Performance of Bt‐susceptible and ‐heterozygous dual‐gene resistant genotypes of Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) in seed blends of non‐Bt and pyramided Bt maize

Abstract Spodoptera frugiperda (J. E. Smith) is one of the major pests of maize in Argentina. The main tool for its control is the use of genetically modified maize hybrids expressing Bacillus thuringiensis (Bt) insecticidal proteins. Maize growers in Argentina initially controlled this pest with Bt maize that expressed a single Bt protein (Cry1Ab or Cry1F). Currently it is necessary to plant maize cultivars that produce two Bt proteins to achieve the satisfactory control. Recently, Cry1F field-evolved resistant populations of this species were confirmed in Argentina. The objective of this study was to evaluate the performance of S. frugiperda field-collected strains on different Bt and non-Bt maize hybrids. Strains were collected from non-Bt maize (T1), Agrisure TDMax (T2), Agrisure Viptera (T3), Agrisure Viptera 3110 (T4), Genuity VT Triple Pro (T5), and Power Core (T6). Three experiments were performed to 1) determine the survivorship and reproduction of field-collected larvae (F0) from Bt maize hybrids, 2) evaluate Cry1F resistance using an F1 screen, and 3) assess the performance of F1 strains on different maize hybrids. In the F0, the survivorship from larva to adult ranged from 0 to 63%. We obtained adults from only the T1, T2, T5, and T6 strains with no significant differences in the reproductive parameters. Continuously rearing F1 larvae on their collected hosts affected larval duration, which was significantly shorter for a known-laboratory Bt-susceptible strain than the field-collected strains. Our results support the existence of Cry1F-resistance alleles in S. frugiperda field populations in Argentina.

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COMPARISON OF EAR DAMAGE CAUSED BY CATERPILLAR PESTS IN TRANSGENIC (BT) MAIZE HYBRIDS AND CONVENTIONAL MAIZE HYBRIDS

Revista Brasileira de Milho e Sorgo ◽

10.18512/rbms2020v19e1099 ◽

2020 ◽

Vol 19 ◽

pp. 17

Author(s):

MARCOS DONISETI MICHELOTTO ◽

WILLIANS CÉSAR CARREGA ◽

AILDSON PEREIRA DUARTE ◽

ROGÉRIO SOARES DE FREITAS

Keyword(s):

Spodoptera Frugiperda ◽

Helicoverpa Zea ◽

Block Design ◽

Great Variability ◽

The State ◽

Bt Maize ◽

Maize Hybrids ◽

Randomized Block Design ◽

Lepidoptera Noctuidae ◽

Cry 1Ab

The use of transgenic (Bt) maize hybrids has been an important tool to minimize ear damages caused by the caterpillar pests Helicoverpa zea and Spodoptera frugiperda (Lepidoptera: Noctuidae). The objective of this work was to evaluate ear damages caused by caterpillar pests in maize hybrids with Bt technologies and in their respective conventional versions (non-Bt) for control of caterpillar pests that attack maize ears in the state of São Paulo, Brazil. Experiments were carried out in four regions of the state, in two summer crops (2009/10 and 2010/11), using a randomized block design with 6x2 factorial arrangements. The first factor was the hybrids and the second factor was the use or not of Bt technology. During harvesting, the percentage of damaged ears was evaluated and damage scores were attributed to a sample of 20 ears per plot. It was found that: (i) YieldGard and Total Liberty (both Cry 1Ab), Herculex (Cry 1F), VTPRO (Cry 1A.105 + Cry2Ab2) and Viptera (VIP3Aa20) technologies, regardless of the hybrid and the season crop, significantly reduce the ear damages and the percentage of damaged ears; (ii) hybrids expressing the Cry 1Ab protein are more damaged by caterpillar pests compared with other technologies; and (iii) there is great variability among hybrids when expressing toxins, even among those hybrids with the same Bt event.

