Articles tagged with Insecticides
Two large-scale field studies reveal that neonicotinoids harm bees by reducing reproductive success and survival, with effects varying by environment. Neonicotinoid exposure also impairs worker bee life expectancy and queen colony stability.
A recent study by Emory University highlights the importance of insecticide-resistance monitoring in controlling the spread of Zika and other mosquito-borne diseases. The research found that applying insecticides like deltamethrin in areas with high resistance can be ineffective, emphasizing the need for targeted control measures.
Researchers at UC Riverside developed an inexpensive, biodegradable seaweed-based ant bait that reduced Argentine ant populations by 40-68% after four weeks. The hydrogel baits are highly absorbent and retain water to remain attractive to ants for extended periods.
The Elsevier Foundation Green and Sustainable Chemistry Challenge has awarded two prizes to innovative projects that use bioresources to address environmental issues in Brazil and Nigeria. Dr. Dênis Pires de Lima won the first prize for his project using cashew nuts to produce environmentally friendly insecticides, while Dr. Chioma Bla...
A new study by UC Santa Barbara scientists has found that landscape characteristics, such as crop diversity and field size, affect insecticide use. Crop diversity was shown to reduce insecticide use by 8kg per hectare in table grapes, while larger fields use more insecticide.
Researchers have identified DNA polymorphisms causing two knockdown resistance mutations in the pyrethroid and DDT target site gene of Phlebotomus argentipes sandfly. These mutations, similar to those found in mosquitoes, are linked with insecticide resistance and pose a significant threat to Leishmaniasis control.
Researchers found that one- and two-legged mosquitoes can bite humans and reproduce after losing multiple legs to insecticides. The study's findings suggest re-evaluating WHO testing guidelines for bed nets.
Research found reduced susceptibility to chlorfenapyr among three out of 10 bed bug populations, and five populations showed resistance to bifenthrin. The study suggests adherence to integrated pest management practices can slow the development of resistance.
Research suggests that exposure to common pesticides like pyrethroids may cause boys to reach sexual maturity earlier. A study of Chinese boys found a strong association between increased levels of the pesticide metabolite 3-PBA and accelerated puberty, including higher levels of testosterone.
A fungal biopesticide called Aprehend has been shown to be effective against bedbug populations with insecticide resistance. The study found that Aprehend achieved mortality rates of 95.5-99% in 14 days, compared to 16-40% for resistant strains exposed to pyrethroid insecticides.
A new method combining contact tracing with targeted indoor spraying of insecticide significantly reduces the spread of the dengue virus. The approach was found to be between 86 and 96 percent effective in controlling dengue fever during a 2009 outbreak in Cairns, Australia.
A study led by Emory University found that contact tracing combined with targeted indoor residual spraying reduced dengue transmission by 86-96% during an outbreak in Cairns, Australia. This approach is more effective than traditional vaccines, which offer only 30-70% effectiveness.
A genetic analysis reveals a gene region that enables mosquitoes to break down commonly used pyrethroid insecticides, leading to almost universal resistance. The study warns of the risk that current interventions may be compromised if resistance continues unabated.
Research suggests that exposure to insecticides like carbamates can disrupt melatonin receptor signaling, leading to a higher risk of metabolic diseases such as diabetes. The study highlights the need to assess environmental chemicals for their ability to disrupt circadian activity.
Common insecticides like neonicotinoids significantly reduce populations of predatory insects in North American and European farming systems, posing a threat to crop yields. The use of integrated pest management strategies is recommended to conserve beneficial insect species.
Researchers have discovered an experimental molecule that inhibits kidney function in mosquitoes, preventing resistance to conventional insecticides. The new compound, VU041, targets blood-feeding female mosquitoes and does not harm honeybees.
A five-year WHO investigation found treated bed nets continue to provide significant protection from malaria, despite rising insecticide resistance. The study supports the continued use of long-lasting insecticidal nets and calls for investments in new malaria-fighting tools to accelerate progress towards global elimination goals.
Researchers propose using insect repellents along with insecticides to drive mosquito evolution that yields greater aversion to repellents, potentially slowing malaria development. This strategy could extend the lifetime of current insecticides and reduce resistance by favoring repelled mosquitoes over those developing resistance.
Researchers propose using mathematical models to drive evolution in local mosquito populations, favoring those that stay outside and hindering the spread of malaria. This approach could lead to more effective repellents and slower insecticide resistance.
A study by University of Nebraska-Lincoln researchers found that exposure to imidacloprid, a popular insecticide, significantly reduces the number of eggs laid by queen bees. This impairment can lead to colony decline and death, highlighting the need for beekeepers to take precautions when using neonicotinoids.
A study published in PLOS Neglected Tropical Diseases suggests that treating cattle with fipronil can significantly reduce visceral leishmaniasis by killing sand flies. The treatment is most effective when applied regularly, but also depends on the timing relative to the sand fly lifecycle.
A new study found that sulfoxaflor is as effective as broad-spectrum insecticides in controlling soybean aphids, while causing less harm to beneficial predators like the convergent lady beetle and insidious flower bug. This could improve integrated pest management strategies and reduce the risk of insecticide resistance.
The International Vector Control Centre (IVCC) has received a $75 million grant from the Bill & Melinda Gates Foundation over five years. This funding will support IVCC's work in developing innovative vector control products and tools to prevent malaria transmission from mosquitoes to vulnerable populations.
A new study found that different strains of bed bugs have varying levels of resistance to insecticides, with some having oxidases and others esterases. The researchers used a synergist called EN16/5-1 to determine which enzyme type was responsible for the resistance.
New research reveals bed bugs have developed thicker cuticles to resist insecticides, making control efforts more challenging. Understanding this resistance mechanism could lead to the development of new strategies for effective bed bug control.
A new Bt technology could provide improved control of thrips and plant bugs in cotton, reducing the need for insecticide applications. The treatment has shown better plant protection than alternative strategies in field tests.
Researchers in Madagascar found high levels of insecticide resistance in the flea vector for plague, with only one out of 12 insecticides effective across all populations. The study suggests that different geographical regions require different treatment approaches to effectively combat the spread of the disease.
A massive research project has sequenced the bedbug genome, providing insight into its ability to resist insecticides. The study found that bedbug skin genetics play a crucial role in this resistance, and may also shed light on whether bedbugs originated from one or multiple sources.
A study published in the Journal of Medical Entomology found that the OFF! Clip-On repellent device is highly effective against hungry Aedes aegypti mosquitoes. The device causes high mosquito mortality and knockdown rates, making it a promising tool for preventing Zika bites.
The bed bug's genome has been sequenced, offering insights into its unique biology and potential targets for controlling its resurgence. The study found that bed bugs have evolved multiple ways to resist insecticides, including barriers and detoxification genes.
Millions of dollars have been spent on insecticides to kill bedbugs, but a new study shows that overuse has led to increased resistance. Researchers found that bedbugs in Michigan and Cincinnati were up to 33,333 times more resistant to certain chemicals than susceptible strains.
A new study reveals bed bugs have developed resistance to neonicotinoid insecticides, making pest control more challenging. The levels of detoxifying enzymes in the resistant bed bugs were higher than those in susceptible populations, indicating pre-existing resistance mechanisms may have contributed to this development.
Researchers found that bed bugs that fed after being treated with insecticides had significantly lower mortality rates than those that didn't. The study suggests that feeding stimulates detoxification enzymes, leading to increased resistance and survival.
The article discusses the biology and life cycle of squash bugs, which cause significant damage to crops. To control these pests, growers are adopting integrated pest management techniques, including cleaning up debris and boosting natural enemies.
Researchers found that foliar applications of kaolin at 2.5% and 5% controlled approximately 80% of the whitefly population in bean crops. Kaolin also improved plant physiology, reducing transpiration by 40% and increasing leaf chlorophyll content by 43%.
A team of researchers at Penn State has received a $10.2 million grant to study a new malaria-prevention method involving eave tubes with insecticide-laced netting. The approach aims to limit mosquito access to houses and reduce indoor mosquito densities by up to 90 percent.
A recent study found that global warming can reduce the effectiveness of permethrin in killing yellowfever mosquitoes. As temperatures increase, permethrin's efficacy decreases, highlighting the need for temperature consideration when choosing a pest-control product.
Research reveals that pesticide mixtures negatively affect snail and crustacean populations, even at sublethal levels, and populations exposed to low concentrations may be more sensitive to other environmental stressors
A comprehensive assessment of hop pests and their natural enemies has been published to help northeastern hop farmers manage insect pests. The study found that natural enemy populations can control economically damaging pests like twospotted spider mites and hop aphids without the need for insecticides.
