@article{Ramlan Anjas_Santoso_Nurmansyah_2021, title={Statistik demografi kumbang predator Stethorus punctillum Weise (Coleoptera: Coccinellidae) pada Tetranychus kanzawai Kishida (Acari: Tetranychidae)}, volume={18}, url={https://jurnal.pei-pusat.org/index.php/jei/article/view/583}, DOI={10.5994/jei.18.1.33}, abstractNote={<p><em>Tetranychus kanzawai</em> is a species of mite that can cause agricultural crop losses of about 60–90%. One way to control pests that are environmental friendly is to use the predatory beetle <em>Stethorus</em> <em>punctillum</em>. This study aims to determine the demographic statistics, preferences, and functional response of <em>S.</em> <em>punctillum</em> on <em>T. kanzawai</em>. Observation of the <em>S. punctillum</em> biological using 100 eggs, observations were made of the number of individuals living until adult females produce offspring. Preferences of <em>S.</em> <em>punctillum</em> using 50 eggs and 50 nymphs and <em>T. kanzawai</em> adults, observations were made on the number of  <em>T. kanzawai</em> preyed by instar larvae I, II, III, IV, and <em>S.</em> <em>punctillum</em> adults. Functional response is done by giving <em>S.</em> <em>punctillum</em> prey as many as 30, 40, 50, 60, 70, 80 eggs <em>T. kanzawai</em>, observations made on the remaining number of eggs. <em>S. punctillum</em> eggs last for 7.01 ± 0.72 days. First instar larvae lasted for 4.84 ± 0.51 days, second instar 3.16 ± 0.52 days, third instar 3.00 ± 0.27 days, and IV instar 2.48 ± 0.50 days. Females lay eggs 64.47 ± 2.37 eggs. Gross reproduction rate (GRR) of <em>S. punctillum</em> 64.29 individuals/generation, net reproduction rate (Ro) of 17.18 individuals/female/generation, intrinsic accretion rate (r) of  0.27 individuals/female/day, average the generation period (T) is 62.41 days, and the double time (DT) is 2.51 days. The data shows that <em>S. punctillum</em> has a preference for <em>T. kanzawai</em> egg stages and type III functional response curves with Th 7.68 minutes and a 0.22 eggs/minute.</p>}, number={1}, journal={Jurnal Entomologi Indonesia}, author={Ramlan Anjas, Nirma Septia and Santoso, Sugeng and Nurmansyah, Ali}, year={2021}, month={Jun.}, pages={33} }