RESUMOO objetivo deste trabalho foi estudar os aspectos biológicos de Spodoptera frugiperda (J. E. Smith) e elaborar a tabela de vida de fertilidade deste inseto em cinco linhagens de milho provenientes do Programa de Melhoramento de Milho da Embrapa Clima Temperado. Foram determinadas a duração e sobrevivência das fases de ovo, larva, pré-pupa e pupa, peso de pupas, deformações, longevidade, fecundidade e período de pré-oviposição. A linhagem M89611 não permitiu aos insetos realizarem postura. A duração do período de lagarta, pré-pupa, pupa e adultos foram de 10,67, 1,22, 2,13 e 21,33 dias, respectivamente. O peso de pupa para esta linhagem foi de 0,129 e 0,091g para fêmeas e machos, respectivamente. As deformações foram de 25% e a longevidade de 21,3 dias. S. frugiperda aumentou 20,22 vezes a cada geração para a linhagem M89420, com duração média de 37,26 dias e a razão finita de aumento foi de 1,06668. A linhagem M89611 afeta a biologia de S. frugiperda, enquanto que, a linhagem M89287 proporciona maior viabilidade das fases de desenvolvimento e a linhagem M89420 proporciona a maior taxa líquida de reprodução.PALAVRAS-CHAVE: Noctuidae, lagarta-do-cartucho, resistência, inseto-praga. ABSTRACT BIOLOGY AND FERTITLITY LIFE TABLE OF SPODOPTERA FRUGIPERDA (J.E. SMITH) IN STRAINS OF CORN.The aim of this work was to study the biology of Spodoptera frugiperda (J. E. Smith) and to elaborate the fertility life table of the insect in five strains of corn from the Programa de Melhoramento de Milho da Embrapa Clima Temperado, in Brazil. The following variables were determined: duration and survival of the egg, larval, pre-pupal and pupal phases, pupal weight, deformation, longevity, fecundity and duration of pre-oviposition. The strain M89611 did not allow the insects to lay eggs. The duration of the periods of larvae, pre-pupae, pupae and adults was 10.67, 1.22, 2.13 and 21.33 days, respectively. The pupal weight for this strain was 0.129 and 0.091 g for females and males, respectively. The deformations were 25%, and the longevity was 21.3 days. S. frugiperda increased 20.22 times in each generation for the M89420 strain, with an average of 37.26 days, and the finite rate of increase was 1.06668. The strain M89611 affected the biology of S. frugiperda, whereas the strain M89287 provided greater viability of the development stages, while strain M89420 provided the highest net reproductive rates.

The potato a crop is attacked by many pests, among which the Diabrotica speciosa (Coleoptera: Chrysomelidae) is considered the main one. Because of chemical control failures associated with the requirements of integrated potato production (IPP) requiring sustainable measures, aimed to characterize advanced clones breeding program of Embrapa for resistance to insect infestation in artificial conditions. Tests were performed in a greenhouse without choice of plants and tubers of four clones of Embrapa (C2337-06-02, C2337-18-02, C2342-1-02, C2362-02-02), a standard-resistant clone (NYL 235-4) and a susceptible standard cultivar (Asterix). Results of susceptibility of 'Asterix' and resistance of 'NYL 235-4' and 'C2342-1-02', both in shoots and in tubers, predominated. Thus indicating a typical behavior of tolerance of 'NYL 235-4' and 'C2337-06-02' to insect attack, both in the shoots and in the tubers. Clones C2337-06-02 and C2362-02-02 which expressed resistance to the attack of the young stage of the insect in the tubers. Three potato genotypes derived from the wild species Solanum berthaultii (NYL 235-4, C2337-06-02, C2362-02-02) even under infestation of D. speciosa, showed agronomic traits determinants of greater commercial acceptance of tubers such as maintaining productivity, elongated, skin smoothness and shallower depth of the eye (vegetative bud).