1,404 results match your criteria plutella xylostella

Preparation of p-amino salicylic acid-modified polysuccinimide as water-based nanocarriers for enhancing pesticide stability and insecticidal activity.

Colloids Surf B Biointerfaces 2021 Jul 19;207:111990. Epub 2021 Jul 19.

Innovative Institute for Plant Health, Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, People's Republic of China. Electronic address:

Avermectin (AVM) is a biopesticide with low toxicity and high activity, but has limited use due to its poor water solubility and easy decomposition. A delivery system that can stabilize this biopesticide can play a significant role for improving its biological activity. Herein, water-dispersible functionalized polysuccinimide nanoparticles (PAD) were prepared by a ring-opening reaction and subsequently used to encapsulate AVM via self-assembly to form [email protected] nanoparticles with a loading ratio of 10. Read More

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Fitness comparison of on original and marginal hosts using age-stage, two-sex life tables.

Ecol Evol 2021 Jul 23;11(14):9765-9775. Epub 2021 Jun 23.

State Key Laboratory for Ecological Pest Control of Fujian and Taiwan Crops Institute of Applied Ecology Fujian Agriculture and Forestry University Fuzhou China.

The diamondback moth, , is an important agricultural pest that severely damages cruciferous vegetables. Although previously considered a threat only to species, has been observed to feed on noncruciferous vegetables. Here, we established a population of on the pea (PxP population). Read More

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Construction of Cholesterol Oxime Ether Derivatives Containing Isoxazoline/Isoxazole Fragments and Their Agricultural Bioactive Properties/Control Efficiency.

J Agric Food Chem 2021 Jul 19. Epub 2021 Jul 19.

College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China.

To explore natural-product-based pesticidal candidates and high value-added application of cholesterol in agriculture, oximinoether derivatives of cholesterol-containing isoxazoline/isoxazole fragments ( and ) were semiprepared by structural optimization of cholesterol. Their structures were characterized by optical rotation, high-resolution mass spectrometry (HRMS), IR, and H NMR spectroscopy. Particularly, the configurations of oxime fragments at the C-7 position of target compounds were undoubtedly determined by X-ray crystallography. Read More

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Plant Polysaccharide Modulate Biofilm Formation and Insecticidal Activities of Strains.

Front Microbiol 2021 28;12:676146. Epub 2021 Jun 28.

State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Laboratory of Biopesticide and Chemical Biology of Ministry of Education & Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, College of Life Sciences & College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China.

After the biological pesticide (Bt) is applied to the field, it has to remain on the surface of plants to have the insecticidal activities against insect pests. Bt can form biofilms on the surface of vegetable leaves, which were rich in polysaccharides. However, the relationship between polysaccharides of the leaves and the biofilm formation as well as the insecticidal activities of Bt is still unknown. Read More

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A haploid diamondback moth (Plutella xylostella L.) genome assembly resolves 31 chromosomes and identifies a diamide resistance mutation.

Insect Biochem Mol Biol 2021 Jul 9:103622. Epub 2021 Jul 9.

Bio21 Institute, School of BioSciences, University of Melbourne, 3052, Australia. Electronic address:

The diamondback moth, Plutella xylostella (L.), is a highly mobile brassica crop pest with worldwide distribution and can rapidly evolve resistance to insecticides, including group 28 diamides. Reference genomes assembled using Illumina sequencing technology have provided valuable resources to advance our knowledge regarding the biology, origin and movement of diamondback moth, and more recently with its sister species, Plutella australiana. Read More

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Comparative Transcriptome Analysis Reveals Sex-Based Differences during the Development of the Adult Parasitic Wasp (Hymenoptera: Braconidae).

Genes (Basel) 2021 Jun 10;12(6). Epub 2021 Jun 10.

Institute of Insect Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.

