Lepidopteran pests
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Ebook "Biocontrol of lepidopteran pests: Use of soil microbes and their metabolites (Soil biology, Volume 43)" describes the various applications of entomopathogenic soil microorganisms in the management and control of the devastating lepidopteran pest. An introduction describes the insecticidal properties of viruses, bacteria, fungi, nematodes and their metabolites, as well as their applications in the context of crop improvement.
351p manmanthanhla0201 26-02-2024 9 1 Download
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In the present study, we measured larval phenotypic and transcriptomic responses to host plants in two related phytophagous lepidopteran species: the European corn borer (ECB), a worldwide pest of maize, and the adzuki bean borer (ABB), which feeds of various dicotyledons. Our aim was to identify the genes and functions underlying host specialization and/or divergence between ECB and ABB.
14p vibeauty 23-10-2021 10 1 Download
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A change in the environment may impair development or survival of living organisms leading them to adapt to the change. The resulting adaptation trait may reverse, or become fixed in the population leading to evolution of species. Deciphering the molecular basis of adaptive traits can thus give evolutionary clues. In phytophagous insects, a change in host-plant range can lead to emergence of new species.
15p vitzuyu2711 29-09-2021 7 1 Download
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The degree to which adaptation to same environment is determined by similar molecular mechanisms, is a topic of broad interest in evolutionary biology, as an indicator of evolutionary predictability. We wished to address if adaptation to the same host plant in phytophagous insects involved related gene expression patterns.
18p vitzuyu2711 29-09-2021 12 1 Download
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Mermithid nematodes, such as Ovomermis sinensis, display a broad host range including some lepidopteran pests. Infective juveniles penetrate their host through the cuticle, complete their growth within the hemocoel and eventually kill the host upon their emergence. Hence, mermithid nematodes are considered potential biological control agents of insect pests.
11p visilicon2711 20-08-2021 13 1 Download
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In this backdrop, the present study has been undertaken to study the toxicity of some new generation insecticide molecules to two parasitoids of lepidopteran crop pest namely, Trichogramma chilonis Ishii. and Bracon brevicornis Wesmael.
7p nguaconbaynhay8 13-10-2020 4 2 Download
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The present study was undertaken with the main objective of generating data on the yield losses caused by lepidopteran pests in castor...
5p nguaconbaynhay7 15-08-2020 18 1 Download
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The fall armyworm, Spodoptera frugiperda (J. E. Smith) is a highly notorious lepidopteran pest which is causing severe economic loss in different crops, especially maize. A study was conducted to know the biology of S. frugiperda on maize during July-December, 2019 under laboratory conditions at the Department of Entomology, Rajasthan College of Agriculture, MPUAT, Udaipur.
8p caygaocaolon6 30-07-2020 16 2 Download
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The insecticidal chimeric cry2AX1 gene was introduced into rice indica cultivar ASD16 with a view to impart resistance to a major lepidopteran pest, rice leaf folder. A total of 17 putative transgenic events were generated with two different constructs harbouringcry2AX1 gene and all of them were found to be positive for cry2AX1and hptII genes. The Cry2AX1 protein expression in T0transgenic rice events ranged from 0.021 to 0.093 μg/g of fresh leaf tissue.
12p trinhthamhodang5 16-05-2020 15 0 Download
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The present study was conducted for efficient parasitization and efficacy of the three gravid female of Trichogramma chilonis (Ishii) against important lepidopteran pests viz., H. armigera, E. vitella, P. demoleus, A. janata and C. cephalonica, having 24, 48, and 72 hrs old age eggs were exposed to three gravid females of Trichogramma chilonis. Laboratory experiments were carried out at the college of Agriculture, Nagpur and CICR...
9p nguaconbaynhay5 16-05-2020 10 2 Download
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Bacillum thuringiensis (Bt) toxin produced in Cry1-expressing genetically modified rice (Bt rice) is highly effective to control lepidopteran pests, which reduces the needs for synthetic insecticides. Non-target organisms can be exposed to Bt toxins through direct feeding or trophic interactions in the field.
