Tag: "weeds" at biology news
Can hemp help the everglades?
.... Crops such as these can be effective in reducing weeds
and leaching while enriching soil. Sunn hemp can be grown to prevent soil erosion, as high-protein forage, and in older plants, it can be used to make cloth, twine, and rope. Results of this four year study, which has support from the South Florid...
Biocontrol of invasive water hyacinth contributes to socioeconomic and health improvements in Africa
...ornia crassipes, is one of the most invasive water weeds
in the world. A native of South America, it was spread throughout the tropics and subtropics in the last century, mostly by humans. While the plant can potentially be used for sewage treatment and biofuel production, it can also cause severe envi...
Weeds survive the wild better than natives
...source Sciences, has been investigating the effect weeds
can have on native plants especially when foliage ...er to another facilitating fertilisation - visited weeds
and natives, the attack by herbivores may have an unfair advantage for the weed. "Essentially it m...
Smithsonian scientists connect climate change, origins of agriculture in Mexico
... of the last ice age. Pollen and phytoliths from weeds
associated with crop plants become plentiful in the cores at roughly 6300 B.P Charcoal associated with agricultural burning practices also is abundant at that time. Between 1800 B.P. and 900 B.P., a major drying event occurred, corresponding to the t...
Annual plants may cope with global warming better than long-living species
...finding suggests that quick-growing plants such as weeds
may cope better with global warming than slower-growing plants such as Redwood trees -- a phenomenon that could lead to future changes in the Earth's plant life. "Some species evolve fast enough to keep up with environmental change," said Arthur Wei...
Pollinators help one-third of the world's food crop production
...mere tweaks to current practices, such as allowing weeds
and native plants to grow and prosper along the border of the primary crop, she said. Such non-crop plants, which are currently killed off by herbicides, can sustain a variety of wild bee species when the primary crops are not in bloom. Another cha...
Of I robots go solar; new system could drastically reduce herbicide use
...at's more, this robot has the potential to control weeds
while significantly reducing herbicide use. The robot uses GPS for navigation, and there are two small cameras mounted on a frame on top of the machine to give the robot depth perception, just like a human, said Lei Tian, agricultural engineer at t...
Fight weeds with plant pathogens
...eeds. "The use of plant pathogens to suppress weeds
is considered as one of the alternative weed contr...s in order to prevent the development of resistant weeds
or lessen the impact of herbicides on the environment," she said. Weed management is important due...
Why are there so many weeds in your garden this year?
...r objective in weed management has centered on how weeds
can be controlled. The emphasis on control, however, has obscured the overriding question of why weeds
are so abundant at certain times and places," write the authors. "This is an ecological question tha...
Bacteria can help predict ocean change
...le and could represent the bacterial equivalent of weeds
and other redundant plants. "Wherever we looked, we found predictable kinds, but within the groups there were always less predictable and more predictable members," Fuhrman said. "They're just like animals and plants in the way they function in ...
New flood-tolerant rice offers relief for world's poorest farmers
...s poorest people, and may reduce yield losses from weeds
in areas such as the United States, where rice is ...ng that the new gene will be useful in suppressing weeds
and reducing herbicide applications for conventional and organic rice farmers in developed countries...
New flood-tolerant rice offers relief for world's poorest farmers
...'s poorest people, and may reduceyield losses from weeds
in areas like the United States where rice isseede...ing that the new gene will beuseful in suppressing weeds
and reducing herbicide applications forconventional and organic rice farmers in developed countries ...
Steps made toward overcoming biological obstacles to cell therapy for cancer
...ear the base of the throat that both raises up and weeds
out blood cells involved in immune responses. One of the strategies being explored to eradicate established tumors is to increase the number of tumor-reactive T cells through immunization (often called a "cancer vaccine") or by growing large numbers...
Valuing biodiversity services, including its insurance against disease
...ar to have also caused the spread of unwelcome new weeds
while several species of frogs have gone extinct from diseases introduced through the importation from elsewhere of frogs as food and pets; How destroying wetlands increased human vulnerability to recent natural disasters; How the extinction and enda...
Vineyard weeds found to host Pierce's disease of grapes
...the September issue of Plant Disease suggests that weeds
commonly found in California's wine country may enable the spread of Pierce's disease of grapes, one of the most destructive plant diseases affecting grapes. Pierce's disease is caused by Xylella fastidiosa, a bacterium transmitted by sharpshooters a...
Trapped genes show how flower development is controlled
...a can be used to understand this process in crops, weeds
and trees. "If a gene is turned on only in one type of tissue or organ within a flower, the chance is good that the gene has an important role in development of that organ. From this collection of patterns of gene expression, we can gain interesting ...
Woods Hole Research Center plans controlled burn in Amazon rainforest
...azon today, as fires set by landholders to control weeds
in their pastures or to burn recently felled forest in preparation for planting often escape beyond their intended boundaries. Undisturbed forests are resistant to burning because their dense leaf canopy prevents all but a tiny portion of incoming so...
Plant pathologists evaluate eco-friendly alternatives to methyl bromide
...nt used to control soilborne fungi, nematodes, and weeds
of more than 100 crops worldwide. The phase out was based on methyl bromide's ability to deplete ozone and disrupt the UV protective ozone layer. The EPA determined that, under the Clean Air Act, this fumigant must be phased-out by 2001, but in compl...
Finding hidden invaders in a Hawaiian rain forest
...species, kahili ginger, one of the most disruptive weeds
in Hawaiian rain forests." Asner commented on the expanded effort with the multi-institutional team: "Because Hawaii contains so many different types of ecosystems, from desert grasslands to tropical rain forests, Carnegie's ecological remote sensing...
CSIRO finds a way to get more out of old cars
...rs no longer rust away disgracefully, overgrown by weeds
in remote country paddocks. Today they disappear into the jaws of huge shredding machines in metal recycling plants, along with broken washing machines, refrigerators and other metal wastes. The recycling plants recover the bigger bits of metal, but ...