1Department of Plant Protection, Faculty of Agriculture, Beni-Suef University, Egypt
2Plant Protection Dept., Fac. of Agric., Al-Azhar Univ., Nasr City, Cairo, Egypt
3Department of Scale Insects and Mealy Bugs, Plant Protection Research Institute, Agricultural Research Center A.R.C., 12511Giza, Egypt
*Email: wael.elzaher@agr.bsu.edu.eg (corresponding author)
Online Published on 17 December, 2025.
Thrips tabaci Lindeman (onion thrips) have become a serious pest threatening onion cultivation. The present study investigated the impact of three planting dates on T. tabaci incidence on onion (Giza 20 variety) for two years (2021-22 and 2022-23). The findings revealed that the T. tabaci recorded 4 peaks in the 1st planting date, the 2nd with an average population density (677.21 and 703.24 individual/plant), followed by the 2nd with 500.05 and 602.13 insects. While the 3th planting date recorded three peaks (385.77 and 494.04 individual/plant). The interaction between plant age, natural enemies, climatic conditions and T. tabaci population density resulted in a strong relationship affecting onion yield.
Thrips Tabaci, Onion, Natural Enemies, Population Dynamics, Plant Age, Wheather Factors, Planting Dates, Correlation Coefficients, Temprature, Relative Humidity, Predators
