Efficacy of the new insecticide thiocyclam hydrogen oxalate in the control of rice striped stem borer Chilo suppressalis (Lepidoptera: Grambidae) under field conditions

Abstract

Due to the long-term use of some chemical insecticides to control rice striped stem borer, Chilo suppressalis in rice fields in the north of Iran and in order to prevent the development of stem borer resistance to them, it is necessary to use new insecticides such as thiocyclam hydrogen oxalate granules 4% (Vibrant®) to control this pest. Experimental treatments in this research include, 1-(VibrantR) granule insecticide 4% at the rate of 10 kg/ha. 2-(VibrantR) granule insecticide at the rate of 12.5 kg/ha. 3-(VibrantR) granule insecticide 4% at the rate of 15 Kg/ha. 4-Diazinon granule insecticide 10% at the rate of 15 kg/ha. 5-Fipronil granule insecticide 0.2% at the rate of 20 kg/ha. 6-Control (only watering). The present study was conducted in the form of randomized complete block design with 3 replications. The following characteristics including: the percentage of dead hearts in the first generation, the percentage of white heads in the second generation, the percentage of insecticide efficiency, the population of larvae and the yield of rice were evaluated. The results of this research showed that among the tested insecticides, (Vibrant®) insecticide in amounts of 12.5 and 15 kg per hectare has significant advantage in controlling the rice stem bore for the first and second generations of the pest, respectively. Also, the results of this study showed that the least contamination of dead hearts (5.22%), white heads (2.33%), the highest larval mortality (86.01%) and the highest yield (4020.83 kg/ha.) was observed in the treatment Vibrant 4% in the amount of 15 kg/ha. Therefore, the findings of the present study indicate that the new thiocyclam hydrogen oxalate insecticide has a good potential in controlling rice striped stem borer and can be used for integrated management of stem borer in paddy field ecosystems.