lowest levels in nearly 20 years. By setting achievable environmental goals, this Administration is making strides to help boost the economy and protect the health of American families for the long-term.
Source: http://www.usda.gov

domingo, 20 de septiembre de 2015

Too much woo for growers to go ORGANIC? - Demasiado cortejo a los productores para convertirse en ORGÁNICOS?

The Internet is awash with reports claiming that organic farming is more profitable for farmers than conventional agriculture. The latest spate of posts was based on a study recently published in PNAS by Washington State University researchers who found a price premium of 22 to 35 percent over the same conventionally grown food, despite yields that were 18 percent lower for organics.
Phot from http://www.geneticliteracyproject.org
This report echoes the conclusions of a 2009 UN Food and Agriculture Organization (FAO) study, which also pointed to the “non-economic benefits” of organic agriculture–it’s supposed sustainability benefits. But the claims of improved profitability for farmers run up against some hard facts: organic farming in the West is far from booming, even as sales of organic foods are increasing sharply, albeit from a very low base. If there’s so much money to be made in organics, then why aren’t more farmers switching?

Declines in organic farms

While the consumer demand for organic food is rising, there are 16,525 organic farms in the U.S., only 0.8 percent of all farms. Most organic farms also are small—in Washington state, 30 percent of organic farms had less than $25,000 a year in sales, while just 9 percent had more than $1 million. The USDA also has found that most organic farms tend to be smaller (which it measures by having less than $250,000 in sales).
The U.S. Department of Agriculture does not keep data on farms that have dropped out of the National Organic Program, and changes in data collection between 2007 and 2012 make it nearly impossible to make that kind of comparison (for now—the USDA is conducting surveys that could reveal more data this or next year).
But other studies show a wobbly, at best, support for organic farming by farmers themselves. A 2010 study by Washington State University found that organic certifications in the state dropped by 18 (to 735), while five farms became certified organic. More recent state data shows that the number of organic farms has dropped slightly again in 2013, and acreage devoted to organics also dropped.
In 2007, the California Institute for Rural Studies found that while 600 farmers entered that state’s organic program (California’s the only state with its own organic registration process), 523 farmers dropped out of the program between 2003 and 2005 alone. Just last month the UK Guardian carried an article titled “Why are organic farmers across Britain giving up?” detailing the plight of organic farmers who are being squeezed despite the sharply higher prices paid by consumers for organic food:
Darren and Julia Quenault took their first delivery of non-organic cattle feed a few weeks ago. After nine years of organic dairy farming, they decided to convert back to conventional, and give up their organic status, at the end of last year.
The Quenaults are not alone. Even as demand for organic food remains high, the farmers producing it are falling by the wayside. … UK government figures show that while organic food sales have bounced back from the low that followed the 2008/9 financial crash, the amount of land being farmed organically in Britain continues to shrink. In 2013, the last year for which data are available, land in the process of being converted to organic fell by 24 percent, with fully organic land falling by 3.9 percent. The number of producers and processors of organic food fell for the fifth year in a row, by 6.4 percent, and the number of organic sheep, pigs and cattle also fell.

What do farmers say?

The Quenaults say the reason they switched came down to simple economics. “Cattle feed costs were excruciatingly expensive and we just couldn’t absorb them,” says Julia. “We’re saving £1,800 a month. We couldn’t have continued, we would have had to put up prices significantly, and we didn’t feel we could burden consumers with an extra 12 percent on the price of milk.”
Interviewing farmers also has turned up revealing patterns in what farmers adopt, reject or abandon organic farming. Jeff Murray, a marketing professor at the University of Arkansas, and his colleagues found that significant numbers of farmers were resisting organic farming, despite the supposed allure of premium profits. In the study, they found that ideology, especially among conventional farmers, was the primary driver to switching to or rejecting organic:
Conventional farmers saw themselves as better planners, more scientific, and embracing minimal tilling and “chemical applications” to increase yield. Meanwhile, organic farmers saw themselves as farming like their grandparents, spending more time in the field but seeing soil as an ecosystem.
Conventional farmers saw organic farmers as unscientific, and following “an organic crop guru.” Meanwhile, organic farmers perceived conventional farmers as lazy, “leaving it all up to the co-op to make decisions for them.” Aside from these perceptions, conventional farmers said they’d consider some organic practices if they paid off.