10p vihamax2711 21-04-2020 8 0 Download
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Shallot, Allium cepa var aggregatum L. (Alliaceae) is one of the major bulbous vegetable grown both as garden and field crop in India. The major leaf feeding insect pests of onion, Spodoptera exigua, Spodoptera litura, Helicoverpa armigera and the recently invasive insect Spodoptera frugiperda were causing destructive damage to the plant and made economic yield loss. Food consumption indices were studied under laboratory condition at room temperature 28 ± 20C and it is one of the parameter to identify the damage potential of insects.
11p chauchaungayxua3 07-02-2020 13 1 Download
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Significant morphological similarities within or in between species of insects has made reliable taxonomic identification difficult. DNA barcoding has appeared to be a useful tool in resolving the issues related to the identification of taxonomically difficult insect species. The Northeastern region of India is one of the mega biodiversity hotspots in the World and the climatic conditions of the region are highly conducive for reproduction and multiplication of insects.
11p cothumenhmong1 08-12-2019 12 0 Download
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Ecdysteroids are hormones with an important role in the molting, reproduction and immunological defense of arthropods. Ecdysone Receptor (EcR) is a protein that belongs to the superfamily of nuclear receptors, widely studied for pesticide discovery. Currently, several non-steroidal molecules, belonging to the chemical group of diacilhydrazines (DAH), are commercially available for pest control. Such molecules are specific for lepidopteran or coleopteran pests. Hemipterans are important pests in most crops and many cases of pesticide resistance are reported.
10p chauchaungayxua1 04-12-2019 14 1 Download
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Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae) is an important pest in Turkey and causes extensive economic losses in many cultivated crops. The viruses within the family Baculoviridae are specific pathogens of insects. The nucleopolyhedroviruses (NPVs), 1 of the 2 genera of this family, have been isolated from many insect orders, primarily from the lepidopterans.
7p vitamix 15-02-2019 18 0 Download
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Entomophaga aulicae was monitored in populations of noctuid lepidopteran pests of soybean during the 2000, 2001, and 2002 growing seasons in South Carolina and infected only Plathypena scabra larvae. No infection by E. aulicae was detected in 2002.
6p vitamix 15-02-2019 10 0 Download
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Pine processionary moth, Thaumetopoea wilkinsoni Tams, is an important defoliating lepidopteran pest of pine trees. The aim of this study was to determine the required spore–crystal concentration of local Bacillus thuringiensis (Bt) isolates, optimal ambient temperature, and larval stage to control this troublesome forest pest.
10p vimb123 11-01-2019 13 1 Download
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Bacillus thuringiensis has a significant impact on biological pest control because of the insecticidal activity through its parasporal inclusion bodies (crystal proteins). Fig is an economically important plant in Turkey, agricultural pests result in a considerable economic loss in fig quality and cultivation.
10p vimb123 11-01-2019 25 1 Download
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Calosoma sycophanta L. (Coleoptera: Carabidae) is a voracious predatory beetle that feeds on several important lepidopteran pests. It is mass reared in laboratory breeding and released against forest pests. Any infection in this beetle is undesirable because it impacts production of effective and healthy beetles.
5p danhdanh11 09-01-2019 14 2 Download
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Carboxypeptidases were purified fromguts of larvae of corn earworm (Helicoverpa armigera), a lepidopteran crop pest, by affinity chromatography on immobilized potato carb-oxypeptidase inhibitor, and characterized by N-terminal sequencing. A larval gut cDNA library was screened using probes based on these protein sequences. cDNA HaCA42 encoded a carboxypeptidase with sequence similarity to enzymesofclan MC [Barrett,A.J.,Rawlings,N. D.& Woessner, J. F. (1998)Handbook of Proteolytic Enzymes. Academic Press, London.], but with a novel predicted spe-cificity towards C-terminal acidic residues....
12p dell39 03-04-2013 41 2 Download