Morphology, Damage Symptoms and Biology of Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) Strains in Egypt | ||||
| Egyptian Academic Journal of Biological Sciences. A, Entomology | ||||
| Volume 17, Issue 4, December 2024, Page 17-26 PDF (814.55 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsa.2024.389023 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Kreema A. EL-Lebody; Rabab D.A. Allam; Amira M. Rashad | ||||
| Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| Fall armyworm (FAW) Spodoptera frugiperda (J.E. Smith) is a destructive pest of corn. FAW invaded Egypt in May 2019 and was recorded for the first time in corn plantations in Kom Ombo - Aswan Governorate. Recently S. frugiperda C-strain was Confirmed in Nile corn plantation in Meet AL - Deeba village, (Qillin-Kafr El-Sheikh); while R-strain was confirmed in summer corn plantations of Abo Al- Gadeil, (Qillin-Kafr El-Sheikh) during corn season 2022. Moreover, The R strain of S. frugiperda infested corn plants beside uninfected neighbourhood rice fields. This observation indicated that, R- strain of S. frugiperda preferred summer corn plants as a host than rice. Recent evidence of both strains collected from corn fields of Kafer EL Sheikh were identical morphologically and cause same damage symptoms.Biology of S. frugiperda C-strain and R-Strain were studied under natural conditions of field crop pests’ laboratory at Plant Protection Research Institute Dokki, Giza, Egypt during Autumn and summer season (2022). C-strain larvae of S. frugiperda were fed on castor oil leaves. The average duration of life cycle and generation time at 23.0±2.0°c was 39.0±2.0 and 44.1±1.6 days, respectively. The corresponding averages for S. frugiperda R- strain corn - feed through early 3 instars at 28.0±2.0°c were 27.0±0. 5 and 29.0±0.6 days, respectively. The average of pre-oviposition periods {3.5±0.7 and 2.6±0.2 days} included the pre-mating period of 2.80 ±0.56 and 1±0.03 days for S. frugiperda C-strain and R- strain, respectively. The S. frugiperda C- strain virgin females deposited infertile eggs when the pre-mating period increased more than 4 days at 26.0±2.0°c and 75.0±5.0 RH. These results are important for planning effective integrated control against fall armyworm to prevent it,s rapid spread in Egypt. | ||||
| Keywords | ||||
| Spodoptera frugiperda; morphology; damage symptoms; biology | ||||
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