Articles tagged with Insecticide Resistance
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A recent study on bedbugs has identified potential genes associated with pesticide resistance, shedding light on the mechanisms behind their increasing resilience to insecticides. The research may lead to the development of novel control methods that are more effective against these troublesome insects.
Researchers at the University of Arizona have developed a novel approach to controlling pink bollworm pests in cotton fields. By combining pest-resistant cotton with the controlled release of sterile moths, they have virtually eliminated the pest from Arizona, allowing growers to maintain high yields without spraying insecticides.
Researchers at Liverpool School of Tropical Medicine develop a new technique to detect and monitor insecticide resistance in Anopheles funestus mosquitoes. The technique involves forcing female mosquitoes to lay eggs, which are then reared into adult mosquitoes to study levels of resistance to pyrethroid/DDT insecticides.
A new trade name, Sparta – the Soybean Aphid Shield, has been developed by Dechun Wang, which promises healthier harvests for growers and a little green for the university too. The resistant genes were isolated from 2,000 strains of soybeans tested against aphids.
Researchers have identified a key component of the female pear psylla's pheromone, which could be used to lure males onto sticky traps or disrupt their mating. This compound, 13 methyl heptacosane, may reduce reliance on insecticides and help mitigate resistance.
Researchers at University of Illinois have identified a new soybean aphid biotype that can overcome resistance genes in currently available varieties. This discovery highlights the need for breeders and seed companies to keep pace with evolving pest populations.
Scientists at Sainsbury Laboratory have discovered a new way to produce crops with broad-spectrum disease resistance using pattern recognition receptors. This breakthrough could lead to enhanced resistance in various crops, reducing yield losses and pesticide use.
A new oral treatment has been shown to be effective in 95% of cases against head lice, providing a real therapeutic alternative to conventional anti-lice lotions. The study used oral Ivermectin administered at 400 μg per kilogram and found significant improvements compared to traditional malathion lotion treatments.
A new non-neurotoxic treatment for head lice has been found to be safe and effective in children from six months of age and up, with an average treatment success rate of 91.2% after one week. The treatment, benzyl alcohol lotion 5% (Ulesfia), works by suffocating lice, a method previously attempted with household items.
A research team at Uppsala University discovered that point mutation can introduce new functions into an enzyme without major structural alterations. This finding may explain the emergence of resistance to toxins in various organisms, including insects, viruses, bacteria, and tumors.
A new study analyzes data from five continents to conclude that existing strategies can be used to predict, monitor and manage insect resistance. By understanding what accelerates and delays resistance, farmers can more effectively thwart pest resistance using tactics like refuge strategy and pyramided crops.
The Entomological Society of America announced the Editor's Choice Awards for 2008, recognizing outstanding articles in various journals. The awards honored authors who made significant contributions to entomology, including research on termite invasions, gypsy moth distribution, and insect-vector relationships.
A new and emerging disease, Watermelon Vine Decline (WVD), has caused devastating economic losses for watermelon producers in Florida. The disease, caused by the whitefly-transmitted squash vein yellowing virus (SqVYV), can lead to rapid vine collapse and marketable fruit loss.
Researchers at the University of Illinois have developed a new soybean variety resistant to aphids, but also discovered a new type of aphid that can overcome this resistance. The PI 200538 gene provides additional protection against the new biotype of soybean aphid, offering hope for more durable resistance.
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.
A £1.1m grant will lead the development of a Field Applicable Screening Tool (FAST) kit to detect insecticide resistance in mosquitoes, crucial for effective malaria control in sub-Saharan Africa. The project aims to identify genes that render mosquitoes resistant to key insecticides.
Researchers at Virginia Tech have received a $3.557 million grant from NIAID to develop vector-specific, resistance-breaking insecticides that could render traditional ITNs ineffective. The new compounds are designed to be safer for humans while maintaining significant insecticidal activity against malaria mosquitoes.
Late-acting insecticides targeting older mosquitoes show potential to reduce malaria transmission by 95% and slow down resistance. The approach could lead to evolution-proof insecticides that never become obsolete.
Researchers have discovered a new approach to controlling malaria by killing only older mosquitoes, reducing the selection for resistant insects. This method could lead to evolution-proof insecticides that never become obsolete, saving millions of dollars in development costs.
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.
