Scientists have identified a chemical compound released by locusts that causes them to swarm, opening the door to new ways to prevent these insects from devouring crops vital to human sustenance as they have for millennia.
Researchers said on Wednesday they identified the pheromone – a chemical produced by an animal that affects the behaviour of others of its own species – in the world's most widespread locust species, the migratory locust, or Locusta migratoria.
Called 4-vinylanisole (4VA), it is primarily released from the hind legs and is detected by the antennae of other locusts and sensed by odorant receptors, the researchers said.
4VA powerfully attracted locusts regardless of age or sex, the research published in the journal Nature showed. Its production was triggered in the insects when as few as four to five solitary locusts came together, precipitating swarming behaviour.
"In human history, locust plagues, drought and flood were considered as three major natural disasters which caused serious agricultural and economic losses all over the world," said research leader Kang Le, a professor of entomology and ecology at the Chinese Academy of Sciences' Institute of Zoology.
"As the most widely distributed and one of the most dangerous locust species, the migratory locust represents a serious threat to agriculture worldwide," Dr Kang said.
Swarms can include billions of locusts and span hundreds of square kilometres as the insects voraciously consume crops, imperilling food security. Migratory locusts inhabit Asia, Africa, Australia and New Zealand, attacking pastures and critical crops such as wheat, rice, corn, millet, barley, oats, sugar cane and sorghum.
Dr Kang said further research is needed on whether 4VA exists in other locust species, such as the desert locust, Schistocerca Gregaria,which is ravaging parts of Africa and the Middle East.
The chemical insecticides currently used to suppress locust outbreaks raise concerns about human health and safety. The identification of 4VA could inspire new methods.
A chemical could be developed to block 4VA's effects to prevent swarming, Dr Kang said, or a synthetic version could lure locusts into traps to be killed. Locusts genetically modified not to respond to 4VA could be developed and released to establish wild non-swarming populations, "subject to biosecurity evaluation", Dr Kang said.
Key findings of Jenkins report
- Founder of the Muslim Brotherhood, Hassan al Banna, "accepted the political utility of violence"
- Views of key Muslim Brotherhood ideologue, Sayyid Qutb, have “consistently been understood” as permitting “the use of extreme violence in the pursuit of the perfect Islamic society” and “never been institutionally disowned” by the movement.
- Muslim Brotherhood at all levels has repeatedly defended Hamas attacks against Israel, including the use of suicide bombers and the killing of civilians.
- Laying out the report in the House of Commons, David Cameron told MPs: "The main findings of the review support the conclusion that membership of, association with, or influence by the Muslim Brotherhood should be considered as a possible indicator of extremism."
Jetour T1 specs
Engine: 2-litre turbocharged
Power: 254hp
Torque: 390Nm
Price: From Dh126,000
Available: Now
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While you're here
Key facilities
- Olympic-size swimming pool with a split bulkhead for multi-use configurations, including water polo and 50m/25m training lanes
- Premier League-standard football pitch
- 400m Olympic running track
- NBA-spec basketball court with auditorium
- 600-seat auditorium
- Spaces for historical and cultural exploration
- An elevated football field that doubles as a helipad
- Specialist robotics and science laboratories
- AR and VR-enabled learning centres
- Disruption Lab and Research Centre for developing entrepreneurial skills
UPI facts
More than 2.2 million Indian tourists arrived in UAE in 2023
More than 3.5 million Indians reside in UAE
Indian tourists can make purchases in UAE using rupee accounts in India through QR-code-based UPI real-time payment systems
Indian residents in UAE can use their non-resident NRO and NRE accounts held in Indian banks linked to a UAE mobile number for UPI transactions
US%20federal%20gun%20reform%20since%20Sandy%20Hook
FA Cup semi-finals
Saturday: Manchester United v Tottenham Hotspur, 8.15pm (UAE)
Sunday: Chelsea v Southampton, 6pm (UAE)
Matches on Bein Sports
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Champions League quarter-final, first leg
Manchester United v Barcelona, Wednesday, 11pm (UAE)
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Disability on screen
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Some of Darwish's last words
"They see their tomorrows slipping out of their reach. And though it seems to them that everything outside this reality is heaven, yet they do not want to go to that heaven. They stay, because they are afflicted with hope." - Mahmoud Darwish, to attendees of the Palestine Festival of Literature, 2008
His life in brief: Born in a village near Galilee, he lived in exile for most of his life and started writing poetry after high school. He was arrested several times by Israel for what were deemed to be inciteful poems. Most of his work focused on the love and yearning for his homeland, and he was regarded the Palestinian poet of resistance. Over the course of his life, he published more than 30 poetry collections and books of prose, with his work translated into more than 20 languages. Many of his poems were set to music by Arab composers, most significantly Marcel Khalife. Darwish died on August 9, 2008 after undergoing heart surgery in the United States. He was later buried in Ramallah where a shrine was erected in his honour.
