U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home News & Events News Articles Research News 2020





- ARS@Work
- Blog
- Down on the Farm
- Image Gallery
- News Archive
- Podcasts
- Press Room
- Science in Your Shopping Cart
- Scientific Discoveries
- Tellus
- Under the Microscope
- YouTube Channel

Aedes aegypti
 Researchers Put Cornstarch to Use Fighting Pests ByJan Suszkiw March 2, 2020 Add yet another use for cornstarch—besides thickening soups and gravies, making adhesives, soothing skin and removing stains. Agricultural Research Service (ARS) scientists in Peoria, Illinois, are now using the versatile commodity to make products that can fight insect pests, prevent disease and decay and impart water resistance to surfaces. Underpinning that effort is the team's use of patented procedures for converting cornstarch into a new class of material known as amylose inclusion complex (AIC)—an advance aimed at increasing the commodity's value even more. Products created from the AIC include emulsions using essential oils from garlic, asafoetida (a type of spice) and other plants to control mosquito larvae in aquatic habitats. The emulsions are toxic to mosquito larvae but not the environment, which makes them promising botanical alternatives to synthetic insecticides, noted one of the ARS scientists, Ephantus Muturi, who is with the National Center for Agricultural Utilization Research (NCAUR) in Peoria. Muturi said the emulsions envelope droplets of the oils, stabilizing them and protecting them from extremes of heat or oxidation that can reduce their potency when applied to mosquito larvae habitats, like storm water catch basins and old tires. The emulsions also allow the oil droplets to disperse in water, contrary to their natural tendency. This, in turn, increases the likelihood of their contacting and killing the larvae, improving control of the young pests. In laboratory trials, exposure to the essential oil emulsions killed the larvae of yellow fever mosquitoes (*Aedes aegypti*) in 24 hours. The number that died upon exposure was dependent on the type of oil and formulation used, noted Muturi, who reported the findings in the October 2019 issue of the journal *Insect*s together with NCAUR colleagues William Hay, Robert Behle and Gordon Selling. Ultimately, the team envisions using the essential oil emulsions as part of an integrated approach to controlling mosquitoes and preventing the diseases they can spread, such as West Nile virus, yellow fever, dengue and Zika. On another front, Hay, Behle and their colleagues are examining cornstarch-based emulsions that could put the kibosh on wood-damaging termites and rot-causing fungi, including species that cause stored potato losses of up to 25 percent annually. Other products include films and coatings that regulate gas exchange or impart water repellency to paper and other cellulosic materials, as well as glass. Like the emulsions, they too were derived from the AIC. Selling and ARS chemist George Fanta used current industrial techniques such as steam-jet cooking to produce the AIC from high-amylose cornstarch, fatty acid salts, and other biobased ingredients. The team's efforts support a broader push at Peoria to develop new, value-added uses for Midwestern crops like corn that will help diminish the reliance on petroleum-based goods and the environmental "footprint" their use can leave behind. *The Agricultural Research Service is the U.S. Department of Agriculture's chief scientific in-house research agency. Daily, ARS focuses on solutions to agricultural problems affecting America. Each dollar invested in agricultural research results in $20 of economic impact.*


Return to top


Research
                            Media
                            About ARS
                            Work With Us


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov