Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 21 for “"thiamethoxam"”.
-
Assessing Potential Solutions to Mitigate Pollution from Neonicotinoid Seed Coatings
Thiamethoxam and clothianidin are two neonicotinoids used in seed coatings for crops such as corn and soybeans. Both neonicotinoids have high solubility in water, so they are prone to transport via leaching and runoff. This thesis is comprised of two studies that evaluated potential solutions to …
-
Development and Evaluation of Integrated Approaches for Managing of Mexican Bean Beetle, Epilachna varivestis Mulsant
… objective, the effects of snap beans grown from thiamethoxam (a neonicotinoid insecticide)-treated seeds on Mexican bean beetle were assessed in greenhouse and field experiments. Thiamethoxam-treated plants killed 40 to 50% of Mexican bean beetle adults and larvae up to 16 days after planting. In …
-
Assessing the Effects of Chronic Neonicotinoid Insecticide Exposure on Aquatic Insects using Multiple Experimental Approaches
… the effects of imidacloprid, clothianidin, thiamethoxam on the model aquatic insect, Chironomus dilutus. Reduced emergence success, advanced emergence timing, and male-biased sex ratios were observed across all compounds tested. Imidacloprid and clothianidin reduced emergence success at …
-
Reproduction and development of the black vine weevil (Coleoptera: Curculionidae) in relation to environmental factors
… dosages of newer insecticides, imidacloprid and thiamethoxam, influence offspring production of O. sulcatus adults and its progeny under laboratory conditions. Weevils that survived short-term exposure to sublethal dosages of imidacloprid and thiamethoxam produce viable offspring when they have …
-
Analysis of Strobilurin Fungicides, Neonicotinoid Insecticides and Degradation Products in Atmospheric Particles
… imidacloprid, clothianidin, acetamiprid, and thiamethoxam. The highest detection frequency in 2016 was shown for imidacloprid (47%), while in 2018 acetamiprid had the highest detection frequency (67%). This is the first time that one of the neonicotinoid degradation products …
-
Bean Leaf Beetle: Impact of Leaf Feeding Injury on Snap Beans, Host Plant Choice and Role as a Vector of Bean Pod Mottle Virus in Virginia
… Trifolium repens. Insecticidal seed treatment of thiamethoxam on soybean seeds was evaluated to test the efficacy. Leaf area eaten and beetle mortality was measured. The thiamethoxam seed treatment protected soybean seedlings from beetle feeding through the V2 stage of growth.
-
Susceptibility of Oriental fruit moth, (Grapholita molesta (Busck)) to selected insecticides and mixtures
… spinetoram, spinosad, acetamiprid, thiamethoxam, esfenvalerate, and lambda-cyhalothrin, neonates were placed on wheat germ diet containing a range of concentrations of each insecticide. Overall, the two colonies responded similarly to these insecticides, regardless of parental food …
-
Stink bug egg studies in southeastern Virginia: parasitoid survey, and susceptibility and chorion permeability to insecticides
… of acephate, lambda-cyhalothrin, spinosad, and thiamethoxam, were carried out to determine efficacy against nonparasitized E. servus and A. hilare eggs, and T. podisi embryos developing in E. servus eggs. Results showed that eggs of both species were susceptible to insecticides, that there was …
-
Long-term effects of insecticides on environmental health: How does exposure of a female egg-laying insect to an insecticide affect subsequent generations?
… and neonicotinoid (thiacloprid, imidacloprid, thiamethoxam) they were topically exposed to, and that sublethal doses may take time to have an effect. Furthermore, males appeared to be more sensitive, with reduced lifespans, which could affect those species that display protandry. We found that …
-
Biology and Management of Brown marmorated Stink Bug, Halyomorpha halys (Stål), in Agricultural and Urban Environments
… + imidacloprid, lambda-cyhalothrin + thiamethoxam, and dinotefuran, which had some measureable activity even after 40 DAT. Each of these insecticides contained a pyrethroid alone or in combination with a neonicotinoid. Laboratory bioassays were conducted to determine the LC50 values of …
-
Evaluating Agricultural Best Management Practices to Mitigate Neonicotinoid Transport in Water and Soil
… plant types on movement of the neonicotinoid thiamethoxam (TMX) and its metabolite clothianidin (CLO) in treated agricultural fields. Due to dry weather and other complications, runoff and leachate data could not be statistically analyzed. Soil samples indicated that cover crops had no effect …
-
Integrated Multiple-tactic Management of the Redbanded Stink Bug on Soybeans in Louisiana
… from these plants. Insecticide application of thiamethoxam provided some control of stink bugs, although it did not impact yield. The combination of cultivar and insecticide application did not have a significant effect on natural enemies of stink bugs. Lastly, a study was also performed to …
-
Investigating host plant selection of harlequin bug, Murgantia histrionica (Hahn), in order to improve a trap cropping system for its management
… the neonicotinoid insecticides imidacloprid, thiamethoxam, dinotefuran, and clothianidin were toxic to HB nymphs; LC50 = 0.57, 0.52, 0.39, and 0.39 mg ai/liter, respectively. Field experiments were conducted to evaluate the efficacy of these insecticides over time when applied as a one-time …
-
Illuminating controls on solute and water transport in the critical zone
… distribution of the neonicotinoid insecticide thiamethoxam (TMX) by growing TMX-coated corn seeds in coarse vs fine-textured soil columns maintained with versus without growing corn plants. Fine-textured soil transported TMX at concentrations that were two orders of magnitude higher than …
-
Species survey, monitoring and management of economically important stink bug species in eastern Virginia
… were more toxic to A. hilare, while thiamethoxam and acetamiprid were more toxic to E. servus. In soybean field efficacy trials, dinotefuran performed comparably to the organophosphates and pyrethroids. Laboratory bioassays with organic insecticides resulted in moderate to high levels …
-
NEONICOTINOID TOXICITY IN REPRODUCTIVE HONEY BEE CASTES
… queen bees. Next, we investigated the effect of thiamethoxam (THI), a commonly used neonicotinoid, on developing queens. We found that direct THI toxicity in queens can result in hypoplasia of the pheromone producing mandibular glands. Such morphologic organ changes precede compromised organ …
-
Removal of organic compounds from aquatic environments by advanced oxidation processes.
… clothianidin, imidacloprid, thiacloprid, thiamethoxam, diuron, atrazine, dimethoate and 2,4-dichlorophenoxyacetic acid). The photocatalytic system was able to successfully remove a range of pesticides at the same time. Finally, a photocatalytic reactor prototype based on g-C3N4 coated …
-
Spatiotemporal Patterns of Distribution and Drivers of Neonicotinoid Insecticide Fate in Canadian Prairie Pothole Wetlands
… an outdoor microcosm experiment to evaluate thiamethoxam uptake from water by Typha latifolia and Alisma triviale using two concentrations over a 7-day period. Experimental results found some trace positive detections but no quantifiable accumulation of the insecticide in plant tissues. This …
-
Managing bacterial wilt, caused by Erwinia tracheiphila, on muskmelon with early control of striped cucumber beetle ( Acalymma vittatum (F)), and through varietal selection
… seed treatment or soil drenches with insecticide thiamethoxam significantly reduces the beetle numbers and wilt and increases the number of marketable fruits yield compared to not controlling striped cucumber beetle. However, the length of time row covers were left on the plants (for 7, 14, or 21 …
-
Early Season Population Dynamics and Residual Insecticide Effects on Bird Cherry-oat Aphid, Rhopalosiphum padi in Arkansas Winter Wheat
<p>Bird cherry-oat aphid is a common pest of Arkansas winter wheat. This aphid vectors barley yellow dwarf virus which may cause extensive crop damage and yield loss when wheat is infested by virulent aphids in the fall. Some suggest this damage may be avoided using insecticide seed treatments if …
Page 1 of 2