Navigation Links
New, cost-cutting approach to formulating pest-killing fungi
Date:1/24/2013

This press release is available in Spanish.

Biopesticides containing beneficial fungi are often grown on grains or other solids, but U.S. Department of Agriculture (USDA) scientists have shown a liquid diet can work better.

The approach, dubbed "liquid culture fermentation," offers several benefits, including lower material costs and increased yields of certain forms of insect-killing fungi, including Isaria or Metarhizium, which can serve as biobased alternatives to synthetic pesticides.

For decades, biopesticide makers have grown such fungi on moistened grains or other solid materials to prompt them to churn out billions of specialized cells called "conidia," which penetrate the bodies of silverleaf whiteflies, aphids and other soft-bodied insect pests, killing the pests within a few days.

Over the past several years, however, scientists with USDA's Agricultural Research Service (ARS) have sought to improve on the practice by initiating liquid culture fermentation processes in special tanks called bioreactors. ARS is USDA's chief intramural scientific research agency.

According to Mark Jackson, a microbiologist with the ARS Crop Bioprotection Research Unit in Peoria, Ill., using liquid culture fermentation has significantly reduced production costs, especially those associated with nitrogen as a primary fungal nutrient. One nitrogen source, called hydrolyzed protein, is typically derived from agricultural commodities like milk casein, which can sell for more than $6 a pound. Liquid culture fermentation's use of less expensive nitrogen sources, including soybean flour or cottonseed meal, reduces the cost to 30 to 50 cents a pound.

Conidia have long been the spores of choice for biopesticide uses. But the researchers showed that other fungal cells can be just as effective, including "blastospores" and "microsclerotia." The latter are clumps of pigmented fibers from which conidia can form. In laboratory tests, for example, conidia resulting from soil treatments of microsclerotia from the fungus M. brunneum killed 100 percent of sugarbeet root maggots, versus 25 percent killed for conidia-only treatments.

The flexibility of liquid culture fermentation to produce different types of fungal cells opens all sorts of doors in terms of where and when the pest-fighting microbes can be applied, according to Jackson.


'/>"/>

Contact: Jan Suszkiw
jan.suszkiw@ars.usda.gov
301-504-1630
United States Department of Agriculture - Research, Education and Economics
Source:Eurekalert

Related biology news :

1. Novel approach to track migration of arctic-breeding avian species
2. Choline supplementation during pregnancy presents a new approach to schizophrenia prevention
3. Stem-cell approach shows promise for Duchenne muscular dystrophy
4. Alzheimers disease: Cutting off immune response promises new approach to therapy
5. Better approach to treating deadly melanoma identified by scientists
6. Potential gene therapy approach to sickle cell disease highlighted at ASH
7. Combining two genome analysis approaches supports immune system contribution to autism
8. Alzheimers disease in mice alleviated promising therapeutic approach for humans
9. A multidisciplinary approach and a new field help to understand cell behavior
10. Sweet new approach discovered to help produce metal casting parts, reduce toxicity
11. Traditional fisheries management approach jeopardizes marine ecosystems worldwide
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/24/2016)... Ampronix facilitates superior patient care by providing unparalleled technology to leaders of the medical ... premium product recently added to the range of products distributed by Ampronix. ... ... ... Ampronix News ...
(Date:5/12/2016)... , May 12, 2016 WearablesResearch.com ... just published the overview results from the Q1 wave ... the recent wave was consumers, receptivity to a program ... data with a health insurance company. "We ... to share," says Michael LaColla , CEO of ...
(Date:4/28/2016)... , April 28, 2016 Infosys ... (NYSE: INFY ), and Samsung SDS, a global ... that will provide end customers with a more secure, fast ...      (Logo: http://photos.prnewswire.com/prnh/20130122/589162 ) , ... but it also plays a fundamental part in enabling and ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... TOKYO , June 24, 2016  Regular discussions on ... to take place between the two entities said Poloz. ... in Ottawa , he pointed to the ... and the federal government. ... Poloz said, "Both institutions have common economic goals, why not ...
(Date:6/23/2016)... ... 2016 , ... UAS LifeSciences, one of the leading manufacturers ... Probiotics, into Target stores nationwide. The company, which has been manufacturing high quality ... list of well-respected retailers. This list includes such fine stores as Whole Foods, ...
(Date:6/23/2016)... ... June 23, 2016 , ... Charm Sciences, Inc. is ... has received AOAC Research Institute approval 061601. , “This is another AOAC-RI approval ... Bob Salter, Vice President of Regulatory and Industrial Affairs. “The Peel Plate methods ...
(Date:6/23/2016)... ... , ... STACS DNA Inc., the sample tracking software company, today announced that ... joined STACS DNA as a Field Application Specialist. , “I am thrilled that ... of STACS DNA. “In further expanding our capacity as a scientific integrator, Hays brings ...
Breaking Biology Technology: