+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Inheritance, fitness costs, incomplete resistance and feeding preferences in a laboratory-selected MON810-resistant strain of the true armyworm Mythimna unipuncta



Inheritance, fitness costs, incomplete resistance and feeding preferences in a laboratory-selected MON810-resistant strain of the true armyworm Mythimna unipuncta



Pest Management Science 71(12): 1631-1639



The low efficacy of MON810 maize against Mythimna unipuncta represents a scenario of non-compliance with the 'high-dose' strategy, raising concerns about potential resistance development and outbreaks of this secondary pest. The present study offers insight into the different components related to resistance in a laboratory-selected MON810-resistant (MR) strain of M. unipuncta. The resistance in the MR strain is autosomal and inherited as a partially dominant trait. We have found a lack of fitness costs in this strain for essential life history traits, reproductive potential and most of the population growth parameters analysed, the only exception being an increment in the mean generation time. Larvae of the MR strain reared on Bacillus thuringiensis (Bt) maize took longer to develop, presented a high adult cumulative emergence time and had lower growth rate than those reared on non-Bt maize, suggesting the existence of incomplete resistance. Feeding preference assays reveal a low discrimination between Bt and conventional maize. Both resistant and heterozygous larvae of M. unipuncta survive the Cry1Ab toxin expressed on Bt maize, with a weak fitness cost for the homozygous larvae, indicating the potential risk of field-evolved resistance and its relevance to resistance monitoring. © 2015 Society of Chemical Industry.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 058118032

Download citation: RISBibTeXText

PMID: 25565147

DOI: 10.1002/ps.3971


Related references

The Complete Genome Sequence of a Second Distinct Betabaculovirus from the True Armyworm, Mythimna unipuncta. Plos one 12(1): E0170510, 2017

The complete genome sequence of a third distinct baculovirus isolated from the true armyworm, Mythimna unipuncta, contains two copies of the lef-7 gene. Virus Genes 54(2): 297-310, 2018

The complete genome sequence of a second alphabaculovirus from the true armyworm, Mythimna unipuncta: implications for baculovirus phylogeny and host specificity. Virus Genes 55(1): 104-116, 2019

Flights of the armyworm moth, Mythimna Pseudaletia unipuncta Haworth, in the area of Lleida, Spain Vuelos de la defoliadora de maiz, pastos y cespedes, Mythimna Pseudaletia unipuncta Haworth en la zona de Lleida. Boletin de Sanidad Vegetal Plagas 262: 255-259: 2o Trimestre, 2000

Effect of food on feeding consumption and larval development of Mythimna unipuncta Lepidoptera Noctuidae Efeito da alimentacao no consumo alimetar e no desenvolvimento larvar de Mythimna unipuncta Lepidoptera Noctuidae. Suplemento ao Boletim da Sociedade Portuguesa de Entomologia 6: 361-368, 2001

Stability, cross-resistance and fitness costs of resistance to emamectin benzoate in a re-selected field population of the beet armyworm, Spodoptera exigua (Lepidoptera: Noctuidae). Crop Protection 65: 227-231, 2014

Effectiveness of three Bt corn events against feeding damage by the true armyworm (Pseudaletia unipuncta Haworth). Canadian Journal of Plant Science 87(3): 599-603, 2007

Toxicity, inheritance of fenpyroximate resistance, and detoxification-enzyme levels in a laboratory-selected fenpyroximate-resistant strain of Tetranychus urticae Koch (Acari: Tetranychidae). Crop Protection 30(6): 605-610, 2011

Biochemical mechanism and genetics of resistance to lambda-cyhalothrin in the beet armyworm, Spodoptera exigua, and the relative fitness of the resistant strain. Acta Entomologica Sinica ober 15; 46(5): 567-572, 2003

Flights of the armyworm moth, Mythimna (Pseudaletia) unipuncta (Haworth), in the area of Lleida, Spain. Boletin de Sanidad Vegetal, Plagas 26(2): 255-259, 2000

Host location and suitability of the armyworm larvae of Mythimna unipuncta for the tachinid parasitoid Exorista larvarum. BioControl 57(4): 471-479, 2012

Efficacy of Chlorantraniliprole Seed Treatments Against Armyworm (Mythimna unipuncta [Lepidoptera: Noctuidae]) Larvae on Corn (Zea mays). Journal of Economic Entomology 112(1): 188-195, 2019

Inheritance, stability, and lack-of-fitness costs of field-selected resistance to Bacillus thuringiensis in diamondback moth (Lepidoptera: Plutellidae) from Florida. Journal of Economic Entomology 90(3): 732-741, 1997

Report of endoparasitoid wasp, Meteorus gyrator (Thunberg) (Hym.: Braconidae) on rice armyworm, Mythimna unipuncta (Howarth) from Iran. Journal of Entomological Society of Iran 20(2): 101-102, 2001

Fitness costs of Cry1F resistance in laboratory-selected European corn borer (Lepidoptera: Crambidae). Journal of Applied Entomology 135(1-2): 17-24, 2011