Scientists Find Use of Fly Ash in Mosquito Control

Scientists Find Use of Fly Ash in Mosquito Control

  • Research Stash
  • News
  • 1.8K

Fly ash, a harmful byproduct of coal-based power generation, has found a new use – mosquito control. Scientists at Vector Control Research Centre (VCRC) of the Indian Council of Medical Research (ICMR) and Pondicherry University have successfully used fly ash as a carrier for Bacillus Thuringiensis Israelensis (Bti), a biopesticide used for killing larvae of many insects. The results of the study have been published in Indian Journal of Medical Research.

The researchers have found Bti formulation containing fly ash as carrier and 1 percent carboxymethyl cellulose as an additive to be effective against mosquito larvae. Bti is mainly derived from microbial cultures and is known to produce proteins that act against pests of agriculture and medical importance. Its use against mosquitoes responsible for transmitting malaria, dengue, yellow fever, and filariasis has picked a great deal in recent years. It is considered safe for humans.

For a successful application, Bti formulation needs an additive and a carrier. At present, Plaster of Paris and charcoal are used for this purpose. The new study has found that the use of fly ash as carrier material for can enhance chances of its ingestion.

“As different types of formulations have varied levels of residual activity in addition to feasibility for use in specific types of habitats, their application, if planned appropriately and continuously in any area, will help in bringing about a drastic reduction in the mosquito population,” explained Dr Arulsamy Mary Manonmani, a researcher at VCRC.

Fly ash is considered harmful to human health as it contains heavy metals, but scientists say its use for mosquito control would not be harmful to human or environmental health. An electron microscopic analysis showed that samples of fly ash-Bti formulation contained only macro and micronutrients which are beneficial when applied in freshwater bodies such as paddy fields. The analysis did not find any toxic heavy metals.

A 2009 study had also shown that leaching of toxic heavy metals from fly ash is negligible when the pH of the water body is neutral or alkaline. Mosquito-breeding habitats have always been reported to be alkaline in nature. The ICMR Study found the formulation of fly ash with Bti to be safe for aquatic species as well as mammals.

“Although this formulation has potential to replace existing carrier material in biopesticides, an in-depth study on aspects such as long-term toxicological analysis, its persistence in different habitats, storage stability and its economic needs is to be conducted,” pointed out Sachin Tikar and Shri Prakash, vector management experts from Defence Research and Development Establishment, in a commentary published in the same issue of the medical journal.

During 2016-2017, 169.25 million tons of fly ash was generated in India but only around 63 percent was properly utilized in cement plants, ready-mix concrete, road construction, brick manufacturing and other sectors. Hence, use of fly ash in the biopesticide industry can further contribute to its safe and useful disposal.

Besides Dr. Manonmani, the research team included Saravanan Tamilselvan and Purushothaman Jambulingam. (India Science Wire)

 By Manu Moudgil

Journal Article

Fly ash-based water dispersible powder formulation of Bacillus thuringiensis var. israelensis: Development & laboratory evaluation against mosquito immatures

For the latest Science, Tech news and conversations, follow Research Stash on TwitterFacebook, and subscribe to our YouTube channel 

“As different types of formulations have varied levels of residual activity in addition to feasibility for use in specific types of habitats, their application, if planned appropriately and continuously in any area, will help in bringing about a drastic reduction in the mosquito population,” explained Dr Arulsamy Mary Manonmani, a researcher at VCRC.

Fly ash is considered harmful to human health as it contains heavy metals, but scientists say its use for mosquito control would not be harmful to human or environmental health. An electron microscopic analysis showed that samples of fly ash-Bti formulation contained only macro and micronutrients which are beneficial when applied in freshwater bodies such as paddy fields. The analysis did not find any toxic heavy metals.

A 2009 study had also shown that leaching of toxic heavy metals from fly ash is negligible when the pH of the water body is neutral or alkaline. Mosquito-breeding habitats have always been reported to be alkaline in nature. The ICMR Study found the formulation of fly ash with Bti to be safe for aquatic species as well as mammals.

“Although this formulation has potential to replace existing carrier material in biopesticides, an in-depth study on aspects such as long-term toxicological analysis, its persistence in different habitats, storage stability and its economic needs is to be conducted,” pointed out Sachin Tikar and Shri Prakash, vector management experts from Defence Research and Development Establishment, in a commentary published in the same issue of the medical journal.

During 2016-2017, 169.25 million tons of fly ash was generated in India but only around 63 percent was properly utilized in cement plants, ready-mix concrete, road construction, brick manufacturing and other sectors. Hence, use of fly ash in the biopesticide industry can further contribute to its safe and useful disposal.

Besides Dr. Manonmani, the research team included Saravanan Tamilselvan and Purushothaman Jambulingam. (India Science Wire)

 By Manu Moudgil

Journal Article

Fly ash-based water dispersible powder formulation of Bacillus thuringiensis var. israelensis: Development & laboratory evaluation against mosquito immatures

For the latest Science, Tech news and conversations, follow Research Stash on TwitterFacebook, and subscribe to our YouTube channel 

" }

Scientific Protocol in The Offing for Cloud Seeding

Scientists at the Indian Institute of Tropical Meteorology (IITM) here are preparing to launch a study during the coming monsoon season to understand physical properties of clouds and particulate matter in the atmosphere and also their interaction, as part of an exercise to formulate a scientific protocol for cloud seeding operations to produce artificial rains.

  • News
  • 1.2K
Read more
Study Reveals Startling Findings on Arctic Sea Ice Decimation

Study Reveals Startling Findings on Arctic Sea Ice Decimation

A study on underwater sounds using a passive acoustic monitoring system during the winters has been able to probe sea ice melting in the Arctic and its contributing factors.

  • News
  • 1.1K
Read more
New Book Presents Untold Stories of Societal Impact of S&T in Independent India

New Book Presents Untold Stories of Societal Impact of S&T in Independent India

Indelible ink, generic drugs, information technology, horticulture and flower industry based on tissue culture, Amul, diamond cutting industry, blood collection bags, aquaculture, basmati rice. What is common among all these things?

  • News
  • 1.6K
Read more

Internet is huge! Help us find great content

Newsletter

Never miss a thing! Sign up for our newsletter to stay updated.

About

Research Stash is a curated collection of tools and News for S.T.E.M researchers

Have any questions or want to partner with us? Reach us at hello@researchstash.com

Navigation

Submit