Researchers at CSIRO Australia have discovered a key to overcoming three major cereal diseases, providing long-lasting protection against multiple pathogens. The Lr34 gene sequence offers broad-spectrum control of leaf rust, stripe rust, and powdery mildew, with tests showing constant protection for over 80 years.
Researchers at Liverpool School of Tropical Medicine have identified two genes associated with resistance to pyrethroid insecticides in Anopheles funestus and Anopheles gambiae mosquitoes. This discovery provides early warning for future control problems due to insecticide resistance.
Researchers have identified specific mosquito genes associated with resistance to a common class of insecticide, a significant step toward effective malaria control strategies. Two cytochrome P450 genes in Anopheles funestus mosquitoes are linked to pyrethroid resistance.
The worm Caenhorabditis elegans becomes resistant to pesticide Levamisole in 20 generations, adapting its population in just 80 days. This resistance allows the worms to survive and reproduce despite the pesticide's effects on mobility and fertility.
A new study published in PLoS Medicine finds that artemisinin combination therapy (ACT) can reduce malaria transmission in low-transmission areas, comparable to the use of insecticide-treated bed nets. Longer-acting anti-malarial regimens may also be effective in reducing transmission in high-transmission areas.
Researchers have developed a way to produce an antimalarial compound cheaply, which could make treating malaria less expensive. This process could also lead to the discovery of new antibiotics as bacteria are harnessed to produce compounds with antibiotic properties.
Research found that Culex quinquefasciatus mosquitoes harbouring both ace-1R and KdrR genes have lower survival costs than those carrying only one gene, suggesting a possible advantage for multiply resistant organisms in pest management strategies.
A bollworm species has evolved resistance to biotech cotton's Bt toxin in the US, contradicting predictions of rapid pest resistance. The findings confirm the effectiveness of refuge strategies to delay resistance evolution.
Researchers have developed new designer toxins that can kill Bt-resistant insect pests, including the pink bollworm, a major cotton pest. The toxins work by modifying the way the insects' gut membranes respond to Bt toxins, rendering them ineffective.
A new study has discovered that a single gene in the codling moth can make it 100,000 times less susceptible to a granulovirus, used as an environmentally friendly means of biological crop protection. The virus resistance is inherited on the Z chromosome and can spread quickly through populations.
University of Illinois researchers warn that higher corn prices are causing some farmers to ignore integrated pest management (IPM) strategies, which could undermine the effectiveness of technologies that sustain them. IPM is a set of principles developed to minimize ecological impacts of pesticides and transgenic crops.
Researchers developed a non-pyrethroid-DEET combination that shows strong synergy in lethal and paralyzing effects on mosquitoes, inhibiting blood feeding. The treatment's residual efficacy is several months longer than either agent applied alone.
Researchers have identified ten areas of the wild tomato genome associated with resistance to grey mould. The discovery could lead to the development of new, pesticide-free tomato varieties.
A team of scientists from the University of Arizona found no net increase in resistance to Bt crops, with a decrease in resistance reported instead. This is contrary to experts' predictions when these crops were first commercialized. The use of refuges has driven pesticide use to historic low levels, saving growers $80 per acre.
Researchers have developed a product that blocks insect enzymes and delivers a dose of pesticide 4-5 hours later, proving almost 100% effective in trials. This technology reduces the amount of pesticide needed on fields, benefiting both Western and developing world farmers.
Research by University of Bath scientists shows that DDT resistance confers an advantage when inherited through females, leading to its global spread. This discovery challenges the common assumption that genetic resistance always carries a fitness cost.
Researchers found DDT-resistant fruit flies confer a two-fold advantage when inheriting the resistance gene, allowing them to thrive even without pesticide use. This discovery has implications for antibiotic resistance in bacteria, suggesting measures may not halt its spread.
Researchers have discovered the molecular structure of a glycolipid receptor to which Bt toxin binds, potentially leading to more effective pesticides and new treatments for parasitic infections. The study's findings could also help prevent insect resistance to Bt toxins.
A study in the Royal Society journal explores genetic factors in social responsibility, finding that genes play a significant role in shaping attitudes. The research also examines the potential for Argentine ants to spread globally due to climate change, highlighting the importance of preventive measures.
Researchers are studying the genetic mutations that make mosquitoes resistant to pyrethroid pesticides, a key strategy for controlling diseases like St. Louis encephalitis and West Nile encephalitis in Texas urban areas. The study aims to develop new methods of mosquito control to prevent resistance.