The endoparasitic wasp is an important biological agent for controlling the population of , a major pest of cruciferous crops worldwide. Though the genome of has recently been reported, molecular mechanisms associated with sexual development have not been comprehensively studied. Here, we combined PacBio Iso-Seq and Illumina RNA-Seq to perform genome-wide profiling of pharate adult and adult development of male and female . Read More

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A -Acting Mutation in the Promoter Is Associated with Cry1Ac Resistance in (L.).

Int J Mol Sci 2021 Jun 5;22(11). Epub 2021 Jun 5.

Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.

The molecular mechanisms of insect resistance to Cry toxins generated from the bacterium (Bt) urgently need to be elucidated to enable the improvement and sustainability of Bt-based products. Although downregulation of the expression of midgut receptor genes is a pivotal mechanism of insect resistance to Bt Cry toxins, the underlying transcriptional regulation of these genes remains elusive. Herein, we unraveled the regulatory mechanism of the downregulation of the ABC transporter gene (also called ), a functional midgut receptor of the Bt Cry1Ac toxin in The promoters of Cry1Ac-susceptible and Cry1Ac-resistant strains were cloned and analyzed, and they showed clear differences in activity. Read More

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Spatio-temporal distribution patterns of Plutella xylostella (Lepidoptera: Plutellidae) in a fine-scale agricultural landscape based on geostatistical analysis.

Sci Rep 2021 Jun 30;11(1):13622. Epub 2021 Jun 30.

State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.

A detailed knowledge on the spatial distribution of pests is crucial for predicting population outbreaks or developing control strategies and sustainable management plans. The diamondback moth, Plutella xylostella, is one of the most destructive pests of cruciferous crops worldwide. Despite the abundant research on the species's ecology, little is known about the spatio-temporal pattern of P. Read More

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Exposure to (Z)-11-hexadecenal [(Z)-11-16:Ald] increases Brassica nigra susceptibility to subsequent herbivory.

Sci Rep 2021 Jun 29;11(1):13532. Epub 2021 Jun 29.

Department of Environmental and Biological Sciences, University of Eastern Finland, Yliopistonranta 1 E, N70211, Kuopio, Finland.

It is well established that plants emit, detect and respond to volatile organic compounds; however, knowledge on the ability of plants to detect and respond to volatiles emitted by non-plant organisms is limited. Recent studies indicated that plants detect insect-emitted volatiles that induce defence responses; however, the mechanisms underlying this detection and defence priming is unknown. Therefore, we explored if exposure to a main component of Plutella xylostella female sex pheromone namely (Z)-11-hexadecenal [(Z)-11-16:Ald] induced detectable early and late stage defence-related plant responses in Brassica nigra. Read More

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Toxicity of Methyl Benzoate and Analogs to Adult Aedes aegypti.

J Am Mosq Control Assoc 2021 Jun;37(2):83-86

Methyl benzoate is a natural product (floral volatile organic compound) that is currently used as a food flavoring ingredient. This compound has shown to be insecticidal in laboratory studies against agricultural and urban pests, including spotted wing drosophila Drosophila suzukii, brown marmorated stink bug Hyalomorpha halys, the diamondback moth Plutella xylostella, and the common bed bug Cimex lectularius, to name several insect taxa. In this study we topically treated adult Aedes aegypti females with methyl benzoate and analogs and determined their toxicities. Read More

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Varying contributions of three ryanodine receptor point mutations to diamide insecticide resistance in Plutella xylostella.

Pest Manag Sci 2021 Jun 27. Epub 2021 Jun 27.

Key Laboratory of Plant Immunity and College of Plant Protection, Nanjing Agricultural University, Nanjing, China.

Background: Although decoding the molecular mechanisms underlying insecticide resistance has often proven difficult, recent progress has revealed that specific mutations in the ryanodine receptor (RyR) of the diamondback moth, Plutella xylostella, can confer resistance to diamide insecticides. The extent to which specific RyR mutations contribute to the diamide resistance phenotype, the associated genetic traits and fitness costs remain limited.

