title: Prospecting of popcorn hybrids for resistance to fall armyworm.
abstract: The fall armyworm, Spodoptera frugiperda, is the pest that causes the greatest economic losses for both common corn and popcorn crops, and the use of resistant plant genotypes is an important tool for integrated pest management. The goal of the present study was to evaluate the damage caused by S. frugiperda on single-cross popcorn hybrids under field conditions with natural infestation as well as to study the effect of 11 popcorn hybrids on the S. frugiperda life cycle under laboratory conditions. A completely randomized block design with 4 replicates was used for the field experiment, and a completely randomized design with 10 replicates was used for the laboratory experiment. In the field experiment, the damage caused by fall armyworm, grain yield, and popping expansion were quantified, and a diallel analysis was performed to select the best hybrids. For the laboratory experiment, caterpillars were obtained from laboratory cultures kept on an artificial diet and were fed with leaves from the 11 hybrids. Hybrids P7.0 x P9.4, P7.1 x P9.6, P7.2.0 x P9.3, P7.4.0 x P9.1 and P7.4.1 x P9.4 exhibited negative specific combining ability for injury by fall armyworm and positive specific combining ability for yield and popping expansion. In the laboratory experiment, the hybrids influenced the mean larval stage duration, mean larval mass, final larval mass, pupal stage duration, mean pupal mass, and adult longevity.
authors.affiliation: Departamento de Agronomia, Centro de Ciências Agrárias, Universidade Estadual de Maringá, Maringá, PR, Brasil.
authors.forename: N C S
authors.initials: NC
authors.lastname: Crubelati-Mulati
authors.affiliation: Departamento de Agronomia, Centro de Ciências Agrárias, Universidade Estadual de Maringá, Maringá, PR, Brasil.
authors.forename: C A
authors.initials: CA
authors.lastname: Scapim
authors.affiliation: Departamento de Agronomia, Centro de Ciências Agrárias, Universidade Estadual de Maringá, Maringá, PR, Brasil.
authors.forename: F A
authors.initials: FA
authors.lastname: Albuquerque
authors.affiliation: Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil amaraljr@pq.cnpq.br.
authors.forename: A T
authors.initials: AT
authors.lastname: Amaral Junior
authors.affiliation: Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.
authors.forename: M
authors.initials: M
authors.lastname: Vivas
authors.affiliation: Departamento de Agronomia, Centro de Ciências Agrárias, Universidade Estadual de Maringá, Maringá, PR, Brasil.
authors.forename: M A
authors.initials: MA
authors.lastname: Rodovalho
mesh_terms: D000818:Animals; D018533:Biomass; D003433:Crosses, Genetic; D060467:Disease Resistance / Q000235:genetics*; D005260:Female; D006790:Host-Parasite Interactions; D006823:Hybrid Vigor / Q000235:genetics; D006824:Hybridization, Genetic; D007814:Larva / Q000254:growth & development / Q000502:physiology; D008018:Life Cycle Stages; D008297:Male; D010572:Pest Control, Biological / Q000379:methods; D010935:Plant Diseases / Q000235:genetics* / Q000469:parasitology; D018515:Plant Leaves / Q000235:genetics / Q000378:metabolism / Q000469:parasitology; D011679:Pupa / Q000254:growth & development / Q000502:physiology; D015203:Reproducibility of Results; D018411:Spodoptera / Q000254:growth & development* / Q000502:physiology; D003313:Zea mays / Q000235:genetics* / Q000378:metabolism / Q000469:parasitology