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1. First record of Peridroma saucia Hübner (Lepidoptera: Noctuidae) in transgenic soybeans

Author:
Takahashi, Tamara A.; Nishimura, Guilherme; Carneiro, Eduardo; Foerster, Luís A.
Source:
Revista Brasileira de entomologia 2019 v.63 no.3 pp. 199-201
ISSN:
0085-5626
Subject:
insecticidal proteins,   etc   ; Anticarsia gemmatalis; Bacillus thuringiensis; Erebidae; Peridroma saucia; Pseudoplusia includens; crop production; cultivars; insect larvae; soybeans; transgenic plants; Brazil;     Show all 12 Subjects
Abstract:
... The widespread cultivation of transgenic soybeans has caused significant changes in the spectrum of Lepidoptera larvae, both in the number of species as well as on their densities in the field. Transgenic crops producing Bacillus thuringiensis (Bt) insecticidal proteins have successfully reduced the incidence of the most common caterpillars infesting soybeans, namely Anticarsia gemmatalis (Lepidop ...
DOI:
10.1016/j.rbe.2019.05.006

2. Baseline susceptibility of Asian corn borer (Ostrinia furnacalis (Guenée)) populations in Vietnam to Cry1Ab insecticidal protein

Author:
Le, Duc Khanh; Le, Quang Khai; Tran, Thi Thuy Hang; Nguyen, Duc Viet; Dao, Thi Hang; Nguyen, Thi Thuy; Truong, Xuan Lam; Nguyen, Quang Cuong; Pham, Huy Phong; Phan, Thi Thu Thuy; Baktavachalam, Gajendra Babu
Source:
Journal of Asia-Pacific entomology 2019 v.22 no.2 pp. 493-498
ISSN:
1226-8615
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Ostrinia furnacalis; bioassays; diet; growth retardation; lethal concentration 50; monitoring; mortality; neonates; Vietnam;     Show all 11 Subjects
Abstract:
... Susceptibility of Asian corn borer (ACB), Ostrinia furnacalis (Guenée) to Bacillus thuringiensis (Bt) Cry1Ab protein was studied between 2015 and 2016 with 11 ACB populations, collected from various geographical regions in Vietnam. A concentration range of Cry1Ab from 0.20 to 26.10 ng/cm2 of diet was evaluated against F1 ACB neonates using diet surface-overlay bioassays. Mortality data was recorde ...
DOI:
10.1016/j.aspen.2019.02.010

3. Mechanisms of resistance to commercially relevant entomopathogenic bacteria

Author:
de Bortoli, Caroline Placidi; Jurat-Fuentes, Juan Luis
Source:
Current opinion in insect science 2019 v.33 pp. 56-62
ISSN:
2214-5745
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Gram-positive bacteria; commercialization; crops; entomopathogenic bacteria; genes; insecticides; insects; receptors; risk; sustainable agriculture; transgenic plants;     Show all 13 Subjects
Abstract:
... Bacteria represent the most commercially successful entomopathogenic microbial group, with most commercialized insecticides containing gram-positive bacteria in the Bacillaceae family. Resistance to entomopathogenic bacteria threatens sustainable agriculture, and information on the mechanisms and genes involved is vital to develop management practices aimed at reducing this risk. We provide an int ...
DOI:
10.1016/j.cois.2019.03.007

4. Lipid phase influences the binding of Bacillus thuringiensis Cyt2Aa2 toxin on model lipid membranes

Author:
Tharad, Sudarat; Promdonkoy, Boonhiang; Toca-Herrera, José L.
Source:
Biochemical and biophysical research communications 2019
ISSN:
0006-291X
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Diptera; atomic force microscopy; bacteria; insects; lipid bilayers; lipids; models; quartz crystal microbalance; separation; toxicity; toxins;     Show all 13 Subjects
Abstract:
... Bacillus thuringiensis is a bacterium that produces many insecticidal proteins including cytolytic proteins or Cyt toxins. Although the Cyt toxin shows specific toxicity against Dipteran insect species, the toxin binds directly to the lipid membrane without a specific protein receptor requirement. In this work, we have investigated the interaction of Cyt2Aa2 toxin with lipid bilayers composed of d ...
DOI:
10.1016/j.bbrc.2019.02.072

