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<p>The study was conducted at the research farm in Kafr Saqr District, Sharkia Governorate, Egypt, during the 2023–2024 and 2024–2025 growing seasons to investigate the seasonal abundance of insect pests and their associated predators on cabbage. Insects were sampled weekly using a&#xa0;sweep net. A&#xa0;total of ten pest species were recorded: <i>Pieris brassicae</i>&#xa0;(L.), <i>Pieris rapae</i>&#xa0;(L.)<i>, Plutella xylostella</i>&#xa0;(L.), <i>Spodoptera littoralis</i> Spodli, <i>Nezara viridula</i>&#xa0;(L.), <i>Empoasca decipiens </i>(Paoli), <i>Empoasca lybica</i> Deg., <i>Brevicoryne brassicae</i>&#xa0;L., <i>Myzus persicae</i>(Sulzer) and <i>Bemisia tabaci</i> (genn). Seven predatory species were identified, including four coccinellids (<i>Coccinella undecimpunctata</i>&#xa0;L., <i>Cydonia vicina isis</i> Muls, <i>C.&#xa0;vicina nilotica</i> Muls and <i>Scymnus syriacus</i> Marseul), as well as <i>Chrysoperla carnea</i> Stephens, <i>Metasyrphus corollae</i> Fabricius and <i>Paederus alfierii</i> Koch. <i>Chrysoperla carnea</i> was the dominant predator, accounting for 17.22% and 10.29% of the total predator population during the 2023–2024 and 2024–2025 seasons, respectively, followed by <i>C.&#xa0;undecimpunctata</i>. Predator populations generally peaked between December and February. Distinct seasonal patterns were observed for both pests and predators, with synchronized population peaks indicating strong ecological interactions. Conservation of key natural enemies particularly <i>Ch. carnea</i> and <i>C.&#xa0;undecimpunctata</i> may enhance biological control efficiency, reduce reliance on chemical insecticides, and promote sustainable cabbage production.</p>

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Seasonal Occurrence of Insect Pests and Predators on Cabbage Plants in Egypt

  • 期刊论文

  • 发表日期：

    2026年2月13日

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  • Ahmed Amin Ahmed Saleh,
  • Ahmed Shmhi Jabbar,
  • Said Abdel Fattah Mahmoud Amer,
  • Mohamed Abdallah Abdelkader,
  • Mohamed Farag Mahmoud Zawrah

摘要

The study was conducted at the research farm in Kafr Saqr District, Sharkia Governorate, Egypt, during the 2023–2024 and 2024–2025 growing seasons to investigate the seasonal abundance of insect pests and their associated predators on cabbage. Insects were sampled weekly using a sweep net. A total of ten pest species were recorded: Pieris brassicae (L.), Pieris rapae (L.), Plutella xylostella (L.), Spodoptera littoralis Spodli, Nezara viridula (L.), Empoasca decipiens (Paoli), Empoasca lybica Deg., Brevicoryne brassicae L., Myzus persicae(Sulzer) and Bemisia tabaci (genn). Seven predatory species were identified, including four coccinellids (Coccinella undecimpunctata L., Cydonia vicina isis Muls, C. vicina nilotica Muls and Scymnus syriacus Marseul), as well as Chrysoperla carnea Stephens, Metasyrphus corollae Fabricius and Paederus alfierii Koch. Chrysoperla carnea was the dominant predator, accounting for 17.22% and 10.29% of the total predator population during the 2023–2024 and 2024–2025 seasons, respectively, followed by C. undecimpunctata. Predator populations generally peaked between December and February. Distinct seasonal patterns were observed for both pests and predators, with synchronized population peaks indicating strong ecological interactions. Conservation of key natural enemies particularly Ch. carnea and C. undecimpunctata may enhance biological control efficiency, reduce reliance on chemical insecticides, and promote sustainable cabbage production.