Mortality of Oryzophagus oryzae (Costa Lima, 1936) (Coleoptera: Curculionidae) and Spodoptera frugiperda (J E Smith, 1797) (Lepidoptera: Noctuidae) Larvae Exposed to Bacillus thuringiensis and Extracts of Melia azedarach

Berlitz, Diouneia Lisiane; Azambuja, Aline Oliboni de; Sebben, A. M.; Oliveira, Jaime Vargas de; Fiúza, Lidia Mariana

doi:10.1590/s1516-89132012000500012

Cited by 9 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A well-known bio-insecticide, B. thuringiensis , can control a broad range of diverse insects for pest management in the agricultural field (Navon, 2000 ). For example, the insects Helicoverpa armigera, Spodoptera littoralis, Oryzophagus oryzae, Spodoptera frugiperda , and Chilo partellus are damaging to plant growth and fruit, but B. thuringiensis inhibits the larval growth of insects and increases plant growth and yield (Brownbridge, 2001 ; Berlitz et al, 2012 ; Benfarhat-Touzri et al, 2014 ; Arrizubieta et al, 2016 ) without affecting other microbial populations within the phyllosphere (Wang et al, 2014 ). Some other Bacillus spp., such as B. cereus, B. subtilis , and B. amyloliquefaciens , are also involved in pest control (Gadhave and Gange, 2016 ).…”

Section: Mitigation Of Biotic Stresses In Plants By Bacillumentioning

confidence: 99%

Bacillus: A Biological Tool for Crop Improvement through Bio-Molecular Changes in Adverse Environments

2017

View full text Add to dashboard Cite

Crop productivity is affected by environmental and genetic factors. Microbes that are beneficial to plants are used to enhance the crop yield and are alternatives to chemical fertilizers and pesticides. Pseudomonas and Bacillus species are the predominant plant growth-promoting bacteria. The spore-forming ability of Bacillus is distinguished from that of Pseudomonas. Members of this genus also survive for a long time under unfavorable environmental conditions. Bacillus spp. secrete several metabolites that trigger plant growth and prevent pathogen infection. Limited studies have been conducted to understand the physiological changes that occur in crops in response to Bacillus spp. to provide protection against adverse environmental conditions. This review describes the current understanding of Bacillus-induced physiological changes in plants as an adaptation to abiotic and biotic stresses. During water scarcity, salinity and heavy metal accumulate in soil, Bacillus spp. produce exopolysaccharides and siderophores, which prevent the movement of toxic ions and adjust the ionic balance and water transport in plant tissues while controlling the pathogenic microbial population. In addition, the synthesis of indole-3-acetic acid, gibberellic acid and1-aminocyclopropane-1-carboxylate (ACC) deaminase by Bacillus regulates the intracellular phytohormone metabolism and increases plant stress tolerance. Cell-wall-degrading substances, such as chitosanase, protease, cellulase, glucanase, lipopeptides and hydrogen cyanide from Bacillus spp. damage the pathogenic bacteria, fungi, nematodes, viruses and pests to control their populations in plants and agricultural lands. The normal plant metabolism is affected by unfavorable environmental stimuli, which suppress crop growth and yield. Abiotic and biotic stress factors that have detrimental effects on crops are mitigated by Bacillus-induced physiological changes, including the regulation of water transport, nutrient up-take and the activation of the antioxidant and defense systems. Bacillus association stimulates plant immunity against stresses by altering stress-responsive genes, proteins, phytohormones and related metabolites. This review describes the beneficial effect of Bacillus spp. on crop plants, which improves plant productivity under unfavorable climatic conditions, and the current understanding of the mitigation mechanism of Bacillus spp. in stress-tolerant and/or stress-resistant plants.

show abstract

Section: Mitigation Of Biotic Stresses In Plants By Bacillumentioning

confidence: 99%

Bacillus: A Biological Tool for Crop Improvement through Bio-Molecular Changes in Adverse Environments

2017

View full text Add to dashboard Cite

show abstract

“…Beta-exotoxin and the other Bacillus toxins (δ-endotoxins) may contribute to the general insecticidal toxicity of the bacterium to lepidopteran, dipteran, and coleopteran insects. Beta-exotoxin is known to be toxic to humans and almost all other forms of life and, in fact, its presence is prohibited in Bt products [23]. Engineering of plants to contain and express only the genes for δ-endotoxins avoids the problem of assessing the risks posed by these other toxins that may be produced in microbial preparations [24].…”