Agricultural researchers propose using odors and nectars from wild plants to attract pest-eating predators, mimicking nature's defense against aphids and other insects. This approach could be achieved through breeding programs or artificial devices.
Research reveals that insecticide-treated bed nets function as human-baited insecticidal traps, delivering insecticide quickly to reduce mosquito activity. The study uses infrared video tracking technology to understand how mosquitoes interact with nets and inform future LLIN designs.
Researchers found that lice populations in 25 states have high levels of gene mutations linked to resistance to pyrethroids. The most resistant populations are from California, Texas, and Florida, where lice have all three genetic mutations associated with knockdown resistance.
A McGill University study found that insecticides can alter the behavior of individual spiders, including their ability to capture prey and explore new territories. The effects on male and female spiders were also distinct, with females being more affected in their ability to capture prey.
Researchers have identified new genetic markers for mosquito resistance to insecticides, which could improve its detection in the field. The study also found that mutations affecting detoxification enzymes can increase the biodegradation of insecticides in resistant mosquitoes.
Researchers found that sunlight can degrade neonicotinoids in water, but not always quickly enough to protect aquatic life and bees. In shallow depths of just 3 inches, certain insecticides persisted, increasing exposure risks for wildlife.
Research from Inserm found a significant association between increased urinary levels of pyrethroid metabolites and decreased verbal comprehension and working memory in six-year-old children. The study suggests potential neurotoxic effects of pyrethroids on child development.
Researchers found that H. azteca from polluted sites are less sensitive to pyrethroid insecticides than lab-grown ones. This suggests standard testing methods may not accurately reflect environmental health
Researchers found that plants like peppermint take up high concentrations of nicotine from cigarette smoke and contaminated soils. This discovery may explain the presence of high levels of nicotine in spices, herbal teas, and medicinal plants.
The use of neonicotinoid insecticides increased dramatically in the US, primarily driven by corn and soybean seeds treated with the pesticides. Researchers found that at least a third of all soybean acres and over 79% of all corn acres were planted with neonicotinoid-coated seed by 2011.
Researchers have identified a new class of dopamine receptor antagonists that selectively target mosquito cells, offering a safer alternative to current insecticides. These chemicals are structurally distinct and target different biochemical paths in mosquitoes, reducing the risk of human exposure.
A new field-based study from the University of Maryland reveals that realistic levels of imidacloprid exposure do not significantly harm honey bee colonies. However, higher doses and synergistic combinations with other stressors, such as climate change and malnutrition, can cause more severe consequences.
A global map produced by researchers at Helmholtz Centre for Environmental Research reveals that streams within 40% of the global land surface are at risk from insecticide runoff. The map highlights areas such as the Mediterranean, USA, Central America, and Southeast Asia as particularly vulnerable to water pollution.
A team of scientists has discovered potent natural compounds in plants that can counteract the action of juvenile hormone in insects, making them effective against mosquitoes and other pests. The newly identified compounds could lead to the development of a new class of safe and effective pesticides.
A study published in The Lancet found that using insecticide-treated bed nets alone is sufficient to protect children from malaria in areas with low or moderate transmission. Researchers led by Durham University concluded that combining wall sprays and bed nets does not offer additional protection against the disease.
A new study in The Lancet has found that combining insecticide spraying with bed nets offers no additional protection against malaria. In fact, the researchers suggest that investing more resources into providing bed nets may be a more effective solution to tackle malaria, as it is a low-cost and cost-effective method.
Researchers found that insecticides increase slug populations and reduce crop yields by poisoning insects that eat slugs. The neonicotinoids can have unintended costs, even within crop production.
The house fly genome contains an expanded number of immune response and defense genes, as well as numerous cytochrome P450s for detoxification. These findings could lead to novel control methods against house flies, a primary vector for human diseases.
Two non-synthetic bed bug pesticides, EcoRaider and Bed Bug Patrol, showed promise in laboratory tests, killing over 90% of bed bugs. However, their effectiveness is likely to be much lower in real-world settings due to the difficulty of applying insecticides directly on hidden bed bugs.
The study found that fipronil and imidacloprid inhibit mitochondrial bioenergetics in honeybees, leading to depleted cell energy and impaired flight muscles. This effect can contribute to the inability of bees to forage and return to their hives.
A USGS study reveals neonicotinoid insecticides are commonly found in streams throughout the Midwest, with clothianidin detected in 75% of sites. The chemicals persist in water and groundwater bodies, posing risks to aquatic organisms.