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Bareilly Ki Barfi
Directed by: Ashwiny Iyer Tiwari
Starring: Kriti Sanon, Ayushmann Khurrana, Rajkummar Rao
Three and a half stars
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Dunbar
Edward St Aubyn
Hogarth
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more from Patrick Noack
10 tips for entry-level job seekers
- Have an up-to-date, professional LinkedIn profile. If you don’t have a LinkedIn account, set one up today. Avoid poor-quality profile pictures with distracting backgrounds. Include a professional summary and begin to grow your network.
- Keep track of the job trends in your sector through the news. Apply for job alerts at your dream organisations and the types of jobs you want – LinkedIn uses AI to share similar relevant jobs based on your selections.
- Double check that you’ve highlighted relevant skills on your resume and LinkedIn profile.
- For most entry-level jobs, your resume will first be filtered by an applicant tracking system for keywords. Look closely at the description of the job you are applying for and mirror the language as much as possible (while being honest and accurate about your skills and experience).
- Keep your CV professional and in a simple format – make sure you tailor your cover letter and application to the company and role.
- Go online and look for details on job specifications for your target position. Make a list of skills required and set yourself some learning goals to tick off all the necessary skills one by one.
- Don’t be afraid to reach outside your immediate friends and family to other acquaintances and let them know you are looking for new opportunities.
- Make sure you’ve set your LinkedIn profile to signal that you are “open to opportunities”. Also be sure to use LinkedIn to search for people who are still actively hiring by searching for those that have the headline “I’m hiring” or “We’re hiring” in their profile.
- Prepare for online interviews using mock interview tools. Even before landing interviews, it can be useful to start practising.
- Be professional and patient. Always be professional with whoever you are interacting with throughout your search process, this will be remembered. You need to be patient, dedicated and not give up on your search. Candidates need to make sure they are following up appropriately for roles they have applied.
Arda Atalay, head of Mena private sector at LinkedIn Talent Solutions, Rudy Bier, managing partner of Kinetic Business Solutions and Ben Kinerman Daltrey, co-founder of KinFitz
Wicked: For Good
Director: Jon M Chu
Starring: Ariana Grande, Cynthia Erivo, Jonathan Bailey, Jeff Goldblum, Michelle Yeoh, Ethan Slater
Rating: 4/5
Top 10 most polluted cities
- Bhiwadi, India
- Ghaziabad, India
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- Jaunpur, India
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- Noida, India
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New UK refugee system
- A new “core protection” for refugees moving from permanent to a more basic, temporary protection
- Shortened leave to remain - refugees will receive 30 months instead of five years
- A longer path to settlement with no indefinite settled status until a refugee has spent 20 years in Britain
- To encourage refugees to integrate the government will encourage them to out of the core protection route wherever possible.
- Under core protection there will be no automatic right to family reunion
- Refugees will have a reduced right to public funds
MOUNTAINHEAD REVIEW
Starring: Ramy Youssef, Steve Carell, Jason Schwartzman
Director: Jesse Armstrong
Rating: 3.5/5
Tomorrow 2021
Plastic tipping points
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W.
Wael Kfoury
(Rotana)
David Haye record
Total fights: 32
Wins: 28
Wins by KO: 26
Losses: 4
AndhaDhun
Director: Sriram Raghavan
Producer: Matchbox Pictures, Viacom18
Cast: Ayushmann Khurrana, Tabu, Radhika Apte, Anil Dhawan
Rating: 3.5/5
The specs: 2017 Porsche 718 Cayman
Price, base / as tested Dh222,500 / Dh296,870
Engine 2.0L, flat four-cylinder
Transmission Seven-speed PDK
Power 300hp @ 6,500rpm
Torque 380hp @ 1,950rpm
Fuel economy, combined 6.9L / 100km
Results
5pm: Maiden (PA) Dh80,000 (Turf) 1,200m. Winner: Majd Al Megirat, Sam Hitchcott (jockey), Ahmed Al Shehhi (trainer)
5.30pm: Handicap (PA) Dh80,000 (T) 1,600m. Winner: Dassan Da, Patrick Cosgrave, Helal Al Alawi
6pm: Abu Dhabi Fillies Classic Prestige (PA) Dh110,000 (T) 1,400m. Winner: Heba Al Wathba, Richard Mullen, Jean de Roualle
6.30pm: Abu Dhabi Colts Classic Prestige (PA) Dh110,000 (T) 1,400m. Winner: Hameem, Adrie de Vries, Abdallah Al Hammadi
7pm: Wathba Stallions Cup Handicap (PA) Dh70,000 (T) 2,200m. Winner: Jawal Al Reef, Richard Mullen, Ahmed Al Mehairbi
Handicap (TB) Dh100,000 (T) 2,200m. Winner: Harbour Spirit, Adrie de Vries, Jaber Ramadhan.
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