Journal of Applied Entomologist https://dzarc.com/entomology <p><strong>Journal of Applied Entomologist</strong> is open access, refereed, or peer-reviewed research journal, this journal invites you to publish research articles that have a significant impact on science and academic group. This entomology journal's main focus is on critical and creative research and provides a completely open-access research journal platform for scholars and researchers to share their research and findings among practitioners around the globe.</p> en-US dzarc.ento@gmail.com (Dzarc Publications (Mamta Kamlashankar Mishra)) sarwanent@pau.edu (Dr. Sarwan Kumar) Wed, 12 Jun 2024 17:56:01 +0000 OJS 3.3.0.10 http://blogs.law.harvard.edu/tech/rss 60 Impact of ecological conditions on population dynamic of Phenacoccus solenopsis Tinsley and associated predators in sweet potato fields ELBeheira Governorate, Egypt https://dzarc.com/entomology/article/view/522 <p>The mealy bug, <em>Phenacoccus solenopsis</em> and the two spotted spider mite, <em>Tetranychus urticae</em> are a highly polyphagous sap sucking pests, without a hibernation period, as both are active all the year round. They are destructive pests of important vegetables and field crops. The present study was carried out at Rasheed region, Beheira Governorate during 2021 and 2022 seasons, to monitor the population fluctuations of mealybug and its predators; <em>Coccinella undecimpunctata</em> L., <em>Chrysoperla carnea </em>Steph<em>, Scymnus </em>spp<em>.</em> and<em> Hippodamia tredecimpunctata</em> in the first season, the infestation of <em>P. solenopsis</em> started on sweet potato plants at low numbers, the population increased gradually to reach its highest peak during 30<sup>th</sup> July (115.00 individual). This peak was followed by a relatively high population of the three predators, <em>C. undecimpunctata</em> (4.00 individual), <em>Ch. carnea </em>(8.00 individ.)<em>, Scymnus sp.</em> (3.00 individ.) and <em>H. tredecimpunctata</em> (2.25 individ.). The second peak of the pest was detected on 21<sup>st</sup> Aug<em>.</em> (259.05 individual), synchronized with the peaks of the four, predators. During 2022, the first incidence of the mealybug was recorded on 30<sup>th</sup> July (114.97individ.). This peak was associated with the peaks of the four predators. The second peak of <em>P. solenopsis</em> was observed on 28<sup>th</sup> Aug<em>.</em> (196.50 individ.), it coincided with the peaks of the four predators. The infestation of<em> P. solenopsis</em> and <em>T. urticae</em> and their predators were highly significantly correlated with weather factors (Min.°c. and RH).</p> Elsayed A. Refaei, El-sarand E. A., Neveen E. El-Metwaly, Abd El-Salam A. Farag, Ekram A. Abdou, Ismael M. M. Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0 https://dzarc.com/entomology/article/view/522 Fri, 05 Apr 2024 00:00:00 +0000