Results: Three field-evolved PxRyR mutations (G4946E, I4790 M, and I4790 K) were respectively introgressed into a common susceptible background strain (IPP-S) of P. Read More

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RNA-seq analysis of gene expression changes in cuticles during the larval-pupal metamorphosis of Plutella xylostella.

Comp Biochem Physiol Part D Genomics Proteomics 2021 Jun 19;39:100869. Epub 2021 Jun 19.

College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China. Electronic address:

The diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae) is a holometabolous insect that its cuticles must undergo the significant changes during the larval-pupal metamorphosis development. To elucidate these changes at molecular levels, RNA-seq analysis of cuticles from LLS (later fourth instar larval stage), PPS (prepupal stage) and PS (pupal stage) were performed in P. xylostella. Read More

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A serpin (CvT-serpin15) of teratocytes contributes to microbial-resistance in Plutella xylostella during Cotesia vestalis parasitism.

Pest Manag Sci 2021 Jun 21. Epub 2021 Jun 21.

Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, 310058, Hangzhou, China.

Background: Parasitic wasps are important group of entomophagous insects for pest control. As parasitic wasps often lay eggs on or into their associated hosts, parasitoids evolve to utilize several factors including venom, polydnavirus (PDV) to alter host physiology for successful parasitism. Some taxa of endoparasitoids produce teratocytes, which are a type of cells that are released into host insects when wasp eggs hatch. Read More

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The glutathione S-transferase (PxGST2L) may contribute to the detoxification metabolism of chlorantraniliprole in Plutella xylostella(L.).

Ecotoxicology 2021 Aug 10;30(6):1007-1016. Epub 2021 Jun 10.

Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Guangzhou, P.R. China.

The diamondback moth (Plutella xylostella L.), is an economic pest of cruciferous plants worldwide, which causes great economic loss to cruciferous plants production. However, the pest has developed resistance to insecticides. Read More

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Docking-based generation of antibodies mimicking Cry1A/1B protein binding sites as potential insecticidal agents against diamondback moth (Plutella xylostella).

Pest Manag Sci 2021 Jun 6. Epub 2021 Jun 6.

Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, P. R. China.

Background: Broad use of insecticidal Cry proteins from Bacillus thuringiensis in biopesticides and transgenic crops has resulted in cases of practical field resistance, highlighting the need for novel approaches to insect control. Previously we described an anti-Cry1Ab idiotypic-antibody (B12-scFv) displaying toxicity against rice leafroller (Cnaphalocrocis medinalis) larvae, supporting the potential of antibodies for pest control. The goal of the present study was to generate insecticidal antibodies against diamondback moth (Plutella xylostella) larvae. Read More

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Insecticidal Activities Against and and Corresponding Constituents of Tung Meal from .

Insects 2021 May 10;12(5). Epub 2021 May 10.

CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.

The environmental pollution, pesticide resistance, and other associated problems caused by traditional chemical pesticides with limited modes of action make it urgent to seek alternative environmentally-friendly pesticides from natural products. Tung meal, the byproduct of the detoxified (Hemsl.) seed, has been commonly used as an agricultural fertilizer and as a pesticide. Read More

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Synthesis of Novel Pesticidal ,-Disubstituted Sulfamide Derivatives Using Sulfur(VI) Fluorine Exchange Click Reaction.

J Agric Food Chem 2021 Jun 24;69(21):5798-5803. Epub 2021 May 24.

State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, Guangdong 510642, China.

Sulfur(VI) fluorine exchange click reaction was applied to the highly efficient synthesis of new ,'-disubstituted sulfamide (RNH-SO-NHR) derivatives as pesticide candidates. Bioassays were conducted to evaluate both insecticidal and fungicidal activities of the target compounds. Preliminary results showed that the target molecules exhibited good bioactivities. Read More

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Molecular and pharmacological characterization of biogenic amine receptors from the diamondback moth, Plutella xylostella.

