Leadership Instincts: Our brain itself is a Quantum Computer Says New Research  |  Parent Interventions: Nice People May Make Worse Financial Decisions  |  Teacher Insights: Chocolate, the Right Food to Improve Your Brain Power  |  Leadership Instincts: Strong Bricks Can Be Made from Bio solids and Clay  |  Parent Interventions: Order of Birth in Family Has Influence on Intelligence  |  Cover Story: MIND THE NET  |  Technology Inceptions: Oppo’s 10X Lossless Hybrid Zoom Smartphone Camera Tech to Enter Mass Production   |  Technology Inceptions: AI Can Help Improve Understanding of Earth Science  |  Cover Story: THE CYBER BRAIN  |  Science Innovations: New treatment for osteoporosis   |  Technology Inceptions: SpaceX Protests NASA Launch Contract Award  |  Science Innovations: Cost-efficient catalysts  |  Technology Inceptions: NASA to Launch New Space Telescope in 2023 to Explore Origins of Universe  |  Leadership Instincts: Social Media Cannot Cause Depression  |  Parent Interventions: Maternal Grandmothers Can Raise Survival Rate of Grandchildren  |  
  • Pallikkutam Magazine
  • Companion Magazine
  • Mentor
  • Smart Board

February 13, 2018 Tuesday 02:30:43 PM IST
Herbicide-resistant weeds pose threat to global food security

13th February, 2018: First it was virus; and now it comes to the weeds! In a shocking discovery, the researchers of University of Sheffield, UK have found that herbicides are progressively becoming incapable of controlling weeds as the plants have evolved resistance against them. Researchers also warn of a serious threat to global food security on account of this development and calls for developing new strategies of weed control with reduced reliance on chemicals. The results are published in Nature Ecology & Evolution.

Scientists have mapped the density of black-grass populations across 70 farms in England, collecting seed from 132 fields. They also analyzed the historical management data for all fields to find out what drives the abundance of black-grass abundance and how do they develop herbicide-resistance.

“We found that the extent of herbicide resistance was primarily dictated by the historical intensity of herbicide use, and that no other management factors had been successful in modifying this resistance risk,” said Paul Neve, a weed biologist and leader of Rothamsted’s strategic programme, Smart Crop Protection and a co-author of the study.

On surveying farmers, the research team also found that the increased weed densities lead to higher herbicide costs and lower crop yields, resulting in significant losses of profit. They also found that Increasing resistance is linked to the number of herbicide applications, and mixing different chemicals or applying them cyclically did not prevent resistance developing.

The researchers recommend that farmers switch to weed-management strategies that rely less on herbicides, as it is inevitable that weeds will overcome even new agents. 

Comments