M.M. El Hoseny1, H.F. Dahi2*, A.M. El Shafei1 and M.S. Yones3
Department of Entomology, Faculty of Science, University of Ain Shams, Egypt; (2) Plant Protection Research Institute, ARC, Dokki, Giza, Egypt; (3) National Authority for Remote Sensing and Space Sciences (NARSS), Cairo, Egypt.
*Email address of the corresponding author: [email protected]
Received: 19/4/2023; Accepted: 5/2/2024
The spiny bollworm (SBW), Earias insulana is one of the most serious cotton pests in Egypt and worldwide. The impact of temperature on this insect pest biology was investigated, with a focus on the duration length of the various developmental stages. The rate of development, the lower temperature threshold and the heat unit accumulations needed to complete each life stage (egg, larvae, pupa, pre-oviposition) and generation period of the SBW were determined under laboratory conditions. The insect population, seasonal abundance and field generation forecasting were studied by using remote sensing technique, especially satellite images, to investigate the impact of temperature on insect population growth in the field. Results obtained showed that SBW had four seasonal generations in addition to the overwintering generation for each of the three cotton seasons (2020, 2021 and 2022). The observed peaks and the predicted peaks of generations per season were detected and the predicted peaks were noticed earlier than the observed peaks, as the average deviation days were -3, -7 and -4 days for 2020, 2021 and 2022 cotton seasons, respectively. Earlier prediction of the SBW could be helpful in designing an integrated management program against this pest.
Earias insulana, temperature, thermal requirements, lower temperature threshold, satellite images, prediction.
https://doi.org/10.22268/AJPP-001295