Santos-Amaya, Oscar F Tavares, Clébson S Rodrigues, João Victor C Campos, Silverio O Guedes, Raul Narciso C Alves, Analiza P and Pereira, Eliseu José G 2017. Fitness costs and stability of Cry1Fa resistance in Brazilian populations of Spodoptera frugiperda. Pest Management Science, Vol. 73, Issue. 1, p. 35.
Bernardi, Oderlei Bernardi, Daniel Horikoshi, Renato J Okuma, Daniela M Miraldo, Leonardo L Fatoretto, Julio Medeiros, Fernanda CL Burd, Tony and Omoto, Celso 2017. Selection and characterization of resistance to the Vip3Aa20 protein fromBacillus thuringiensisinSpodoptera frugiperda. Pest Management Science, Vol. 72, Issue. 9, p. 1794.
Chakroun, Maissa Banyuls, Núria Walsh, Tom Downes, Sharon James, Bill and Ferré, Juan 2017. Characterization of the resistance to Vip3Aa in Helicoverpa armigera from Australia and the role of midgut processing and receptor binding. Scientific Reports, Vol. 6, p. 24311.
Da Silva, Karen F Spencer, Terence A Camargo Gil, Carolina Siegfried, Blair D and Walters, Frederick S 2017. Impact ofSpodoptera frugiperdaneonate pretreatment conditions on Vip3Aa19 insecticidal protein activity and laboratory bioassay variation. Pest Management Science, Vol. 72, Issue. 4, p. 837.
Garcia, Adriano G. Ferreira, Cláudia P. Cônsoli, Fernando L. and Godoy, Wesley A.C. 2017. Predicting evolution of insect resistance to transgenic crops in within-field refuge configurations, based on larval movement. Ecological Complexity, Vol. 28, p. 94.
Horikoshi, Renato J. Bernardi, Daniel Bernardi, Oderlei Malaquias, José B. Okuma, Daniela M. Miraldo, Leonardo L. Amaral, Fernando S. de A. e and Omoto, Celso 2017. Effective dominance of resistance of Spodoptera frugiperda to Bt maize and cotton varieties: implications for resistance management. Scientific Reports, Vol. 6, p. 34864.
Huang, Fangneng Qureshi, Jawwad A. Head, Graham P. Price, Paula A. Levy, Ronnie Yang, Fei and Niu, Ying 2017. Frequency of Bacillus thuringiensis Cry1A.105 resistance alleles in field populations of the fall armyworm, Spodoptera frugiperda, in Louisiana and Florida. Crop Protection, Vol. 83, p. 83.
Leite, Natália A. Mendes, Simone M. Santos-Amaya, Oscar F. Santos, Chritiane A. Teixeira, Thaís P. M. Guedes, Raul N. C. and Pereira, Eliseu J. G. 2017. Rapid selection and characterization of Cry1F resistance in a Brazilian strain of fall armyworm. Entomologia Experimentalis et Applicata, Vol. 158, Issue. 3, p. 236.
Nagoshi, R. N. and Meagher, R. L. 2017. Using intron sequence comparisons in thetriose-phosphate isomerasegene to study the divergence of the fall armyworm host strains. Insect Molecular Biology, Vol. 25, Issue. 3, p. 324.
Niu, Ying Qureshi, Jawwad A. Ni, Xinzhi Head, Graham P. Price, Paula A. Meagher, Robert L. Kerns, David Levy, Ronnie Yang, Xiangbing and Huang, Fangneng 2017. F2 screen for resistance to Bacillus thuringiensis Cry2Ab2-maize in field populations of Spodoptera frugiperda (Lepidoptera: Noctuidae) from the southern United States. Journal of Invertebrate Pathology, Vol. 138, p. 66.
Santos-Amaya, Oscar F. Tavares, Clébson S. Monteiro, Hugo M. Teixeira, Thaís P.M. Guedes, Raul N.C. Alves, Analiza P. and Pereira, Eliseu J.G. 2017. Genetic basis of Cry1F resistance in two Brazilian populations of fall armyworm, Spodoptera frugiperda. Crop Protection, Vol. 81, p. 154.
Silva, Karen F. Da Spencer, Terence A. Crespo, Andre L. B. and Siegfried, Blair D. 2017. Susceptibility of Spodoptera frugiperda (Lepidoptera: Noctuidae) Field Populations to the Cry1F Bacillus thuringiensis Insecticidal Protein. Florida Entomologist, Vol. 99, Issue. 4, p. 629.
Vélez, Ana M Vellichirammal, Neetha Nanoth Jurat-Fuentes, Juan Luis and Siegfried, Blair D 2017. Cry1F resistance among lepidopteran pests: a model for improved resistance management?. Current Opinion in Insect Science, Vol. 15, p. 116.