For many farmers, organic practices as a whole do not always translate to higher profits. One of the obstacles is the same thing faced by conventional farmers, including those who use genetically modified seeds: what farmers see as over regulation. A study by the University of California found that 38 percent of organic farmers listed regulatory burdens as their chief challenge. “These included paperwork and record keeping for certification, inspections, finding a third-party certifier, and the cost of certification,” the study said.
The certification process is quite involved. Under the USDA National Organic Program (NOP), any applying farm must go through a transition period of three years, during which it cannot sell any product as certified “organic.” However, the farm is supposed to be changing its practices to organic during this time. Once certified, a farmer has to pass inspections, and document that his or her farm is following all the rules governing organic farming.
Input costs are not cheap, either, sometimes exceeding those for conventional farming. Labor costs can be significantly higher for organic farming. For example, many conventional farmers grow GMO Bt crops, which require almost no insecticide spraying while organic farmers with pest problems must spray their crops regularly, which requires extra labor. Any conventional farmers growing herbicide tolerant crops have to weed far less, another labor saving innovation over organic farmers.
One organic farmer in a California study told researchers “This is all labor. I’ve had a few partners that backed out once they saw they had to spend $1,800 an acre weeding spinach compared to $150 an acre in conventional.” Meanwhile, an organic farmer in Ventura County, California, told the researchers that “when I farmed conventionally, I had six employees on 300 acres. Now that I’m farming organically, I have 15 employees on 30 acres.”

Too much woo?

Other farmers have abandoned organics because they see the movement as more like a religion than focused on agricultural science. Mike Bendzela, a former organic farmer in Maine, recently likened the philosophy of the organics movement……to a barrel raft covered in loose planks. In trying to justify their beliefs, the pile on the claims (planks), each of which rests on a different assumption (barrel). And when one claim is questioned, they simply jump to another plank on the raft and try to hold it all together.
Bendzela recounted attending a Maine Organic Farmers and Gardeners Association fair, and encountering “Whole Life Tent,” replete with “reflexologists, naturopathic doctors, homeopaths, Reiki practitioners… I was unsure what any of this had to do with agriculture.” What they were: “a necessarily evil to get non-ag types of attend. This disorder is not limited to the fairgrounds.”

Prices don’t stay the same

One looming question is whether the organic price premium will last. According to the Washington State University report: “The actual premiums paid to organic farmers ranged from 29 to 32 percent above conventional prices. Even with organic crop yields as much as 18 percent lower than conventional, the breakeven point for organic agriculture was 5 to 7 percent.” According to the researchers, that means that organics could still be profitable even at much lower premiums.
However, if adoption of some organic practices (crop rotation and multi-cropping in particular) are adopted by conventional farmers, the “yield” gap between organics and conventional crops, already significant, grows even wider. It’s not even clear that current premiums are even covering the higher costs of organic farming (while the Washington State group notes that premiums have held steady for 40 years, organic food has only been an organized entity for less than 20). In fact, genetically engineered foods are largely responsible for the ability to yield more crops on less land, according to the USDA. With changes in supply and demand come changes in prices. At least, farmers are more than a little skeptical of the sustainability of profits, much less products.
Source: Andrew Porterfield (www.geneticliteracyproject.org).

domingo, 28 de junio de 2015

Nocturne, nueva variedad de ARÁNDANO resistente al frío - Nocturne, new BLUEBERRY variety resistant to cold

El Departamento de Agricultura de EE.UU. (USDA) recibió recientemente una patente para Nocturne, un cultivar de arándano desarrollado por científicos del Laboratorio de Mejoramiento Genético de Frutas y Hortalizas del Servicio de Investigación Agrícola (ARS).

