TY - JOUR AU - Medina Gaud, Silverio PY - 1959/10/01 Y2 - 2024/03/29 TI - Control of Greenhouse Thrips Heliothrips Haemorrhoidalis (Bouché), with Systemic Insecticides JF - The Journal of Agriculture of the University of Puerto Rico JA - JAUPR VL - 43 IS - 4 SE - Articles DO - 10.46429/jaupr.v43i4.12572 UR - https://revistas.upr.edu/index.php/jaupr/article/view/12572 SP - 291-294 AB - The greenhouse thrips, <em>Heliothrips haemorrhoidalis</em> (Bouché) is one of the most common and injurious insect pest of many plants in Puerto Rico. This is specially true during dry seasons and under special ecological conditions. Three new host plants were added to the existing list and the insect is briefly described. Four systemic insecticides were tested namely: Thimet, Systox, Bayer 23129, and Bayer 19639. Using three concentration levels of each chemical perfect control of the thrips was obtained for a period of 2 months, with exception of Bayer 23129 (1-800) which permitted reinfestation at the end of 1 month. ER -