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Efficacy of Bt Maize for Control of Spodoptera frugiperda (Lepidoptera: Noctuidae) in South Africa

Journal of Economic Entomology ◽

10.1093/jee/toz048 ◽

2019 ◽

Vol 112 (3) ◽

pp. 1260-1266 ◽

Cited By ~ 6

Author(s):

A S Botha ◽

Annemie Erasmus ◽

Hannalene du Plessis ◽

Johnnie Van den Berg

Keyword(s):

South Africa ◽

Spodoptera Frugiperda ◽

Bt Maize ◽

Lepidoptera Noctuidae

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Managing fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae), with Bt maize and insecticides in southern Brazil

Pest Management Science ◽

10.1002/ps.4660 ◽

2017 ◽

Vol 73 (12) ◽

pp. 2569-2577 ◽

Cited By ~ 33

Author(s):

Leonardo M Burtet ◽

Oderlei Bernardi ◽

Adriano A Melo ◽

Maiquel P Pes ◽

Thiago T Strahl ◽

...

Keyword(s):

Spodoptera Frugiperda ◽

Fall Armyworm ◽

Southern Brazil ◽

Bt Maize ◽

Lepidoptera Noctuidae

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Susceptibility and Aversion of Spodoptera frugiperda (Lepidoptera: Noctuidae) to Cry1F Bt Maize and Considerations for Insect Resistance Management

Journal of Economic Entomology ◽

10.1603/ec13352 ◽

2014 ◽

Vol 107 (1) ◽

pp. 368-374 ◽

Cited By ~ 15

Author(s):

Rachel R. Binning ◽

Joel Coats ◽

Xiaoxiao Kong ◽

Richard L. Hellmich

Keyword(s):

Insect Resistance ◽

Spodoptera Frugiperda ◽

Resistance Management ◽

Bt Maize ◽

Insect Resistance Management ◽

Lepidoptera Noctuidae

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Antibiosis to Spodoptera frugiperda (Lepidoptera: Noctuidae) in chickpea genotypes

Bulletin of Entomological Research ◽

10.1017/s0007485321000870 ◽

2021 ◽

pp. 1-8

Author(s):

Fernanda Correa ◽

Cinthia Luzia Teixeira Silva ◽

Warley Marcos Nascimento ◽

André Cirilo de Sousa Almeida ◽

Flávio Gonçalves de Jesus

Keyword(s):

Spodoptera Frugiperda ◽

Pupal Stage ◽

Larval Period ◽

Crop Damage ◽

Larval Weight ◽

Breeding Programs ◽

The World ◽

Antibiosis Resistance ◽

Lepidoptera Noctuidae ◽

Resistant Genotypes

Abstract Chickpeas (Cicer arietinum L.) belong to the Fabaceae family and are one of the most grown crops in the world and an important source of protein for humans. Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae) is a polyphagous pest that causes significant crop damage. The objective of this study was to examine antibiosis to S. frugiperda in chickpea genotypes. The following genotypes were studied: Jamu 96 and Blanco Sinaloa 92 (Mexico); Nacional 29 (Cuba); BG 1392 (Spain), and BRS Kalifa, BRS Cristalino, BRS Toro, Nacional 27, 004UP, 003UP, BRS Cícero, and BRS Aleppo (Brazil). The chickpea genotypes influenced the biological parameters of S. frugiperda, of which larval period, larval weight, and pupal period were most affected. Nacional 29 caused high mortality in the larval and pupal stages of S. frugiperda. The larvae on BRS Aleppo had the longest larval stage, lowest weight, and longest pupal stage. The genotypes Nacional 29, Nacional 27, and BRS Cícero showed antibiosis resistance to S. frugiperda. These genotypes could be used as a source of resistance to S. frugiperda in conjunction with other methods of pest control in integrated pest management programs for chickpea crops. These resistant genotypes could also be used as donor sources in breeding programs for insect resistance.

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