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Tag: "pests" at biology news

Spider Venom Could Yield Eco-Friendly Insecticides

...ate environmentally friendly insecticides. Insect pests destroy about 25 percent of the world's crops each...esign insecticides that specifically target insect pests without affecting vertebrates. One approach is to create chemical insecticides that mimic the action...

Scientists discuss improved biopesticides for locust control in West Africa

...estation in West Africa the worst in 18 years. The pests invaded the region last summer, affecting millions of acres of farmland. The locusts are in recession now because they do not breed in the dry season, but when the annual spring rains begin, they are expected to return. Participants at the seminar i...

New winter hulless barley has high protein

...to develop wheat and barley cultivars resistant to pests and so require fewer chemical inputs. For example, producers would obtain higher yields of a safer and higher quality grain that is resistant to Fusarium head blight, commonly referred to as scab. Scab problems have occurred on an annual basis during...

Stealth Worms May Improve Insect Pest Control

...onmentally safe alternative for controlling insect pests in agricultural and forestry systems, and also for controlling insect pests of human and veterinary importance," Stock says. In each location the scientists start with biotic ...

Alarm pheromone causes aphids to sprout wings

...o reduce damage caused by aphids, the major insect pests in Europe, it may prove effective to apply pulses of alarm pheromone to infested fields. ...

Bugs, even 'bad' ones, can be educationally beneficial, new book says

...anted are considered weeds, insects are considered pests only when they adversely affect people, Waldbauer ...rate what we can learn from bad bugs. Many of the pests he describes are found in Illinois, including the corn rootworm. Other regional insects also are men...

UN: World in big ecological mess

...egulation of regional climate, natural hazards and pests ?increases the likelihood of potentially abrupt changes that will seriously affect human well-being. Its findings include: * More land was converted to agriculture since 1945 than in the 18th and 19th centuries combined. More than half of all the s...

University of Nevada, Reno research team discovers hormone that causes malaria mosquito to urinate

...esticide development is in making insecticides for pests which attack crops." This is what lead Schooley, ... path of finding a way to control insects that are pests at the larval stage, a path that has them instead potentially paving the way for better mosquito con...

Organic farms produce same yields as conventional farms

...cultural practices to supply nutrients and control pests and because labor costs average about 15 percent higher in organic farming systems, the higher prices that organic foods command in the marketplace still make the net economic return per acre either equal to or higher than that of conventionally prod...

From a Few Wild Ancestors, a Citrus Cornucopia

...ss interplay between citrus plants and their pesky pests and pathogens to carry on untouched—providing scientists with important glimpses into the plants?finely tuned, natural defenses. “But germplasm maintained in this manner is more vulnerable to natural disasters and other events that could destroy val...

Scientists find a maturity gene in fly

...ely devoted to growth," says Thummel. "Insects are pests because, in their larval form, they consume many times their body weight in food, which can include our crops. ?When babies are born, they are 7 or 8 pounds. By the time they are entering puberty, they are about 80 pounds. That's about a 10-fold incr...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...ely devoted to growth," says Thummel. "Insects are pests because, in their larval form, they consume many times their body weight in food, which can include our crops. ?When babies are born, they are 7 or 8 pounds. By the time they are entering puberty, they are about 80 pounds. That's about a 10-fold incr...

Techniques available to detect soil that inhibits destructive soybean pest

...ean-producing areas. "Using plants bred to resist pests is not the complete answer, so it's important to f...tode-suppressive soils to battle the root-dwelling pests and the limitations of the techniques. In previous research on a different cyst nematode, Westphal ...

Fighting malaria by manipulating mosquitoes' sense of smell

...er of other insect species, including agricultural pests and those that carry other human and animal diseases. The Grand Challenges initiative was launched by the Bill & Melinda Gates Foundation in 2003, in partnership with the National Institutes of Health, with a $200 million grant to the FNIH and i...

Biotech cotton 8: Bugs 0

...ss chemical insecticides than in the past. Insect pests sometimes evolve resistance to such chemicals in j...ead, pink bollworm was one of the top three insect pests of cotton in the Southwest. In 1995, losses from pink bollworm in Arizona cotton were estimated to b...

Plants have a double line of defence

... only to grass powdery mildew fungi but also other pests ?for example, the pathogens causing late potato blight. PEN2 is therefore a basic component of the plant's immune system with a broad range of effects. However if PEN2 is missing, the plant is not completely helpless against fungal diseases. There i...

New GM mosquito sexing technique is step towards malaria control, report scientists

...has proven effective in controlling several insect pests when methods for sorting sex are available. "Female mosquitoes are responsible for spreading malaria, and also for damage to crops, but they are only able to breed once before dying. By forcing females to breed with sterile males, we can stop them c...

Plants give pests sock in the gut

...cal pesticides such as the Bt toxin to prevent the pests from developing resistance and making the toxin more effective. "The enzyme is found in insect-resistant strains of corn, and it breaks down proteins and peptides in the insects' gut. It is a unique active defense against herbivory," says Dawn Luthe...

New possibilities to fight pests with biological means

...lopment of crop plants with a better resistance to pests (PNAS, Early Edition, January 16-20, 2006). At least 15 species of plants are known to release scents after insect damage, thus attracting the enemies of their enemies. Scientists term this mechanism "indirect defence". A previous cooperation by th...

'Biobullets' fight harmful mussels

...). In all, the researchers note, coping with these pests costs upward of $5 billion annually. Without many natural predators, zebra mussels have rapidly spread and are now found in 21 states including Oklahoma, Louisiana and Vermont, according to the USGS. Unchecked, many scientists suspect zebra mussels ...

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