Biology of Sitotroga cerealella (Oliv.) (Lepidoptera: Gelechiidae) reared on five corn (maize) genotypes
ABSTRACT Laboratory experiments under controlled conditions of 30 ± 1 °C, 60 ± 10% r.h. and 14 h photophase were performed to study the biology of Sitotroga cerealella (Oliv.) reared on five natural diets of different corn (maize) genotypes. S. cerealella reared on the shrunken2 genotype displayed the longest developmental time (43.5 d) and the lowest fecundity (85.2 eggs/female). Although the egg to adult developmental time (40.2 d) of S. cerealella reared on sugary-opaco2 did not differ significantly from those on normal, opaco2 and sugary, the survival of the pre-imaginal stage (42.2%) was significantly reduced on this genotype. Significant differences were not found between the number of eggs hatched from females reared on these genotypes. The egg hatch ranged from 86.8 to 95.3% for the shrunken2 and opaco2 genotypes, respectively. Further rearing studies to determine the effects of these genotypes on the biology of S. cerealella are needed, since significant differences were not observed in the data from two successive generations.
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- "The Angoumois Grain Moth, Sitotroga cerealella Olivier (Lepidoptera: Gelechiidae), has been considered a major pest of stored agricultural products worldwide. The larvae of S. cerealella attack both in field or/and in storeroom a variety of kernels, including corn (Cônsoli and Filho 1995; Weston and Rattlingourd 1999; Ahmed and Raza 2010). The preference of insects for a plant or specific plant parts results from different compounds produced by plants (Bernays and Chapman 1994). "
ABSTRACT: The flight behavioral responses of males and females of Sitotroga cerealella (Lepidoptera: Gelechiidae) to corn kernel volatiles, in a wind tunnel, and the determination and identification of the active compounds of corn kernel volatiles were investigated. A wind tunnel bioassay was carried out to test the response of males and females to 15, 30, 60, and 120 g equivalents of corn kernel volatiles. Gas chromatography-electroantennography was used to determine which components in corn kernel volatiles elicited an EAD response using male and female antennae. Gas chromatography-mass spectrometry technique was used to identify the active compounds of corn kernel volatiles. A 60-g equivalent of corn kernel volatiles elicited attractant behavior of unmated males to landing near the source. Mated males and virgin females were not attracted to corn kernel volatiles. The number of mated females landing was significantly higher in 60- and 120-g equivalents of corn kernel volatiles, compared to the other concentrations and the control. The antennae of males and females responded to four active compounds of corn kernel volatiles. Three of these compounds were identified, namely nonanal, decanal, and geranyl acetone. It is suggested that host finding and selection by S. cerealella is associated with its host volatiles.Arthropod-Plant Interactions 12/2013; 7(6). DOI:10.1007/s11829-013-9275-y · 1.46 Impact Factor
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- "(Yadav et al., 2003), but fecundity tended to be higher (137e165), with the exception of only 85 eggs laid on one genotype, on different genotypes of corn stored at 27 C and 50% r.h. (Consoli and Amaral- Filho, 1995). Shazali and Smith (1985) also reported higher fecundity on sorghum stored at 20e30 C, with 119e136, 131e165, and 144e178 eggs laid at 40%, 60, and 80% r.h., respectively, and 80e121 eggs laid at 35 C at these same relative humidities. "
ABSTRACT: a b s t r a c t The Angoumois grain moth, Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae), is a pest of stored corn, Zea mays L., and other grains throughout the world. Sitotroga cerealella are routinely exposed to temperatures below 20 C in regions of the U.S. where corn is grown, yet there are no data describing adult life history parameters below 20 C. We determined longevity, fecundity, and survivorship of eggs at a range of temperatures that represent environmental conditions to which S. cerealella are exposed in corn stored in the U.S.Journal of Stored Products Research 10/2013; 55(2013):128-133. DOI:10.1016/j.jspr.2013.10.003 · 1.68 Impact Factor
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ABSTRACT: The biology of indian meal moth and maize weevil on the trehalose gene introduced rice (var 'Nakdong') (T-Nakdong) was compared to that on the rice without gene introduction (Nakdong) at . Development of the both two insects was significantly delayed; on T-Nakdong, the developmental periods of female moth and weevil were , respectively. Whereas those on Nakdong were , respectively. Net reproduction rate of Indian meal moth on T-Nakdong was significantly lower than that on Nakdong , due to the lower emergence rate . The life table statistics of maize weevil on T-Nakdong was estimated to be similar to those on Nakdong. The delayed development of T-Nakdong suggested that the factor for development of the insects could be changed by the introduction of trehalose gene into the rice variety.03/2008; 47(1). DOI:10.5656/KSAE.2008.47.1.023