REX E. LUTTRELL, M.D.

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Researchers studied two strains of a fungus, Beauveria bassiana, to see how effective they are at controlling tarnished plant bugs, which harm cotton plants. They found that the Mississippi Delta native strain (NI8), when combined with a common emulsifier, killed over 50% of the bugs within ten days and resulted in better cotton fruit retention compared to other treatments. This matters because it can help protect cotton crops from significant damage, leading to better yields for farmers. Who this helps: Farmers growing cotton.

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This study looked at the effects of a pesticide called acephate on honey bees, particularly focusing on how it impacts their survival and certain enzyme activities that help detoxify harmful substances. The researchers found that while low levels of acephate didn’t directly kill the bees, it significantly reduced the activity of important detoxifying enzymes and caused weight loss. Specifically, acephate at a lethal dose killed 50% of bees and inhibited various enzyme activities by up to 79.9% in those that survived. Who this helps: This research benefits beekeepers and environmentalists concerned about bee health and agricultural practices.

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This study looked at how the commonly used insecticide imidacloprid affects honey bees, both on its own and in combination with seven other pesticides. The researchers found that mixing imidacloprid with certain pesticides, such as Domark and Transform, significantly increased bee mortality by up to 26%. Additionally, when all eight pesticides were combined, they caused total death in the bees, highlighting the heightened risk of using multiple pesticides together. Who this helps: This information is vital for farmers and agricultural professionals to make safer pesticide choices that protect honey bee populations.

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This study looked at how the insecticide imidacloprid and its combinations with other pesticides affect honey bees. The researchers found that bees fed with imidacloprid at a certain high level experienced a 36% death rate and a 56% reduction in feeding after two weeks. However, when mixed with other pesticides, the overall mortality increased to 53%, but no stronger toxic effects were seen from the mixtures. This research is important because it shows that while high levels of imidacloprid can harm bees, other pesticides at residue levels might not have the same impact, suggesting that managing pesticide use could protect bee populations. Who this helps: This helps beekeepers and agricultural workers focused on bee health and pesticide management.

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This study explored the genes in the saliva of the tarnished plant bug, an insect that feeds on plants. Researchers identified 666 unique genes that help the bug digest food and overcome plant defenses, including many enzymes that break down cell walls and make nutrients accessible. Understanding these genes can lead to new methods to protect crops from damage caused by this pest. Who this helps: Farmers and agricultural scientists.

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This study looked at how effective different strains of a fungus called Beauveria bassiana are at killing kudzu bugs, which are harmful pests for crops. The researchers found that two strains, NI8 and KUDSC, were particularly effective at low doses, with as few as 1.98 to 4.98 spores per square millimeter needed to kill many of the young bugs within two days. This is important because finding effective and low-toxicity pest control methods can help protect crops from these pests without harming the environment. Who this helps: This helps farmers and agricultural workers by providing an effective way to manage kudzu bug infestations.

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This study focused on understanding how tarnished plant bugs (TPB) become resistant to the pesticide imidacloprid. Researchers examined 6,688 genes and found significant changes in gene expression: 955 genes were more active while 1,277 were less active in resistant bugs. Notably, genes related to detoxifying chemicals, like P450 and esterase, were greatly increased, indicating that these bugs can better handle the pesticide, which is critical for managing pest resistance. Who this helps: This information benefits farmers and agricultural professionals trying to control pest populations effectively.

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The study looked at a strain of fall armyworm collected in Puerto Rico to see how resistant it had become to Bt toxins (found in genetically modified crops) and traditional chemical insecticides. Researchers found that this strain was 7,717 times more resistant to Cry1F (a type of Bt toxin) and 19 times more resistant to acephate, a common insecticide. This matters because as these pests become resistant, it makes it harder for farmers to protect their crops, which can lead to reduced yields and economic loss. Who this helps: This benefits farmers and agricultural industries that rely on effective pest control.

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The study looked at 42 commonly used pesticides on crops to see how toxic they are to honey bees. It found that while some pesticides, like a herbicide and a miticide, killed less than 1% of bees, 26 of the insecticides were extremely harmful, killing more than 99% of the bees tested. This research matters because it helps farmers choose safer pesticides that won't harm bees, which are crucial for pollination. Who this helps: This benefits farmers and beekeepers who rely on healthy bee populations for crop production.

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The study looked at two different diets made from chicken egg yolk to see which one helped the southern green stink bug grow better. The bugs that ate the fresh yolk diet had a survival rate of 97.3%, while those on the dry yolk diet survived only 74.67%. Overall, the fresh yolk diet resulted in healthier bugs, with shorter development time and longer lifespans, though the dry yolk diet produced more fertile eggs. Who this helps: This benefits researchers and farmers looking to breed these bugs for pest control or ecological studies.

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This study tested a new type of artificial diet to see how well the fungus Beauveria bassiana and the pesticide novaluron could control tarnished plant bugs, which are harmful to crops. The results showed that larger adult bugs were more easily infected by the fungus, while younger bugs had higher death rates when exposed to novaluron. This information is important because it helps researchers find better ways to manage tarnished plant bugs using biological controls and pesticides. Who this helps: This helps farmers and agricultural experts looking for effective pest management solutions.

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This study looked at two types of sugarcane borer larvae: one that is susceptible to the Cry1Ab pesticide and one that is resistant. Researchers found that even though there were some minor differences in the genes responsible for producing certain digestive enzymes (trypsins and chymotrypsins) between the two types of larvae, these differences did not significantly affect how the larvae developed resistance to the pesticide. This finding is important because it helps scientists understand that other factors, besides these specific enzymes, might be responsible for the resistance, guiding future research efforts. Who this helps: Farmers and agricultural scientists working to manage pest resistance.

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Researchers studied the differences in gene activity between two groups of sugarcane borers: one that is resistant to a common pesticide (Cry1Ab) and one that is not. They found that the resistant borers were about 100 times more tolerant to the pesticide, and their gene analysis revealed 384 genes with significant differences in activity. Many of these genes, particularly those involved in metabolism, were more active in the resistant strain, indicating changes that might help them survive pesticide treatments. Who this helps: This research benefits farmers who need effective pest control and scientists working on sustainable pest management solutions.

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Researchers studied the tarnished plant bug, which has become resistant to the pesticide acephate. They found that a population of these bugs had their resistance increase dramatically by 5.9 times and showed changes in gene activity that helped them break down the pesticide more effectively, particularly involving certain enzymes called esterases. This research highlights the complexity of pesticide resistance and the potential trade-offs insects face in their reproductive and digestive abilities, which could have important implications for pest control strategies. Who this helps: This helps farmers and agricultural professionals who need effective pest control methods.

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This study looked at a common pest, the sugarcane borer, to understand how it develops resistance to a type of insecticide found in genetically modified corn. Researchers found that when the borer has lower levels of a gene called cadherin (specifically, DsCAD1), it becomes more resistant to the insecticide Cry1Ab. They noticed that the resistant borers had significantly less DsCAD1 activity compared to the susceptible ones, leading to a reduced response to the insecticide. Who this helps: This benefits farmers and agricultural scientists working to protect crops from pests.

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This study examined six types of purple non-sulfur bacteria that naturally resist the herbicide atrazine. The researchers found that these bacteria were 1.5 to 4 times more resistant to atrazine than related strains, which might help us understand how some bacteria survive in environments treated with this herbicide. This could lead to better ways to manage agricultural chemicals and improve soil health. Who this helps: This helps farmers and environmental scientists looking to manage herbicide resistance and protect the ecosystem.