5. Expression of cry genes in Bacillus thuringiensis biotechnology

Author:
Peng, Qi; Yu, Qingyue; Song, Fuping
Source:
Applied microbiology and biotechnology 2019 v.103 no.4 pp. 1617-1626
ISSN:
0175-7598
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; biotechnology; crystal proteins; crystals; genes; hosts; niches; research and development; spore-forming bacteria; sporulation;     Show all 11 Subjects
Abstract:
... Bacillus thuringiensis is a gram-positive, spore-forming bacterium that produces insecticidal crystal proteins during sporulation. The production of these crystals results primarily from the expression of cry genes. In this review, we focus on the expression and application of cry genes directed by both cry gene promoters and non-cry gene promoters in different hosts. However, not all cry genes an ...
DOI:
10.1007/s00253-018-9552-x

6. Bt-induced hormesis in Bt-resistant insects: Theoretical possibility or factual concern?

Author:
Campos, Silvério O.; Santana, Isabella V.; Silva, Cleomar; Santos-Amaya, Oscar F.; Guedes, Raul Narciso C.; Pereira, Eliseu José G.
Source:
Ecotoxicology and environmental safety 2019
ISSN:
0147-6513
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Spodoptera frugiperda; Zea mays; artificial diets; bacterial proteins; bioassays; corn; ecotoxicology; genotype; hormesis; insecticides; insects; pests; population growth; risk; toxicity; toxins; transgenic plants;     Show all 19 Subjects
Abstract:
... The biphasic dose-response of a stressor where low amounts of a toxicant may stimulate some biological processes is a recent focus of attention in insecticide ecotoxicology. Nonetheless, the importance and management consequences of this phenomenon of pesticide-induced hormesis remain largely unrecognized. Curiously, the potential induction of hormesis by insecticidal proteins such as Bacillus thu ...
DOI:
10.1016/j.ecoenv.2019.109577

7. Phenotypic performance of nine genotypes of Cry1A.105/Cry2Ab2 dual‐gene resistant fall armyworm on non‐Bt and MON 89034 maize

Author:
Niu, Ying; Guo, Jianguo; Head, Graham P; Price, Paula A; Huang, Fangneng
Source:
Pest management science 2019 v.75 no.8 pp. 2124-2132
ISSN:
1526-498X
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Spodoptera frugiperda; alleles; corn; crops; crystal proteins; homozygosity; leaves; models; pest management; pests; phenotype; progeny; refining; risk assessment; transgenic plants;     Show all 17 Subjects
Abstract:
... BACKGROUND: The fall armyworm, Spodoptera frugiperda (J.E. Smith), is the first target pest that has developed resistance to Bt crops across several countries. Leaf tissue and whole plant assays were employed to determine the survival, development, progeny production, and net reproductive rate of all nine possible genotypes of Cry1A.105/Cry2Ab2‐dual gene resistant S. frugiperda on non‐Bt and MON 8 ...
DOI:
10.1002/ps.5331

8. Insecticidal fern protein Tma12 is possibly a lytic polysaccharide monooxygenase

Author:
Yadav, Sunil K.; Archana,; Singh, Rahul; Singh, Pradhyumna Kumar; Vasudev, Prema G.
Source:
Planta 2019 v.249 no.6 pp. 1987-1996
ISSN:
0032-0935
Subject:
insecticidal proteins,   etc   ; Aleyrodidae; Streptomyces coelicolor; Tectaria; amino acid sequences; carbohydrate binding; cotton; crystal structure; ferns and fern allies; insecticidal properties; oxygenases; plant proteins; polysaccharides; sequence analysis; transgenic plants;     Show all 15 Subjects
Abstract:
... MAIN CONCLUSION: Amino acid sequence and crystal structure analyses of Tma12, an insecticidal protein isolated from the fern Tectaria macrodonta, identify it as a carbohydrate-binding protein belonging to the AA10 family of lytic polysaccharide monooxygenases, and provide the first evidence of AA10 proteins in plants. Tma12, isolated from the fern Tectaria macrodonta, is a next-generation insectic ...
DOI:
10.1007/s00425-019-03135-0

9. Field-evolved resistance of Helicoverpa zea (Boddie) to transgenic maize expressing pyramided Cry1A.105/Cry2Ab2 proteins in northeast Louisiana, the United States