Foto por Mark Ehlenfeldt/ARS
Foto por Mark Ehlenfeldt/ARS
El nuevo cultivar provino de un cruzamiento de arándanos hecho por el genetista de plantas Mark Ehlenfeldt, en 1993. Posteriormente la planta fue seleccionada y evaluada desde 1996 a 2011, señala el ARS. Así, Nocturne, fue testeada bajo el nombre “US 1056,” y es un cruce entre US 874 (una mezcla de especies híbridas) y Premier (un arándano rabbiteye comercial). Nocturne incorpora germoplasma de tres especies de arándanos diferentes, incluyendo una resistente al frío extremo.

“Nocturne es un arándano resistente al invierno, vigoroso y negro. Esta variedad está destinada a ser una planta comercial especializada para el hogar, paisajes y de uso ornamental”, según Ehlenfeldt. La fruta destaca principalmente por su gran resistencia al invierno la cual es comparable a cultivares de arándano del norte y por su lentitud para romper la latencia en primavera, lo que lo diferencia de cualquier otro arándano híbrido rabbiteye disponible en la actualidad.

El nuevo arándano fructifica de forma fiable en Nueva Jersey (EE.UU), con un promedio de 5.4 kg por planta. Asimismo, ARS destaca que, pese a funcionar con auto-polinización, los rendimientos y el tamaño de la fruta pueden ser mejorados mediante polinización cruzada. La fruta inmadura es de un color rojo-anaranjado, ofreciendo un atractivo paisaje. Mientras, la fruta madura es de color negro, dulce y de tamaño mediano, con un atípico sabor en comparación a otros arándanos rabbiteye o highbush.

Nocturne madura a finales de temporada. La calidad de cicatriz -cuán limpiamente el fruto se separa del tallo- es precisa y el fruto sólo tiene una firmeza moderada, por lo que Nocturne no se recomienda para el almacenamiento o exportación. Se espera que las plantas de Nocturne estén disponibles para los productores dentro de un año o dos.
Fuente: www.portalfruticola.com

lunes, 6 de abril de 2015

Mejoran la acción de virus entomopatógeno que controla a la polilla del MANZANO - Scientists improve the action of entomopathogenic virus that controls APPLE moth

Dos ingredientes comunes para los humanos se presentan como alternativas para reforzar la eficacia del Cydia pomonella granulovirus (CpGV), un virus de invertebrados que se ha formulado comercialmente para matar las larvas de la polilla del manzano (Cydia pomonella).

A mature codling moth larva on a sliced apple /Photo by Peggy Greb.
Larva de polilla del manzano /Foto de Peggy Greb.
Estudios realizados por el entomólogo del Departamento de Agricultura de EE.UU. (USDA), Alan Knight, y su colega sueco, Peter Witzgall, muestran que la adición de levadura de cerveza y azúcar morena a las formulaciones en aerosol puede aumentar la ingesta por parte de la plaga del virus. El Servicio de Investigación Agrícola de EE.UU. (ARS) detalló que los estudios de los científicos son parte de una investigación más amplia que busca incorporar nuevos ingrediente –o “adyuvantes”- que mejoren el rendimiento del CpGV como una base alternativa de base biológica a los insecticidas de amplio espectro.
Actualmente, el CpGV se utiliza en miles de hectáreas de manzanos en todo el mundo. Sin embargo, su eficacia como bioinsecticida se puede ver disminuida por la exposición a la luz ultravioleta (UV) y la tendencia de las larvas de “excavar” en la fruta para alimentarse poco después de la eclosión, dijo Knight. De acuerdo a lo informado, en 2 años de pruebas de campo la adición de azúcar morena y levadura de cerveza a los aerosoles de CpGV mató más larvas (83%) que las formulaciones sólo con el virus (55%) y los controles sólo de agua (17%).
Los tratamientos también redujeron lesiones por alimentación en las manzanas en 1 de los 2 años de prueba, reportó Knight. A pesar de las mejoras, el ARS reportó que no es probable que el CpGV se convierta en el único control de la polilla del manzano para los productores, sino más bien será una parte de un enfoque integrado de la gestión de plagas que incluye otras medidas como el uso de feromonas. Junto con el azúcar y la levadura de cerveza, los científicos están evaluando otros adyuvantes naturales para lograr que el virus sea más eficaz.