Publications by authors named "Pittarate Sarayut"

Aedes albopictus, known as the Asian tiger mosquito, is a significant vector for dengue fever, chikungunya, zika virus, yellow fever. Current control methods rely on chemical insecticides, which face challenges such as resistance, environmental harm, and impact on non-target species Eudrilus eugeniae and Artemia salina. This study evaluates the toxic effects of biogenic copper nanoparticles (CuNPs) synthesized using Metarhizium robertsii intracellular extract obtained from our previous research.

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  • The review focuses on the classification, biology, and management of Drosophilidae fly species, which are significant pests in fruit agriculture.
  • It analyzes their life cycle, behavior, and interaction with ecological factors, emphasizing their rapid reproduction and adaptability as management challenges.
  • The potential of entomopathogenic fungi (EPF) as an eco-friendly biocontrol method is explored, covering their mode of action, effectiveness factors, and offering insights for future research to improve EPF applications.
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, known as the South American tomato leaf miner, significantly impacts tomato plants () economically on a global scale. This pest, belonging to the Gelechiidae family, is native to South America and was first identified in Peru in 1917. Since its discovery, has rapidly spread to Europe, Africa, and Asia, severely threatening tomato production in these regions.

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This study examined the impact of Metarhizium anisopliae (Hypocreales: Clavicipitaceae) conidia on the eggs, larvae, pupae, and adults of Spodoptera frugiperda. The results showed that eggs, larvae, pupae, and adults exhibited mortality rates that were dependent on the dose. An increased amount of conidia (1.

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Pesticides play a pivotal role in agriculture for the effective production of various crops. The indiscriminate use of pesticides results in the significant bioaccumulation of pesticide residues in vegetables. This situation is beyond the control of consumers and poses a serious health issue for human beings.

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  • * A study showed that high concentrations of fungal conidia caused significant mortality in all larval stages of the fall armyworm, with the second instar suffering the highest mortality rate of 97% after nine days.
  • * Treated larvae exhibited physiological and behavioral changes, such as enzyme activity reduction and abnormal feeding behaviors, while showing minimal impact on non-target organisms like earthworms.
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Insect pests represent a major threat to human health and agricultural production. With a current over-dependence on chemical insecticides in the control of insect pests, leading to increased chemical resistance in target organisms, as well as side effects on nontarget organisms, the wider environment, and human health, finding alternative solutions is paramount. The employment of entomopathogenic fungi is one such potential avenue in the pursuit of greener, more target-specific methods of insect pest control.

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The present study aims to evaluate the different nanoparticles (Cu NPs, KI NPs, Ag NPs, Bd NPs, and Gv NPs) against 4th instar larvae as well as the microbial toxicity, phytotoxicity, and soil pH. Nanoparticles were tested at three concentrations (1000, 10000, and 100000 ppm) using two methods (food dip and larvae dip) against larvae. Results (from the larval dip method) showed that among the nanoparticles, the KI NPs caused 63%, 98%, and 98% mortality within 5 days in the treatment of 1000, 10000, and 100000 ppm, respectively.

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In the present study seed derived essential oils were tested against , , , and , as well as their effects on non-target species and at 24 h post treatment. The seed essential oil produced insecticidal activity against (LC = 41.679, LC = 75.

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  • Entomopathogenic fungi are being studied as a solution to insecticide resistance in pests, emphasizing their efficacy and safety for non-target species.
  • The study involves isolating fungi from Palamalai Hills, India, and testing their potency against insect larvae, with results indicating significant pest mortality at higher conidia concentrations.
  • Enzymatic analysis post-treatment reveals significant changes in insect enzyme levels, while no adverse effects were found on earthworms, suggesting a promising application for these fungi in pest management.
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This study aimed to synthesize and evaluate the efficacy of CuO NPs (copper oxide nanoparticles) with varying test concentrations (10−500 ppm) against larvicidal, antifeedant, immunological, and enzymatic activities against larvae of S. frugiperda at 24 h of treatment. Copper nanoparticles were characterized by using a scanning electron microscope (SEM) and energy dispersive X-ray (EDaX) analysis.

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  • Insect pests like Spodoptera litura develop immunity to fungal infections through various immune responses, but the exact biochemical processes involved are unclear.
  • Our research shows that after exposure to the fungus Metarhizium flavoviride, antioxidant enzyme levels in S. litura change significantly, with a decrease in certain immune markers and an increase in detoxifying enzymes.
  • M. flavoviride is harmful to S. litura larvae and may serve as an effective, environmentally friendly alternative for controlling this pest compared to synthetic pesticides.
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is a fungal pathogen, which causes chalkbrood disease in bees and is threatening beekeeping worldwide. The demand for organic honey for export has lately heightened hence the biological control is the option. This study aimed at the in vitro evaluation of the potency of plant extracts against chalkbrood disease for the possibility of being employed as a biological control strategy.

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Fall armyworm, , entered Thailand in late 2018 and has now spread in several regions, with devastating effects in maize and rice production, which are some of the most important cereals in the world. Since then, farmers have utilized the available chemical insecticides to try to control it, but their efforts have been futile. Instead, they have ended up using extraordinary dosages, hence threatening non-target species and other fauna and flora, as well as being costly.

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  • Fall armyworm is a major pest for crops, and traditional pest control methods often rely on synthetic or biological insecticides.
  • This study investigates the effectiveness of Zinc Oxide (ZnO) nanoparticles as a new pest management method, showing that they significantly disrupt the life cycle of the larvae when applied at various concentrations.
  • The findings suggest that ZnO nanoparticles can not only control fall armyworm populations but also cause malformations and reduce reproductive success, making them a promising tool for integrated pest management strategies.
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Currently, medical and stored grain pests are major concerns of public health and economies worldwide. The synthetic pesticides cause several side effects to human and non-target organisms. Copper nanoparticles (CuNPs) were synthesized from an aqueous extract of and screened for insecticidal activity against , , , and other non-target organisms such as , and .

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is an ectoparasitic flea species commonly found on dogs and cats. The current study verified the virulence of conidia of the entomopathogenic fungus produced under different color LED light (red, blue, purple, green, yellow, and white) to adults of . The fungal isolates were cultivated on malt extract agar (MEA).

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