Vélez, Ana María Alves, Analiza P. Blankenship, Erin E. and Siegfried, Blair D. 2017. Effect of Cry1F maize on the behavior of susceptible and resistantSpodoptera frugiperdaandOstrinia nubilalis. Entomologia Experimentalis et Applicata, Vol. 159, Issue. 1, p. 37.
Yang, Guoqing Niu, Ying Head, Graham P. Price, Paula A. and Huang, Fangneng 2017. Performance of Cry1Ab-susceptible and -heterozygous resistant populations of sugarcane borer in sequential feedings on non-Bt and Bt maize plant tissue. Entomologia Experimentalis et Applicata,
Bernardi, Oderlei Bernardi, Daniel Amado, Douglas Sousa, Renan S. Fatoretto, Julio Medeiros, Fernanda C. L. Conville, Jared Burd, Tony and Omoto, Celso 2017. Resistance Risk Assessment ofSpodoptera frugiperda(Lepidoptera: Noctuidae) andDiatraea saccharalis(Lepidoptera: Crambidae) to Vip3Aa20 Insecticidal Protein Expressed in Corn. Journal of Economic Entomology, Vol. 108, Issue. 6, p. 2711.
Bernardi, Daniel Salmeron, Eloisa Horikoshi, Renato Jun Bernardi, Oderlei Dourado, Patrick Marques Carvalho, Renato Assis Martinelli, Samuel Head, Graham P. Omoto, Celso and Jurat-Fuentes, Juan Luis 2017. Cross-Resistance between Cry1 Proteins in Fall Armyworm (Spodoptera frugiperda) May Affect the Durability of Current Pyramided Bt Maize Hybrids in Brazil. PLOS ONE, Vol. 10, Issue. 10, p. e0140130.
Huang, Fangneng Chen, Mao Gowda, Anilkumar Clark, Thomas L. McNulty, Brain C. Yang, Fei and Niu, Ying 2017. Identification, inheritance, and fitness costs of Cry2Ab2 resistance in a field-derived population of sugarcane borer, Diatraea saccharalis (F.) (Lepidoptera: Crambidae). Journal of Invertebrate Pathology, Vol. 130, p. 116.
Qiu, Lin Hou, Leilei Zhang, Boyao Liu, Lang Li, Bo Deng, Pan Ma, Weihua Wang, Xiaoping Fabrick, Jeffrey A. Chen, Lizhen and Lei, Chaoliang 2017. Cadherin is involved in the action of Bacillus thuringiensis toxins Cry1Ac and Cry2Aa in the beet armyworm, Spodoptera exigua. Journal of Invertebrate Pathology, Vol. 127, p. 47.
Santos-Amaya, Oscar F. Rodrigues, João V. C. Souza, Thadeu C. Tavares, Clébson S. Campos, Silverio O. Guedes, Raul N.C. and Pereira, Eliseu J.G. 2017. Resistance to dual-gene Bt maize in Spodoptera frugiperda: selection, inheritance, and cross-resistance to other transgenic events. Scientific Reports, Vol. 5, p. 18243.
Transgenic maize, Zea maize L., expressing the Cry1F protein from Bacillus thuringiensis has been registered for Spodoptera frugiperda (J. E. Smith) control since 2003. Unexpected damage to Cry1F maize was reported in 2006 in Puerto Rico and Cry1F resistance in S. frugiperda was documented. The inheritance of Cry1F resistance was characterized in a S. frugiperda resistant strain originating from Puerto Rico, which displayed >289-fold resistance to purified Cry1F. Concentration–response bioassays of reciprocal crosses of resistant and susceptible parental populations indicated that resistance is recessive and autosomal. Bioassays of the backcross of the F1 generation crossed with the resistant parental strain suggest that a single locus is responsible for resistance. In addition, cross-resistance to Cry1Aa, Cry1Ab, Cry1Ac, Cry1Ba, Cry2Aa and Vip3Aa was assessed in the Cry1F-resistant strain. There was no significant cross-resistance to Cry1Aa, Cry1Ba and Cry2Aa, although only limited effects were observed in the susceptible strain. Vip3Aa was highly effective against susceptible and resistant insects indicating no cross-resistance with Cry1F. In contrast, low levels of cross-resistance were observed for both Cry1Ab and Cry1Ac. Because the resistance is recessive and conferred by a single locus, an F1 screening assay was used to measure the frequency of Cry1F-resistant alleles from populations of Florida and Texas in 2010 and 2011. A total frequency of resistant alleles of 0.13 and 0.02 was found for Florida and Texas populations, respectively, indicating resistant alleles could be found in US populations, although there have been no reports of reduced efficacy of Cry1F-expressing plants.
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