Author:
Kaur, Gagandeep; Guo, Jianguo; Brown, Sebe; Head, Graham P.; Price, Paula A.; Paula-Moraes, Silvana; Ni, Xinzhi; Dimase, Marcelo; Huang, Fangneng
Source:
Journal of invertebrate pathology 2019 v.163 pp. 11-20
ISSN:
0022-2011
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Helicoverpa zea; Zea mays; bacterial proteins; bioassays; corn; cotton; crystal proteins; field experimentation; insects; larvae; pests; plant proteins; transgenic plants; Florida; Georgia; Louisiana;     Show all 18 Subjects
Abstract:
... The corn earworm, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae), is a major target pest of pyramided Bt maize and cotton in the U.S. In 2017 and 2018, notable ear damage and larval survival of H. zea were observed on pyramided Cry1A.105/Cry2Ab2 maize in some fields in northeast Louisiana, U.S. The objective of this study was to determine if the field control problem was due to resistance devel ...
DOI:
10.1016/j.jip.2019.02.007

10. No detrimental effect of Bt maize pollen containing Cry1Ab/2Aj or Cry1Ac on adult green lacewings Chrysoperla sinica Tjeder

Author:
LIU, Yan-min; LI, Yun-he; CHEN, Xiu-ping; SONG, Xin-yuan; SHEN, Ping; PENG, Yu-fa
Source:
Journal of integrative agriculture 2019 v.18 no.4 pp. 893-899
ISSN:
2095-3119
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Chrysoperla; adults; corn; crystal proteins; dietary exposure; enzyme-linked immunosorbent assay; fecundity; genes; laboratory experimentation; pollen; risk; transgenic plants;     Show all 14 Subjects
Abstract:
... Adult Chrysoperla sinica Tjeder is a common pollen feeder in maize fields. They are thus directly exposed to insecticidal proteins by consumption of genetically engineered maize pollen containing Bacillus thuringiensis (Bt) proteins. Here we assessed the potential effects of Cry1Ab/2Aj- or Cry1Ac-containing Bt maize pollen on the fitness of adult C. sinica via a dietary-exposure assay under labora ...
DOI:
10.1016/S2095-3119(17)61887-2

11. Field monitoring of Helicoverpa armigera (Lepidoptera: Noctuidae) Cry1Ac insecticidal protein resistance in China (2005–2017)

Author:
Dandan, Zhang; Yutao, Xiao; Wenbo, Chen; Yanhui, Lu; Kongming, Wu
Source:
Pest management science 2019 v.75 no.3 pp. 753-759
ISSN:
1526-498X
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Helicoverpa armigera; cotton; crystal proteins; guidelines; inhibitory concentration 50; instars; larval development; monitoring; pest management; transgenic plants; China;     Show all 13 Subjects
Abstract:
... BACKGROUND: Bt cotton expressing Cry1Ac can efficiently control Helicoverpa armigera, but field‐evolved Bt resistance reduces its efficacy. Susceptibility of H. armigera field populations to Cry1Ac protein has been monitored since Bt cotton was commercialized in 1997 in China. Here we report the results of our continued monitoring from 2005 to 2017 to provide important guidelines for sustainably g ...
DOI:
10.1002/ps.5175

12. Survival and effective dominance level of a Cry1A.105/Cry2Ab2-dual gene resistant population of Spodoptera frugiperda (J.E. Smith) on common pyramided Bt corn traits

Author:
Zhu, Chengqi; Niu, Ying; Zhou, Yiwan; Guo, Jianguo; Head, Graham P.; Price, Paula A.; Wen, Xiujun; Huang, Fangneng
Source:
Crop protection 2019 v.115 pp. 84-91
ISSN:
0261-2194
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Spodoptera frugiperda; Zea mays; bacterial proteins; bioassays; corn; crops; cross resistance; crystal proteins; genes; heterozygosity; larvae; leaves; pests; resistance management; survival rate; transgenic plants;     Show all 18 Subjects
Abstract:
... The fall armyworm, Spodoptera frugiperda (J.E.Smith.), is an important pest that has developed resistance to Bt corn in several countries. In this study, leaf-tissue bioassays and whole-plant tests were conducted to evaluate the performance of a Bt-susceptible (aabb), a Cry1A.105/Cry2Ab2 dual-gene resistant (AABB), and a heterozygous (AaBa) genotypes of S. frugiperda on two non-Bt and five pyramid ...
DOI:
10.1016/j.cropro.2018.09.008
CHORUS:
10.1016/j.cropro.2018.09.008

13. Tyrosine-776 of Vip3Aa64 from Bacillus thuringiensis is Important for Retained Larvicidal Activity During High-Temperature Storage

