Navigation Links
Spread of crop pests threatens global food security as Earth warms

A new study has revealed that global warming is resulting in the spread of crop pests towards the North and South Poles at a rate of nearly 3 km a year. The study, published in the journal Nature Climate Change and carried out by researchers at the University of Exeter and the University of Oxford, shows a strong relationship between increased global temperatures over the past 50 years and expansion in the range of crop pests.

Currently 10-16% of global crop production is lost to pests. Crop pests include fungi, bacteria, viruses, insects, nematodes, viroids and oomycetes. The diversity of crop pests continues to expand and new strains are continually evolving. Losses of major crops to fungi, and fungi-like microorganisms, amount to enough to feed nearly nine percent of today's global population. The study suggests that these figures will increase further if global temperatures continue to rise as predicted.

The spread of pests is caused by both human activities and natural processes but is thought to be primarily the result of international freight transportation. The study suggests that the warming climate is allowing pests to become established in previously unsuitable regions. For example, warming generally stimulates insect herbivory at higher latitudes as seen in outbreaks of the Mountain pine beetle (Dendroctonus ponderosae) that has destroyed large areas of pine forest in the US Pacific Northwest. In addition, the rice blast fungus which is present in over 80 countries, and has a dramatic effect both on the agricultural economy and ecosystem health, has now moved to wheat. Considered a new disease, wheat blast is sharply reducing wheat yields in Brazil.

Dr Dan Bebber from the University of Exeter said: "If crop pests continue to march polewards as the Earth warms the combined effects of a growing world population and the increased loss of crops to pests will pose a serious threat to global food security."

Professor Sarah Gurr from the University of Exeter (previously at the University of Oxford) said: "Renewed efforts are required to monitor the spread of crop pests and to control their movement from region to region if we are to halt the relentless destruction of crops across the world in the face of climate change."

The study used published observations of the distribution of 612 crop pests collected over the past 50 years. It revealed that the movement of pests north and south towards the poles, and into new previously un-colonised regions, corresponds to increased temperatures during that period.


Contact: Jo Bowler
University of Exeter

Related biology news :

1. Protein involved in nerve-cell migration implicated in spread of brain cancer
2. Researchers describe potential for MERS coronavirus to spread internationally
3. CSI-style DNA fingerprinting tracks down cause of cancer spread
4. How cancer spreads: Metastatic tumor a hybrid of cancer cell and white blood cell
5. Bullfrogs may help spread deadly amphibian fungus, but also die from it
6. Vitamin D deficiency may help spread of hepatitis B throughout liver
7. First dual-action compound kills cancer cells, stops them from spreading
8. Widespread but neglected disease a health threat in Africa, Virginia Tech researchers say
9. Climate change will cause widespread global-scale loss of common plants and animals
10. Scientists alarmed by rapid spread of Brown Streak Disease in cassava
11. Viral curiosity spreads across continents
Post Your Comments:
(Date:10/26/2015)... PALO ALTO, Calif. and LAS ... – Nok Nok Labs , an innovator in ... FIDO Alliance , today announced the launch of its ... the first unified platform enabling organizations to use standards-based ... authentication. The Nok Nok S3 Authentication Suite is ideal ...
(Date:10/23/2015)... Oct. 23, 2015 Research and Markets ( ... "Global Voice Recognition Biometrics Market 2015-2019" report to ... --> The global voice recognition biometrics market to ... --> --> The ... prepared based on an in-depth market analysis with inputs ...
(Date:10/22/2015)...  Aware, Inc. (NASDAQ: AWRE ), a leading supplier of ... quarter ended September 30, 2015.  --> ... $4.0 million, a decrease of 33% compared to $6.0 million in ... of 2015 was $2.2 million, or $0.10 per diluted share, which ... same period a year ago.  --> ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... Nov. 24, 2015 /PRNewswire/ - Aeterna Zentaris Inc. ... that the remaining 11,000 post-share consolidation (or 1,100,000 ... (the "Series B Warrants") subject to the previously ... November 23, 2015, which will result in the ... effect to the issuance of such shares, there ...
(Date:11/24/2015)... ... November 24, 2015 , ... In harsh ... Insertion points for in-line sensors can represent a weak spot where leaking process ... series of retractable sensor housings , which are designed to tolerate extreme process ...
(Date:11/24/2015)... ... November 24, 2015 , ... Creation Technologies would like to ... Deloitte's 2015 Technology Fast 500 list of the fastest growing companies in North ... II medical device that speeds up orthodontic tooth movement by as much as ...
(Date:11/24/2015)... Capricor Therapeutics, Inc. (NASDAQ: ... development and commercialization of first-in-class therapeutics, today announced that ... scheduled to present at the 2015 Piper Jaffray Healthcare ... at The Lotte New York Palace Hotel in ... . --> . ...
Breaking Biology Technology: