Articles tagged with Insects
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A study by French and American scientists found that enzyme synthesis of steroids in humans is unrelated to those in insects, snails, octopuses, and corals. This discovery suggests a 'snail-centered viewpoint' for understanding the effects of environmental chemicals on steroid synthesis.
In a study on female water striders, researchers found that females use morphological shields to protect their genitalia from male attempts at copulation. In response, males produce a courtship song by tapping the water surface, allowing females to expose their genitalia only after receiving the signal.
A new species of pink-winged moth, Lithophane leeae, has been identified by University of Arizona biologist Bruce Walsh in the Chiricahua Mountains. The discovery highlights the region's vast biodiversity and suggests that more individuals may exist, considering the moth's habits.
Researchers found that combining bed bugs' alarm pheromones with desiccant dusts made treatment more effective at killing the bugs. The blend of two pheromones applied in concert with a silica gel desiccant dust proved to be the most lethal combination.
Researchers at UC Riverside will explore the development of novel olfactory repellents to prevent mosquito-human contact and reduce malaria transmission. The project aims to identify odors that inhibit mosquitoes' ability to detect human hosts, potentially leading to effective and environmentally safe insect repellents.
A new study reveals the source of silkworms' attraction to mulberry leaves is a jasmine-scented chemical called cis-jasmone. The potent attractant triggers a highly tuned olfactory receptor in the silkworms' antennae, guiding them towards the food source.
A parasitic bacterium may reduce mosquito lifespan and limit dengue fever transmission. Infected mosquitoes become more active as they age, but their activity levels don't increase further.
Research found that tiny mites living on Madagascar hissing cockroaches decrease the presence of molds, reducing allergic responses. The mites eat saliva and debris, eliminating material that fosters mold growth on the insects' bodies.
Research by UC Riverside biologists reveals that female field crickets learn to recognize attractive male characteristics through song, influencing their mate selection. This finding underscores the importance of social effects in models of evolution, suggesting that insects possess complex cognitive capacities.
Grapevine flowers' fragrance comes from pollen grains stored in anthers, contrary to common perception that petals produce perfume. The scent serves as a defense mechanism to protect male reproductive tissues from predatory insects.
A recent review of published articles suggests bed bug bites are unlikely to transmit disease, but may cause skin reactions. Effective treatments for symptomatic bed bug bites have not been established, and eradication is complicated by insecticide resistance.
Removing non-native trout from mountain lakes reverses their impact on aquatic insect populations. Aquatic insect abundance increases quickly after trout removal, but suspension of stocking alone is ineffective in restoring insect numbers.
Charles Summers, a University of California entomologist, has won the prestigious Woodworth Award for his contributions to entomology. He developed economic thresholds and management strategies for various crops, reducing pesticide use and improving yields.
Dr. G. V. P. Reddy's $60,000 SARE grant will educate agricultural professionals on semiochemicals for monitoring and controlling pests like banana root borer and New Guinea sugarcane weevil.
A new study forecasts the likelihood of climate factors matching at geographically distant airline departure and destination points, enabling more efficient detection and interception of invasive species. The model uses recent forecast data for climate change and air traffic volumes, predicting a peak risk in June 2010.
Researchers found that reduced light quality leads to decreased sensitivity to jasmonic acid, a hormone involved in plant defense. This allows plants to redirect resources away from defense and towards growth, but may increase vulnerability to herbivores in densely planted crops.
A new study forecasts when climate factors will match at geographically distant airline departure and destination points, helping to detect and intercept invasive species. The findings provide a framework for monitoring airline flights and planning more efficiently.
Researchers used color infrared photography to detect diseases in greenhouse plants, identifying common ailments like sooty mold and powdery mildew through image analysis. The study found that certain diseases can be detected early on by analyzing the ratios of light reflection, with high NIR values indicating healthy vegetation.
A new species of fruit fly emerged after changing its mating behavior, while parasitic wasps evolved to prey on the flies' larvae. This study shows biodiversity feeds on itself, opening up niches for other species.
Researchers have created gene-engineered male flies that die as embryos, outcompeting wild pests and reducing crop damage. This new method of pest control eliminates the need for radiation, increasing safety and effectiveness.
Researchers Annemarie Surlykke and Elizabeth Kalko measured the volume of two 'whispering' bat species' calls, discovering they were actually shrieking at levels up to 110 decibels. The findings suggest that these bats use high-volume calls for echolocation in complex forest environments.
Scientists are working on a new strategy to prevent the spread of mosquito-borne diseases by disabling insects from transmitting viruses. The approach targets ticks, sand flies, and mosquitoes, which are responsible for most deaths worldwide.
A new study at the University of Melbourne discovered that rare insect clones are favored by evolution, leading to increased genetic variation. This phenomenon, known as frequency-dependent selection, allows rare clones to become more common and produce more offspring.
Researchers found that midges prefer ponds with high polarization levels, which may be related to nutrient content. This discovery could help control midge numbers and minimize cholera transmission by offering alternative, polarized light-reflecting water sources.
Walter Leal, a UC Davis professor, received the ESA award for his groundbreaking research on mosquito repellent DEET. His lab discovered the mode of action for DEET, which doesn't mask the host's smell but rather repels mosquitoes through direct detection.
A new article in American Entomologist reveals that Formosan subterranean termites played a significant role in the destruction of New Orleans' floodwall system. The termite species, originating from China, was found to have caused major breaks in the levees by digging networks of tunnels and undermining the structure.
Scientists trained a species of moth to link specific scents with sugar water rewards, discovering that the interval between odor presentation and reward is crucial for learning. This process allows integration of neural activities and represents a key finding in understanding how associations are built between stimuli and behavior.
Researchers found that froghoppers store energy in a composite structure made of hard cuticle and resilin, flexing it like an archery bow before releasing the energy for a powerful jump. This technique allows them to achieve remarkable heights, over 100 times their body length.
Scientists in Montana found that an introduced fly may worsen the effects of a widely invasive plant. The fly's larvae induce the plant to grow tissue around them, reducing its energy for seed production. Deer mice prey on the larvae, further boosting mouse population size and negatively impacting native plants.
Researchers identified flies' planning behavior, which occurs approximately 100 milliseconds earlier than previously known components of the escape response. The study found that flies carefully position their center of mass relative to jumping legs to propel themselves away from threats.
Mosquitoes avoid DEET because of its bad smell, which is detected by specific neurons on their antennae. The study corrects long-standing erroneous dogma about DEET's mode of action, providing new insights into the development of more effective repellents.
Researchers Dagmar Voigt and Stanislav Gorb from the Max-Planck Institute for Metals Research discovered that mirid bugs' non-stick surface disrupts the adhesive properties of Roridula gorgonias' glue. The team found that the mirid bug's greasy coating prevents the glue from adhering to its surface, allowing it to evade capture.
Researchers discovered insects use air bubbles to survive underwater, but find limits to depth and surface area. The study found bugs can dive as deep as 30 meters without bubble rupture.
A team of scientists discovered that mirid bugs possess a 30 times thicker coating than blowflies, which disrupts the glue's adhesive powers, allowing them to escape. The unique greasy layer prevents the glue from forming discrete blobs, instead running like a fluid over the surface.
Researchers found aphids are appearing significantly earlier in the year and in higher numbers due to mild winters. This leads to more aphids flying in spring and early summer when crops are vulnerable.
Social spiders have developed a unique foraging strategy that enables them to capture larger prey despite declining individual catch rates with colony size. This efficiency allows colonies to thrive in tropical areas but dwindle in higher elevations and latitudes.
Research at MIT shows how insects trap air on their bodies to create an external lung, enabling them to stay underwater indefinitely. The stability of the bubble depends on the spacing of hairs on the insect's abdomen, which must be balanced with surface area for breathing.
A North Carolina State University study found that examining an insect's 'family tree' can help predict a cousin insect's level of tolerance to pollutants. The research used 21 species of insects from different families to test their sensitivity to cadmium, a toxic metal.
Researchers at the University of Illinois have identified a key detoxifying protein in Anopheles mosquitoes that metabolizes DDT, a synthetic insecticide used to control malaria-spreading mosquitoes. The protein CYP6Z1 belongs to a class of cytochrome P450 monooxygenases that play key roles in insect defenses against plant toxins.
A recent study published in Science Cornell College biology professor Marty Condon and coauthors discovered multiple new species of fruit flies with overlapping niches, exceeding previous expectations. The research found a greater specialization in plant feeding among herbivorous insects than previously thought.
Tropical species will experience reduced health and population growth rates due to global warming, while high-latitude species may benefit slightly from warmer temperatures. The impacts of global warming on species in the tropics will be more detrimental than those in high latitudes.
