University of Tehran Iranian Journal of Plant Protection Science 2008-4781 54 2 2024 02 20 Investigating on control of tomato fruitworm Helicoverpa armigera (Hbn.) by integrating chemical insecticides and the parasitoid wasp Habrobracon hebetor (Say) in field conditions Investigating on control of tomato fruitworm Helicoverpa armigera (Hbn.) by integrating chemical insecticides and the parasitoid wasp Habrobracon hebetor (Say) in field conditions 301 315 96153 10.22059/ijpps.2024.371559.1007052 FA Ardavan Mardani Department of Plant Protection, Campus of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. Qodratollah Sabahi Department of Plant Protection, Campus of Agriculture and Natural Resources, University of Tehran, Karaj, Iran AZIZ Sheikhigarjan Iranian Institute of Plant Protection, Tehran, Iran Journal Article 2024 01 26 In this study, the efficacy of pyridalyl and chromafenozide insecticides and the parasitoid <em>Habrobracon hebetor</em> alone and in combination with insecticides against the tomato fruitworm <em>Helicoverpa armigera</em> in tomato farms in Fars Province were investigated. Chromafenozide + parasitoid and pyridalyl + parasitoid treatments controlled the pest population better when compared to the application of each insecticide or parasitoid alone, which indicates the increasing effect of insecticide and parasitoid when used together. The highest healthy green fruit yield was observed in pyridalyl treatment, the highest healthy red fruit yield, and the highest total yield was observed in chromafenozide + parasitoid and pyridalyl + parasitoid treatments and the lowest was observed in the control. Also, the lowest amount of damaged green fruit, red damaged fruit, and red rotten tomato was observed in chromafenozide + parasitoid and pyridalyl + parasitoid treatments. The highest amount of damage was observed in the control treatment. In addition, the highest increase in total yield was observed in the treatments of chromafenozide + parasitoid and pyridalyl + parasitoid treatments, and the lowest was observed in the parasitoid alone treatment. The integrated treatments had the highest efficiency, the least damaged fruit, the highest yield, and the highest increase in yield.<strong> </strong>This study showed that pyridalyl and chromafenozide insecticides in combination with <em>H. hebetor</em> are a suitable method for controlling <em>H. armigera</em> in tomato fields. In this study, the efficacy of pyridalyl and chromafenozide insecticides and the parasitoid <em>Habrobracon hebetor</em> alone and in combination with insecticides against the tomato fruitworm <em>Helicoverpa armigera</em> in tomato farms in Fars Province were investigated. Chromafenozide + parasitoid and pyridalyl + parasitoid treatments controlled the pest population better when compared to the application of each insecticide or parasitoid alone, which indicates the increasing effect of insecticide and parasitoid when used together. The highest healthy green fruit yield was observed in pyridalyl treatment, the highest healthy red fruit yield, and the highest total yield was observed in chromafenozide + parasitoid and pyridalyl + parasitoid treatments and the lowest was observed in the control. Also, the lowest amount of damaged green fruit, red damaged fruit, and red rotten tomato was observed in chromafenozide + parasitoid and pyridalyl + parasitoid treatments. The highest amount of damage was observed in the control treatment. In addition, the highest increase in total yield was observed in the treatments of chromafenozide + parasitoid and pyridalyl + parasitoid treatments, and the lowest was observed in the parasitoid alone treatment. The integrated treatments had the highest efficiency, the least damaged fruit, the highest yield, and the highest increase in yield.<strong> </strong>This study showed that pyridalyl and chromafenozide insecticides in combination with <em>H. hebetor</em> are a suitable method for controlling <em>H. armigera</em> in tomato fields. https://ijpps.ut.ac.ir/article_96153_016eb08cec096e657d9f0a426b41cf18.pdf