Section: Bt Toxinsmentioning

confidence: 99%

An Overview on the Crystal Toxins from <i>Bacillus thuringiensis</i>

Jisha¹,

Smitha²,

Benjamin³

2013

AiM

View full text Add to dashboard Cite

Strains of Bacillus thuringiensis (Bt) are known to produce crystalline proteins (δ-endotoxins) concomitantly with sporulation during their stationary phase of growth, which are demonstrated as lethal to lepidopeterous, coleopeterous and dipterous insects in addition to mites, nematodes, protozoa and flukes. Upon ingestion, the δ-nascent endotoxin is an inactive protoxin complex of (Cry alone or Cry and Cyt toxins together) high molecular mass, which is cleaved upon ingestion into the active component proteins at the high alkaline environments in the digestive tract of these agricultural pests. Conventionally, Bt-crystals are being produced employing submerged or liquid fermentation techniques in commercial media, but recently many workers have used solid-state fermentation strategy for the enhanced production of Bt-toxin at low cost. Apart from δ-endotoxin, some isolates of Bt produce another class of insecticidal small molecules called β-exotoxin (thuringiensin), which may be harmful to humans. Moreover, resistance to Bt developed in various target pest is yet another concern for Bt-industry. Following a brief introduction, this review addresses various toxins produced by various strains of Bt, Bt production media and media formulations with emphasis to solid-state fermentation, general structure of Cry toxin, its mode of action, target pests, bioassay, resistance to Bt toxins and resistance management. Briefly, this review would provide the readers an overview on the general aspects of Bt toxin, its general structure and mechanism of action.

show abstract

“…The control of this pest is usually made with the use of synthetic insecticides (Tavares et al, 2010a;Wititsiri, 2011) which, although effective, can cause various problems, such as the presence of residues in food, poisoning of applicators, and outbreaks of secondary pests (Roel et al, 2000;Berlitz et al, 2012). Furthermore, the continued use of these pesticides may aid in development of a resistant pest population (Munoz et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Biological activity of sugarcane pyroligneous acid against Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) larvae

Douglas¹,

Marcos²,

Favero³

et al. 2013

Afr. J. Biotechnol.

View full text Add to dashboard Cite

Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) annually cause enormous loss to the producers and their combat has become a worldwide challenge mainly due to several reports of pesticides resistance. Today, one of the best alternatives used in this combat is the application of natural insecticides such as neem oil and pyroligneous acid. This study demonstrates a method to obtain a hexane fraction from sugarcane pyroligneous acid, which can be easily applied, as well as its effectiveness against S. frugiperda. The hexane fraction exhibited LC 50 of 2206,41 ppm after 24 h of exposure with a linear dose-response, indicating that the fraction can be used as a bio-insecticide against S. frugiperda.

show abstract

Mortality of Oryzophagus oryzae (Costa Lima, 1936) (Coleoptera: Curculionidae) and Spodoptera frugiperda (J E Smith, 1797) (Lepidoptera: Noctuidae) Larvae Exposed to Bacillus thuringiensis and Extracts of Melia azedarach

Abstract: Oryzophagus oryzae (Costa Lima 1936) (Coleoptera: Curculionidae)

Cited by 9 publications

References 24 publications

Bacillus: A Biological Tool for Crop Improvement through Bio-Molecular Changes in Adverse Environments

Bacillus: A Biological Tool for Crop Improvement through Bio-Molecular Changes in Adverse Environments

An Overview on the Crystal Toxins from <i>Bacillus thuringiensis</i>

Biological activity of sugarcane pyroligneous acid against Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) larvae

Contact Info

Product

Resources

About

Mortality of Oryzophagus oryzae (Costa Lima, 1936) (Coleoptera: Curculionidae) and Spodoptera frugiperda (J E Smith, 1797) (Lepidoptera: Noctuidae) Larvae Exposed to Bacillus thuringiensis and Extracts of Melia azedarach

Abstract: Oryzophagus oryzae (Costa Lima 1936) (Coleoptera: Curculionidae)

Cited by 9 publications

References 24 publications

Bacillus: A Biological Tool for Crop Improvement through Bio-Molecular Changes in Adverse Environments

Bacillus: A Biological Tool for Crop Improvement through Bio-Molecular Changes in Adverse Environments

An Overview on the Crystal Toxins from &lt;i&gt;Bacillus thuringiensis&lt;/i&gt;

Biological activity of sugarcane pyroligneous acid against Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) larvae

Contact Info

Product

Resources

About

An Overview on the Crystal Toxins from <i>Bacillus thuringiensis</i>