Author:
Soonsanga, Sumarin; Rungrod, Amporn; Audtho, Mongkon; Promdonkoy, Boonhiang
Source:
Current microbiology 2019 v.76 no.1 pp. 15-21
ISSN:
0343-8651
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Spodoptera exigua; amino acid substitution; amino acids; insects; larvicides; pest control; shelf life; storage temperature; thermal stability; toxicity; Thailand;     Show all 13 Subjects
Abstract:
... Vip3Aa (vegetative insecticidal protein) secreted by Bacillus thuringiensis (Bt) is highly toxic to lepidopteran insects. The Bt isolate M190 produces Vip3Aa35 at high concentrations, and Vip3Aa35 was found to be very effective against Spodoptera exigua. Unfortunately, the use of Vip3Aa35 in pest control is limited by its short shelf life when stored at high temperatures, retaining activity for on ...
DOI:
10.1007/s00284-018-1578-x

14. Small insecticidal molecules against crop pests

Author:
Nayyar, Nishtha; Bhatnagar, Raj K.
Source:
Biocontrol science and technology 2018 v.28 no.10 pp. 927-937
ISSN:
1360-0478
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; RNA interference; biopesticides; chemical control; crop losses; insecticides; insects; plant pests; toxins;     Show all 10 Subjects
Abstract:
... Previous decades have seen excessive use of chemical insecticides to control insect-mediated crop losses. However, toxicological and ecological concerns lead to the quest for more sustainable biological molecules as an alternative. Advent of Bt technology witnessed its supersession over chemical control measures and reinvigorated the potential of bioinsecticides as a commercially viable option. Bu ...
DOI:
10.1080/09583157.2018.1469729

15. Genome sequencing of Bacillus thuringiensis isolate T414 toxic to pink bollworm (Pectinophora gossypiella Saunders) and its insecticidal genes

Author:
Reyaz, A.L.; Balakrishnan, N.; Udayasuriyan, V.
Source:
Microbial pathogenesis 2019 v.134 pp. 103553
ISSN:
0882-4010
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Pectinophora gossypiella; automation; bacterial toxins; bacteriocins; biopesticides; chitinase; chromosomes; crystal proteins; genes; hemolysins; molecular cloning; plasmids; polyacrylamide gel electrophoresis; proteinases; ribosomal RNA; scanning electron microscopy; sequence analysis; spore-forming bacteria; transfer RNA; virulence;     Show all 22 Subjects
Abstract:
... Bacillus thuringiensis is a spore-forming bacterium that is pathogenic towards a range of insect and nematode species and had been widely used as a biopesticide. In this study, we present the morphological, molecular and genetic characteristics of an indigenous Bt isolate T414 which displayed an effective toxicity against Pectinophora gossypiella. Scanning electron microscopy revealed the presence ...
DOI:
10.1016/j.micpath.2019.103553

16. Persistence of insecticidal Cry toxins in Bt rice residues under field conditions estimated by biological and immunological assays

Author:
Deng, Jiaxin; Wang, Yongmo; Yang, Fengying; Liu, Yue; Liu, Biao
Source:
The Science of the total environment 2019 v.679 pp. 45-51
ISSN:
0048-9697
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Chilo suppressalis; adverse effects; artificial diets; bioassays; boring insects; crops; detection limit; enzyme-linked immunosorbent assay; flooded conditions; nontarget organisms; rice; risk; straw; toxins; transgenic plants;     Show all 17 Subjects
Abstract:
... One risk of growing Bacillus thuringiensis (Bt) crops is the potential nontarget effects which are likely related to the environmental behavior of crystal (Cry) toxins. Bt rice residues left in field after harvest constitute a main source of Cry toxins entering the environment. To our knowledge, very few studies have simultaneously evaluated the persistence of Cry toxins in Bt rice residues under ...
DOI:
10.1016/j.scitotenv.2019.05.026

17. Transcriptome and differentially expressed genes of Busseola fusca (Lepidoptera: Noctuidae) larvae challenged with Cry1Ab toxin

