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Tag: "insect" at biology news

The insect vector always bites twice

...order to be transmitted to the human host when the insect bites again to take another blood meal. Morbidity ...ated with the degree of exposure of the subject to insect vector bites. The vector saliva, which is adapted for blood feeds, plays a prime role in the tra...

Caribbean frogs started with a single, ancient voyage on a raft from South America

...and could include plants that trap fresh water and insect food for frogs," Hedges said. It is not likely that the frog species dispersed simply by swimming because frogs dry easily and are not very tolerant of salt water. In addition to the study's discoveries about Caribbean and Central American frogs,...

Undergraduate research shows leaderless honeybee organizing

...erhaps the most studied and economically important insect on Earth. Beyond agriculture, the finding may also have key implications for understanding the dynamics of all social animals, including man. Pierce’s recently reported his research in an article appearing in the behavioral biology research journa...

Revealed -- Mosquito genes that could be controlling the spread of killer viruses

...sms by which a pathogen either survives inside the insect body, or is killed by the insect’s defences.” T... in response to the different pathogens which each insect species encounters”, says Dr Christophides. Professor Fotis Kafatos, senior researcher of Imperia...

Genome of Clostridium botulinum reveals the background to world's deadliest toxin

... a range of genes that allow it to attack the many insect and other small creatures that live in the soil. The ‘chitinases’ produced by these genes can degrade the casing of insects and small crustaceans. It is not only animals that can feel the wrath of C. botulinum, explains Dr Sebaihia: "The soil can...

For many insects, winter survival is in the genes

...red heat-shock proteins, Hsp70, in five additional insect species that aren't related to the flesh fly. Each insect is a fairly common agricultural pest: the gypsy moth, the European corn borer, the walnut husk maggo...

Scientists discover rare 'gene-for-gene' interaction that helps bacteria kill their host

...the plague bacterium uses a single gene to out-fox insect immune defences and kill its host. In research pu...ortant biocontrol organism that is used to control insect pests and reduces pesticide use, so the more we know about it, the more useful it can be. "Insec...

New knowledge improves rice quality

...eties that would boost production and provide some insect and weed resistance to help farmers reduce their use of pesticides; quality was not a high priority. However, major new advances in rice research and Asia’s continuing economic development have created important new opportunities. "These are the t...

Scientists: As rainfall changes, tropical plants may acclimate

...th, such as those that hold sway over pollinators, insect predators or invasive plants. "These plants should be able to do OK in terms of their nitrogen nutrition, even with the climate changing," said Ted Schuur, a UF assistant professor of ecology and one of four authors of the paper. "But of course, w...

Scientists seek useful traits in wild cottons

...bsolete and wild cottons for useful traits such as insect and disease resistance, and drought, salt and cold... Other Lubbock scientists are examining natural insect and disease resistance in obsolete and wild cottons. This resistance could lead to more "environment...

Whiteflies and plant viruses can help each other to speed up biological invasion

... "This is the first study that shows an invasive insect has such a mutualistic relationship with the viruses it transmits, whereas its indigenous counterpart does not," said Professor Shu-Sheng Liu, corresponding author of the study, from the Institute of Insect Sciences, Zhejiang University. "We believe ...

2 brains -- 1 thought

...works that generate repetitive patterns - like the insect walking pattern - are already well-understood. Has evolutionary pressure kept the structural complexity of such networks to a minimum - or could there have been other networks with an even simpler structure, yet possessing the same dynamics? Is it po...

Male-killing bacteria makes female butterflies more promiscuous

...of male-killing bacteria active in many species of insect including the butterfly, actually increases female...d male fatigue. The team found that when the male insect population drops -- killed off by the bacteria -- the female butterfly becomes more sexually rampant...

Scientists find genes involved in the battle between Hessian flies and wheat

...e Research Service scientists trying to thwart the insect have identified Hessian fly genes that nullify tox... focus of our work is to try to understand how the insect overcomes plant resistance and use that basic knowledge to enhance the durability of wheat against H...

Bypassing eggs, flu vaccine grown in insect cells shows promise

An experimental flu vaccine made in insect cells ?not in eggs, where flu vaccines currently a...ainst human papilloma virus is made using the same insect cell line used in the JAMA study. In the study conducted by Treanor, together with colleagues at ...

Secret of worm's poison pill box protein could produce new natural insecticide

...een known that nematode worms can infect and kill insect pests with the help of a bacterium which they harb...of the insect. The toxin not only kills the target insect but prevents other predators from eating the body giving free reign to the nematode worms to consume...

Yale biologists 'trick' viruses into extinction

...ere farmers use non-harvested 'trap crops' to lure insect pests. Because the pests prefer the taste of the trap crops, only these plants need to be sprayed, reducing the amount of pesticide use." Turner believes that similar trickery might be used against human viruses like HIV. He notes that HIV recogn...

Wheat can fatally starve insect predators

...gated new, long-term methods to protect wheat from insect damage. "This is a different kind of defense th...he interactions, we can really understand what the insect says to the plant and how the plant responds," Williams said. The Hessian fly, which German merce...

Is there a pilot in the insect?

... that can reproduce much of the mysterious natural insect behavior. Their work is published online in Curren... speed/altitude ratio, at a constant value. If the insect changes speed, this reflex will make it change altitude so that ratio remains constant. Adjusting th...

Post oak grasshoppers emerging

...resence even more obnoxious by leaving frass -- or insect excrement -- behind, which often leaves a near-permanent stain, Behmer said The stain is the result of tannins -- the compound used in tanning leather -- which are found in oak leaves. As the frass dries, the tannins bind strongly to other chemicals....

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