Researchers found that using plants with moderately effective genetic modifications in a buffer zone around main crops can play a major role in insect control. This approach delays the development of resistant insects by creating negative cross-resistance, effectively eliminating them from invading the main crop.
A new technique targeting pesticide-resistant insects has shown effectiveness in trials against the cotton bollworm, silverleaf whitefly, and diamondback moth. The method uses micro-encapsulated formulations to deliver an enzyme inhibitor and a pesticide, providing a double-blow effect.
Research reveals that mosquitoes like Aedes aegypti are less likely to develop high levels of insecticide resistance due to a silent genetic mutation. The study found that only one base mutation is needed for some mosquito species, like Anopheles gambiae, but two adjacent mutations are required in others, including Aedes aegypti.
Researchers found that biotech corn carrying a gene for insect protection can pollinate non-Bt corn plants up to 100 feet away, posing a risk of contaminating refuge areas. The discovery suggests measures are needed to reduce pollen spread from Bt corn to corn fields requiring refuge zones.
A Purdue University research team has found a set of genes that may orchestrate insects' ability to fight the effects of pesticides. The study identified dozens of genes different in resistant fly lines compared to non-resistant wild-type flies, indicating that multiple genes are involved in metabolic resistance.
Researchers at Purdue University have identified a method to identify chemical compounds that can be added to pesticides to overcome insect resistance. The approach, which was tested on fruit flies, shows promise for increasing the effectiveness of current pesticides and reducing the need for new ones.
A team of scientists will sequence a large DNA segment in soybeans and its wild relatives to identify genes for disease resistance. This step is crucial for isolating and transferring these genes to crops with enhanced disease resistance, an alternative to pesticide use.
Researchers have discovered a single gene mutation in flies that provides resistance to multiple, chemically unrelated pesticides. This mutation has spread globally and has been linked to devastating consequences if not addressed through reassessment of current pest management methods.
Researchers at University of Melbourne warn of potential risks in pesticide control due to widespread resistance discovered in Drosophila melanogaster fly species. The gene Cyp6g1 confers resistance by producing more protein that breaks down pesticides, posing significant challenges for future pest management options.
Scientists at the University of Massachusetts have developed a way to grow colonies of mutated head lice in a laboratory setting. This allows them to examine the biochemical and molecular mechanisms of resistance and monitor the frequency of mutations that cause resistance.
Researchers Kun Yan Zhu and Jian-Rong Gao found that greenbugs with resistance develop a higher rate of the acetylcholinesterase enzyme, requiring more insecticide to kill. This breakthrough may lead to better pest control methods by monitoring resistance in individual fields.
Genetic modified organism (GMO) crops can benefit from a 'refugia strategy' that preserves susceptible insect genes. This approach aims to counteract potential insect resistance by allowing certain pests to survive and breed in GMO-free areas.
Researchers at Purdue University developed a method to use pesticides in a precise way to stop genetic resistance from arising. Using multiple pesticides together can delay resistance for decades, potentially reducing costs and social impacts.
A Clemson-led team led by Linda J. Gahan has made a breakthrough in tracking genetically the tobacco budworm's efforts to become resistant to biotechnological pest controls. The discovery opens the door for monitoring resistance mechanisms and management strategies in insect pests.
Scientists have discovered the genetic and molecular means by which roundworms develop resistance to Bt toxins, which are safe to humans but threaten long-term effectiveness. The researchers identified a galactosyltransferase enzyme as key to toxin recognition, enabling the development of strategies to delay or circumvent resistance.
Researchers have identified a gene that confers high levels of resistance in the tobacco budworm moth to genetically engineered crops with built-in insecticides. This discovery will enable farmers and government officials to take early steps to prevent uncontrollable outbreaks by detecting the early signs of pests evolving resistance.
Researchers found that field refuges made of non-Bt plants can prevent insects from developing resistance to Bt-engineered crops. The study demonstrated the importance of carefully managing insects within these refuges to ensure their effectiveness.
Researchers at Kansas State University conducted a genetic study on corn borer resistance to Bt toxins, finding that the European corn borer's resistance appears to be inherited as an incompletely dominant trait. The team emphasizes the importance of developing effective resistance management plans to mitigate potential losses.