Author:
Peterson, Bianca; Sanko, Tomasz Janusz; Bezuidenhout, Cornelius Carlos; van den Berg, Johnnie
Source:
Gene 2019 v.710 pp. 387-398
ISSN:
0378-1119
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Busseola fusca; corn; crystal proteins; defense mechanisms; gene expression; gene expression regulation; genes; insect pests; insect resistance; insecticides; larvae; messenger RNA; neonates; resistance management; solutes; toxins; transcriptome; transgenic plants; Sub-Saharan Africa;     Show all 21 Subjects
Abstract:
... Busseola fusca (Fuller) (Lepidoptera: Noctuidae), a major insect pest of maize in sub-Saharan Africa, has developed high levels of non-recessive resistance to Cry1Ab toxin expressed in genetically modified Bt maize. Multiple resistance mechanisms to various Cry toxins have been identified in Lepidoptera, but no study has yet been done to determine the mechanism of Cry1Ab resistance in B. fusca. Th ...
DOI:
10.1016/j.gene.2019.05.048

18. Degradation of transgenic Bt-rice straw incorporated with two different paddy soils

Author:
Liu, Ling; Wu, Longhua; Knauth, Stefan; Eickhorst, Thilo
Source:
Journal of environmental management 2019 v.244 pp. 415-421
ISSN:
0301-4797
Subject:
insecticidal proteins,   etc   ; Archaea; Bacillus thuringiensis; bacteria; carbon dioxide; greenhouse gas emissions; laboratory experimentation; methane; methane production; microbial communities; paddy soils; rice; rice straw; risk; silt loam soils; silty clay soils; soil respiration; soil structure; transgenic plants;     Show all 19 Subjects
Abstract:
... Transgenic Bt-rice is rice that has been genetically modified to produce insecticidal proteins (Cry1Ab/Ac) within the plant. Rice straw is incorporated into paddy soils after harvest for fertilization or to improve the soil structure. The incorporation of straw from transgenic Bt-rice may pose risks to the paddy soil system. The decomposition of Bt-rice straw and degradation of Cry1Ab/Ac proteins ...
DOI:
10.1016/j.jenvman.2019.05.075

19. Resolving the pathogenicity factors of a novel opportunistic fungus Schizophyllum commune at molecular level

Author:
Viswanathan, Kasi; Kumaresan, Venkatesh; Sannasimuthu, Anbazahan; Paray, Bilal Ahmad; Al-Sadoon, Mohammad K.; Arockiaraj, Jesu
Source:
Molecular biology reports 2019 v.46 no.4 pp. 3877-3886
ISSN:
0301-4851
Subject:
insecticidal proteins,   etc   ; Schizophyllum commune; animal pathogens; beta-N-acetylhexosaminidase; crystal proteins; freshwater fish; humans; mushrooms; nutritive value; pathogenesis; phospholipase C; quantitative polymerase chain reaction; reverse transcriptase polymerase chain reaction; secondary infection; sequence analysis; toxins; virulence; wood;     Show all 18 Subjects
Abstract:
... Schizophyllum commune is a well-known mushroom forming fungi which is an edible one due to its nutritive value. It exhibits a special wood degrading mechanism to grow in decay matters by releasing a series of enzymes. These enzymes might make them an opportunistic pathogen which has been reported to infect various animals and human beings too. Although these fungi were identified as human and anim ...
DOI:
10.1007/s11033-019-04830-7

20. Susceptibility of Field Populations of Eggplant Fruit and Shoot Borer (<i>Leucinodes orbonalis</i> Guenée) to Cry1Ac, the Protein Expressed in Bt Eggplant (<i>Solanum melongena</i> L.) in Bangladesh

Author:
Prodhan, Md. Zulfikar Haider; Shirale, Dattatray K.; Islam, Md. Zaherul; Hossain, Md. Jahangir; Paranjape, Vijay; Shelton, Anthony M.
Source:
Insects 2019 v.10 no.7
ISSN:
2075-4450
Subject:
insecticidal proteins,   etc   ; Bacillus thuringiensis; Leucinodes orbonalis; Solanum melongena; adults; bioassays; commercialization; eggplants; eggs; fruits; hatching; insect pests; insect resistance; larvae; lethal concentration 50; molting; monitoring; neonates; rearing; resistance management; transgenic plants; Bangladesh; India;     Show all 23 Subjects
Abstract:
... Eggplant (Solanum melongena Linn.), or brinjal, was engineered to express an insecticidal protein (Cry1Ac) from Bacillus thuringiensis (Bt) and commercialized in Bangladesh on a limited basis in 2014. As part of an insect resistance management strategy, studies were conducted to determine the susceptibility of the targeted insect pest, the eggplant fruit and shoot borer, Leucinodes orbonalis (Guen ...
DOI:
10.3390/insects10070198