Researchers found that bats emit exceptionally loud sounds of up to 140 dB SPL to detect small insects in air using echolocation. The study's results showed that the high frequencies emitted by the bats serve as a countermeasure to attenuation, allowing them to effectively hunt despite the limitations of ultrasonic frequencies.
Researchers at Ohio State University identify two genes that regulate mosquito growth and diapause, a hibernation-like state of arrested development. By disrupting these genes, scientists can mimic hormonal shifts that initiate diapause and disrupt fat retention, pointing to separate functions for each gene.
The American Association for the Advancement of Science (AAAS) is expanding its online journal Science Signaling, which focuses on new insights for combating disease and understanding normal human biology. Dr. Michael B. Yaffe will serve as Chief Scientific Editor, aiming to attract and publish top-notch signaling research.
Researchers at Rockefeller University and the University of Tokyo found that insects use fast-acting ion channels to smell odors, a major break with previous understanding. This new strategy allows for direct detection of odor molecules, bypassing complex biological apparatus previously thought to be necessary.
New Bt corn varieties have shown reduced levels of aflatoxin and lower rates of fungal infection, offering a potential solution to the global threat of this deadly toxin. The developments come as part of Monsanto's efforts to engineer better corn crops resistant to insect pests and environmental stressors.
Over 400 alien species are now considered invasive in China, with many causing significant harm to the environment. The rapid growth of China's industrial infrastructure is making it easier for organisms to spread and establish themselves throughout the country.
Researchers at Ohio State University identified 14 types of mold on and around Madagascar hissing cockroaches, including molds associated with allergies. Handling the insects may trigger allergic responses in sensitive individuals if proper cleaning and care are not taken.
Scientists at Rockefeller University have pinpointed DEET's molecular target in insects, showing that the widely used bug repellent acts like a chemical cloak, masking human odors. By targeting specific receptors, DEET confuses mosquitoes and prevents bites.
A combination of an insect protein and Bt toxin kills crop pests more effectively than either ingredient alone, inhibiting growth rate and reducing resistance. Researchers found a synergistic effect increasing mortality rates by over 10 times.
Researchers found that male yellow jacket paternity has no impact on colony dynamics, with females exhibiting cooperative behavior despite multiple mating. The study suggests a benefit to colonies for queens having multiple partners, leading to increased success and reproductive output.
Recent decades have seen a significant shift in oil palm research, with an increasing focus on the environment and biofuel production. However, biodiversity assessments remain scarce, particularly for insect species that carry out key ecosystem functions.
Research finds link between temperature and insect feeding on leaves, boosting foraging of plant-eating insects. The study links past climate spike to increased insect damage.
Researchers analyzed fossil leaves to understand the impact of climate change on insect populations, finding a correlation between temperature and herbivore damage. The study suggests that increased insect feeding will be a net effect of anthropogenic carbon dioxide increase and warming temperatures.
Researchers found that New Zealand parsnips had lower levels of chemical defenses than those in Europe and North America, making them more susceptible to the parsnip webworm. The webworms are dramatically affecting the plant's ability to reproduce, with 75% of affected plants devoid of reproductive parts.
New research reveals symbiotic bacteria in black bean aphids can exhibit a disruptive 'Hyde' side, slowing insect growth while allowing bacterial proliferation. This discovery may lead to new methods for controlling insect pests without relying on insecticides.
Researchers found that vacuuming is an effective way to kill fleas, with a high success rate in killing adult fleas (96%) and destroying younger stages (100%). The study suggests that the physical abuse caused by the vacuum's brushes and fans leads to flea death.
A study by Jean Pierre Kapongo found that Muscidifurax raptor is an effective biocontrol agent for controlling fruit flies in vineyards. This method reduces the need for chemical pesticides, benefiting the environment and promoting agricultural sustainability.
A 390-million-year-old sea scorpion fossil found in Germany shows that ancient arthropods like spiders and insects were much larger than their modern-day equivalents. The fossil claw is over a foot-and-a-half long, indicating these creatures were among the largest extinct arthropods.
Scientists have discovered a giant fossilized claw from an ancient sea scorpion, indicating that the creature was approximately 2.5 meters long and much taller than the average man. This finding suggests that spiders, insects, crabs, and similar creatures were larger in the past than previously thought.