02189naa a2200301 a 450000100080000000500110000800800410001910000280006024502050008826000090029352012440030265000230154665000120156965000240158165000100160565000100161565000260162565000130165165300180166465300240168265300100170665300150171665300160173165300090174770000260175670000130178277300920179514857512018-06-06       2002    bl uuuu     u00u1 u    #d1 aFIGUEIREDO, M. de L. C.  aEffect of Telenomus remus Nixon (Hymenopterabscelionidae) density on control of Spodoptera frugiperda (Smith) (Lepidoptera: noctuidae) egg masses upon release in a maize field.h[electronic resource]  c2002  aThe impact of releasing different densities (0, 6, 9 and 12 adult females m-2) of the egg parasitoid Telenomus remus Nixon on maize plants artificially infested with Spodoptera frugiperda (Smith) egg masses (one m-2) was evaluated. Egg masses were pinned in the mid-rib of the plant 36 days after planting. One egg mass contained approximately 65 eggs. The experimental design was in a randomized complete block design with five replications (16 m2 plots). There was a significant effect on percentage of parasitism egg masses. The highest parasitism values were verified in plots where 9 or 12 females of T. remus m-2 were released, respectively, 74 and 88.3 %. The relationship between percentage of parasitized egg masses and parasitoid densities was quadratic (Y = 16.8 + 9.98 X - 0.35 X2, r2 = 0.99). The natural occurrence of Trichogramma spp. was relatively constant over the egg masses fixed on maize plants (52.5%). However, the average T. remus parasitism on the eggs of a mass was much higher, representing 80.4% while the parasitism was only 21.3% in the case of Trichogramma. The presence of both parasitoids was responsible for up to 97.5% of parasitism, obtained from plots with a released density of 12 T. remus female m-2.  abiological control  aInsecta  aControle Biológico  aMilho  aPraga  aSpodoptera Frugiperda  aZea Mays  aFall armyworm  aLagarta-do-cartucho  aMaize  aParasitoid  aParasitoide  aPest1 aDELLA LUCIA, T. M. C.1 aCRUZ, I.  tRevista Brasileira de Milho e Sorgo, Sete Lagoasgv. 1, n. 2, p. 12-19, maio/ago. 2002.