Pest Manag Sci 2021 May 18. Epub 2021 May 18.

State Key Laboratory of Ecological Pest Control for Fujian-Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.

Backgroud: Insect biogenic amines play important roles in mediating behavioral and physiological processes. They exert their effects by binding to biogenic amine receptors (BARs), which are specific receptor proteins in the G-protein-coupled receptor superfamily. BAR genes have been cloned and characterized from multiple model insects, including Drosophila melanogaster, Anopheles gambiae, Bombyx mori, Apis mellifera and Tribolium castaneum. Read More

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Within- and Trans-Generational Life History Responses to Diurnal Temperature Amplitudes of the Pupal Stage in the Diamondback Moth.

Environ Entomol 2021 May 11. Epub 2021 May 11.

Shanxi Key Laboratory of Integrated Pest Management in Agriculture, College of Plant Protection, Shanxi Agricultural University, Taiyuan 030031, China.

Diurnal temperature fluctuations in nature can have a significant effect on many ectodermic traits. However, studies on the effects of diurnal temperature fluctuations on organisms, especially the effects on specific life stages, are still limited. We examined the immediate effects of the same average temperature (25°C) and different temperature amplitudes (±4, ±6, ±8, ±10, ±12°C) on the development and survival of Plutella xylostella (Lepidoptera: Plutellidae). Read More

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Comparative study of the ditrophic interaction between .

3 Biotech 2021 May 18;11(5):223. Epub 2021 Apr 18.

Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, India.

In the present investigation, hyperparasitic interaction between TM (MH590235) and was studied through scanning electron microscopy and chromatographic techniques. Dose-mortality responses showed an increase in mortality of larva with an increase in spore concentration. The LC value for isolate TM (MH590235) was 2. Read More

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Anti-idiotypic single-chain variable fragment antibody partially mimic the functionally spatial structure of Cry2Aa toxin.

Anal Biochem 2021 Jul 28;625:114222. Epub 2021 Apr 28.

School of Life Sciences, Discipline of Microbiology, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban, 4000, South Africa. Electronic address:

The anti-idiotypic antibody is widely used in the field of immunology to simulate structural features or even induce the biological activity of antigens. In this study, we obtained seven anti-idiotypic single-chain variable fragments (scFv) antibodies of Cry2Aa toxin from a phage-displayed mutant library constructed using error-prone PCR technique. A mutant designated 2-12B showed the best binding ability amongst all anti-idiotypic scFv isolates to Plutella xylostella brush border membrane vesicles (BBMVs). Read More

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MAPK-Activated Transcription Factor PxJun Suppresses Expression and Confers Resistance to Cry1Ac Toxin in (L.).

Appl Environ Microbiol 2021 Jun 11;87(13):e0046621. Epub 2021 Jun 11.

Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China.

Deciphering the molecular mechanisms underlying insect resistance to Cry toxins produced by Bacillus thuringiensis (Bt) is pivotal for the sustainable utilization of Bt biopesticides and transgenic Bt crops. Previously, we identified that mitogen-activated protein kinase (MAPK)-mediated reduced expression of the gene is associated with Bt Cry1Ac resistance in the diamondback moth, Plutella xylostella (L.). Read More

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Molecular characterization and enzyme inhibition studies of NADP+- farnesol dehydrogenase from diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae).

Biosci Biotechnol Biochem 2021 Jun;85(7):1628-1638

Institute of Systems Biology (INBIOSIS), Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, Malaysia.

Juvenile hormone III (JH III) plays an important role in insect reproduction, development, and behavior. The second branch of JH III production includes oxidation of farnesol to farnesal by farnesol dehydrogenase. This study reported the identification and characterization of Plutella xylostella farnesol dehydrogenase (PxFoLDH). Read More

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Resistance and fitness costs in diamondback moths after selection using broflanilide, a novel meta-diamide insecticide.

Insect Sci 2021 Apr 16. Epub 2021 Apr 16.

