HOME >> BIOLOGY >> NEWS
International trade imperils U.S. plants, animals and crops

e the Russian wheat aphid, that attack crops; parasitic plants like witch weed, which now affect corn farmers; or weeds, such as thistles, that invade cropland. Alien weeds like spotted knapweed, star thistle and cheat grass reduce the quality of rangeland for grazing cattle, while fungi and insects plague both croplands and forest trees. A recent arrival is the Asian long-horned beetle, first detected only in the past three years, now feasting on hardwood trees in the Northeast.

"This beetle came over from China in wood packaging material and is destroying street trees in several cities in the East," she said. "It has a very wide host range and, while it is currently feasting on a variety of maple species, it has the potential to expand to many other types of trees."

Crop weeds accounted for $26 billion in loss and control last year, while agricultural pests cost the country $14.4 billion, according to the report in Bioscience. Forest pests, on the other hand, cost $2.1 billion, counting control costs and lost production. Fire ants alone accounted for a billion dollars last year in control costs and the loss of rangeland in the Southeast and Texas.

Apart from economic damage, however, these invaders upset the ecosystem, preying on native species, outcompeting them and spreading disease. They also can alter ecosystem processes to the point that the systems can no longer support native species. Non-indigenous species are second only to land use change in causing species extinction, D'Antonio said.

"I don't think any native communities are entirely resistant to invasion," she said. "With repeated introduction of new propagules, you increase the probability that a few of them will establish themselves, and eventually some will cause the extinction of native species."

Propagules are larvae, seeds or pieces of plants or fungi capable of developing into mature adults.

One of the major sources of alien pathogens such as fungi are nursery pl
'"/>

Contact: Robert Sanders
rls@pa.urel.berkeley.edu
510-643-6998
University of California - Berkeley
19-Feb-2000


Page: 1 2 3 4

Related biology news :

1. International study findings link acne-like rash to effectiveness of new targeted cancer treatment
2. USAID, Conservation International & Starbucks launch Conservation Coffee Alliance in Central America
3. ConocoPhillips & Conservation International launch Biodiversity Action Plan in Venezuela
4. A room with a view for the International Space Station: Completion of the cupola observation module
5. International symposium on nutritional genomics
6. First International Scientific Conference on Childhood Leukaemia
7. 1st International Conference on Cell Therapy for Cardiovascular Disease
8. International research conferences at the Villa Vigoni
9. Conservation International & SC Johnson invest in Ecuadors rainforest to offset climate impacts
10. STN International launches Derwent World Patents Index First View
11. Media invited to attend International Society For Heart & Lung Transplantation meeting April 21-24

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: International trade imperils plants animals and crops

(Date:7/29/2014)... science, Clment Vidal takes on big philosophical questions in ... our universe have a beginning and an end, or ... What is the role of intelligent life, if any, ... philosophical rigor, the book presents an evolutionary worldview where ... but may well be the key to unlocking the ...
(Date:7/29/2014)... Northern Territories in Canada and have sent smoke drifting ... on. NASA,s Aqua satellite collected this natural-color image ... July 26, 2014. Actively burning areas, detected by MODIS,s ... smoke are drifting northward in this image. Smoke ... Fire has caused power outages in the area and ...
(Date:7/29/2014)... of Dentistry (UM SOD) and Medicine (UM SOM) ... five-year $10.7 million grant award from the National ... the National Institutes of Health to study the ... The grant, which renews a previous $12 million ... for the research by studying chlamydial and gonorrheal ...
Breaking Biology News(10 mins):Book: 'The Beginning and the End' 2University of Maryland Schools of Dentistry and Medicine receive NIH grant 2University of Maryland Schools of Dentistry and Medicine receive NIH grant 3University of Maryland Schools of Dentistry and Medicine receive NIH grant 4
(Date:7/29/2014)... team of researchers has created a new way ... textures. These surfaces, made by self-assembly of carbon ... including controllable mechanical stiffness and strength, or ... direction. , "We have demonstrated that mechanical forces ... complex three-dimensional microstructures, and that we can independently ...
(Date:7/29/2014)... biofuels are a viable solution to the dilemma of climate ... very cheap, this is affecting the biofuels market in North ... be in comparison to natural gas. This, in conjunction ... renewable energy developers to get the economics to work and ... companies have shifted their focused within renewable energy. ...
(Date:7/29/2014)... SANTA CLARA, Calif. , July 29, 2014 ... research services agreement with FORMA Therapeutics, Inc., to ... capabilities and proprietary fragment-based lead discovery platform for ... are really excited about the opportunity to work ... the fields of epigenetics and protein homeostasis. FORMA ...
(Date:7/29/2014)... July 29, 2014  ImmunoClin Corporation (IMCL) is ... treatment of infectious diseases as well as nutraceuticals. ... prevention of pathologies like cardiovascular disease, Alzheimer,s disease ... ImmunoClin Corporation will complete the strategic relocation of ... , a key center of North American ...
Breaking Biology Technology:A new way to make microstructured surfaces 2Renewable Waste Intelligence: Could Renewable Chemicals Be the Future for the Renewable Energy Industry? 2Nanosyn Announces Expanded Partnership With FORMA Therapeutics 2ImmunoClin Corporation (IMCL) Relocates Corporate Headquarters to Washington, DC 2ImmunoClin Corporation (IMCL) Relocates Corporate Headquarters to Washington, DC 3
Cached News: