Revolutionary Eco-Friendly Spray Empowers Farmers to Defeat Chickpea Pest Helicoverpa Armigera!
In a major advancement for sustainable agriculture, scientist Vandana Ghormade and her team at the Agharkar Research Institute have introduced an innovative eco-friendly solution to combat the gram pod borer, known scientifically as Helicoverpa armigera. This pest poses a significant threat to chickpea crops, which are critical to India’s economy as the nation leads global production with nearly nine million tonnes annually. The financial impact of Helicoverpa armigera is staggering, with worldwide losses attributed to this pest exceeding USD 330 million each year.
Beyond chickpeas, this damaging pest also infests a variety of staple crops, including cotton, maize, tomato, and pigeonpea, heightening the urgency for effective control measures. Traditional chemical pesticides have long dominated pest management strategies, but these approaches have led to the development of resistance among target insects, diminishing their effectiveness. Moreover, the excessive use of chemical pesticides has raised environmental concerns.
To address these issues, Ghormade’s team focused on RNA interference (RNAi), a groundbreaking technique that silences critical genes in pests by inhibiting and degrading their messenger RNA (mRNA). Although RNAi demonstrates considerable promise due to its precision and non-toxic profile, practical agricultural applications have been limited by challenges in delivering stable RNA molecules capable of withstanding the conditions within the insect gut.
To overcome these hurdles, the researchers developed a topical RNAi spray utilizing chitosan-based nanoparticles for delivering double-stranded RNA (dsRNA). These nanoparticles shield the RNA from degradation and facilitate its absorption in the insect intestine, ensuring efficient gene silencing. The dsRNA was meticulously designed using bioinformatics to target essential genes in Helicoverpa armigera, specifically juvenile hormone methyltransferase and acetylcholine esterase, while leaving non-target insects unharmed.
In Ghormade’s words, “Laboratory tests revealed remarkable results, as even low doses of the nanoparticle-dsRNA complexes triggered complete silencing of the targeted genes in the larvae, leading to a significant drop in enzyme activity and 100% mortality.” Importantly, the spray demonstrated non-toxicity to beneficial insects such as Drosophila and Spodoptera and showed no cytotoxic effects in vitro.
The innovative solution was also field-tested at Agricultural College, MPKV, Pune, with the assistance of students Henry Kolge and Karthiki Kadam. The results were promising: two applications of the nano-RNAi spray effectively safeguarded crops from pod borer invasion, delivering protection levels comparable to conventional chemical sprays, while promoting high yields and minimal pod damage. The absence of phytotoxicity further underscores the safety of this approach for plants.
“Nanomediated delivery of RNAi is a specific approach to address the issue of insect resistance,” stated Ghormade. She emphasized that under the DST-SERB-sponsored initiative, they successfully developed the nano-RNAi spray targeting Helicoverpa armigera, confirming both efficacy against insect targets and safety for non-target species during laboratory tests.
The promising results from field trials indicate the potential of this technology for large-scale agricultural application. Further multi-location trials and ecological safety studies could expand the benefits of this innovation, heralding a new era of bioinsecticides that are environmentally friendly and highly specific, addressing the escalating challenge of pest resistance in modern agriculture.
This pioneering work marks an important leap forward in sustainable pest management, reinforcing the critical need for innovative solutions to secure crop production while safeguarding environmental health.
Categories: Agriculture, Biotechnology, Sustainability
Tags: RNA interference, Helicoverpa armigera, chickpeas, sustainable agriculture, eco-friendly pest control
Original Source: https://www.hindustantimes.com/cities/pune-news/scientists-develop-eco-friendly-spray-to-combat-chickpea-pest-helicoverpa-armigera-101762627352243.html
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Publish Date: 2025-11-09 04:32:00