Department of Entomology, China Agricultural University, Beijing, 100193, China.

The diamondback moth (DBM) Plutella xylostella (L.) (Lepidoptera: Plutellidae) is an insect pest found around the world that feeds on cruciferous crops. The DBM has become resistant to most insecticides in current use in the field. Read More

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Mutation of P-element somatic inhibitor induces male sterility in the diamondback moth, Plutella xylostella.

Pest Manag Sci 2021 Jul 5;77(7):3588-3596. Epub 2021 May 5.

CAS Key Laboratory of Insect Developmental and Evolutionary Biology, CAS Center for Excellence in Molecular Plant Sciences/Institute of Plant Physiology and Ecology, Shanghai, China.

Background: Genetic manipulation of sex determination pathways in insects provides the basis for a broad range of strategies to benefit agricultural security and human health. The P-element somatic inhibitor (PSI) protein, an exon splicing silencer that promotes male-specific splicing of dsx, plays a critical role in male sexual differentiation and development. The functions of PSI have been characterized in the lepidopteran model species Bombyx mori. Read More

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Identification of ABCG transporter genes associated with chlorantraniliprole resistance in Plutella xylostella (L.).

Pest Manag Sci 2021 Jul 22;77(7):3491-3499. Epub 2021 Apr 22.

Department of Entomology, China Agricultural University, Beijing, P. R. China.

Background: Plutella xylostella (L.) is a serious worldwide pest that feeds on cruciferous plants and has evolved resistance to different classes of insecticides used for its control, including chlorantraniliprole. ATP-binding cassette (ABC) transporters, constituting the largest transport family in organisms, are involved in phase III of the detoxification process and may play important roles in insecticide resistance. Read More

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CRISPR/Cas9-mediated knockout of LW-opsin reduces the efficiency of phototaxis in the diamondback moth Plutella xylostella.

Pest Manag Sci 2021 Jul 12;77(7):3519-3528. Epub 2021 May 12.

State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China.

Background: Opsins are crucial for animal vision. The identity and function of opsins in Plutella xylostella remain unknown. The aim of the research is to confirm which opsin gene(s) contribute to phototaxis of P. Read More

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Assessing the Single and Combined Toxicity of Chlorantraniliprole and (GO33A) against Four Selected Strains of (Lepidoptera: Plutellidae), and a Gene Expression Analysis.

Toxins (Basel) 2021 03 22;13(3). Epub 2021 Mar 22.

Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.

Concerns about resistance development to conventional insecticides in diamondback moth (DBM) (L.) the most destructive pest of vegetables, have stimulated interest in alternative pest management strategies. The toxicity of subsp. Read More

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Cabbage Production in West Africa and IPM with a Focus on Plant-Based Extracts and a Complementary Worldwide Vision.

Plants (Basel) 2021 Mar 11;10(3). Epub 2021 Mar 11.

Laboratoire d'Ecologie et d'Ecotoxicologie, Faculté des Sciences, Université de Lomé, Lomé 1 01B.P. 1515, Togo.

In urban and peri-urban areas in West Africa, the cabbage L. (Brassicaceae) is protected using repeated high doses of synthetic insecticides. After a brief description of available IPM components, this paper presents a literature review focused on the botanical extracts that have been experimented with at the laboratory or in the field in West Africa against major cabbage pests. Read More

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Diversity of short interspersed nuclear elements (SINEs) in lepidopteran insects and evidence of horizontal SINE transfer between baculovirus and lepidopteran hosts.

BMC Genomics 2021 Mar 31;22(1):226. Epub 2021 Mar 31.

College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, China.

Background: Short interspersed nuclear elements (SINEs) belong to non-long terminal repeat (non-LTR) retrotransposons, which can mobilize dependent on the help of counterpart long interspersed nuclear elements (LINEs). Although 234 SINEs have been identified so far, only 23 are from insect species (SINEbase: http://sines.eimb. Read More

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