TY - JOUR AU - Pinzón-Hamón, Diego Alonso AU - Martínez-Osorio, John Wilson AU - Castro-López, Mayerly Alejandra PY - 2018/09/09 Y2 - 2024/03/28 TI - Parasitism of Trichogramma and predation of Chrysoperla on Compsus viridivittatus eggs, a Vitis vinifera pest, under laboratory conditions JF - Revista Colombiana de Ciencias Hortícolas JA - Rev. Colomb. Cienc. Hortic VL - 12 IS - 2 SE - Fruits section DO - 10.17584/rcch.2018v12i2.7786 UR - https://revistas.uptc.edu.co/index.php/ciencias_horticolas/article/view/7786 SP - 348-357 AB - <p>The parasitic potential of <em>Trichogramma exiguum </em>and <em>Trichogramma pretiosum </em>and the predatory effect of <em>Chrysoperla carnea </em>were evaluated on <em>Compsus viridivittatus </em>eggs, an insect pest in grape fields in Boyaca, Colombia. The <em>T. exiguum </em>and <em>T. pretiosum </em>tests used 240 eggs groups exposed to 0, 15, 30 and 45 parasitoids densities. In the <em>C. carnea </em>test, a second instar larva was placed with prey densities of 80, 160 and 240 <em>C. viridivittatus </em>eggs. A completely randomized design was used under laboratory conditions (18±2°C and 60±5% RH). In the trials with <em>T. exiguum </em>and <em>T. pretiosum</em>, the highest percentages of parasitism were obtained with the 45 parasitoid density (69.4% and 82.5%, respectively). It was established that <em>T. pretiosum </em>was more effective in the parasitism of <em>C. viridivittatus </em>than <em>T. exiguum</em>, resulting in larvae emergence under 13% and parasitism over 70%. The test with <em>C. carnea </em>showed that the highest consumption percentage (85.8%) was obtained with the 80 <em>C. viridivittatus </em>egg density. There was no emergence of parasitoids from the eggs parasitized by <em>T. exiguum </em>and <em>T. pretiosum</em>, probably because of the environmental conditions and/or <em>C. viridivittatus </em>host intrinsic characteristics. The tested entomophagous species showed over 50% <em>C. viridivittatus </em>egg mortality, suggesting that they can be used in future field tests in grape vine crops in order to observe their potential in <em>C. viridivittatus </em>biological control programs in Boyaca.</p> ER -