Salma Faria Supti
Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh.
Mansura Afroz
Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh.
M. A. Mannan
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh.
Md. Ruhul Amin
Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh.
ABSTRACT: The study was conducted in the rose garden of the Department of Horticulture and Laboratory of the Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh to assess the toxicity of three synthetic and one botanical insecticides namely Confidor 70 WG, Actara 25 WG, Liquor 1.8 EC and neem oil on rose thrips. The highest mean mortality (75.0 ± 1.9%) of thrips was found with Confidor 70 WG. Besides, Confidor 70 WG showed the lowest value of LC50 and LC95 (147.6 and 708.3 ppm, respectively at 6 hours after treatments). The findings revealed that the tested insecticides showed significant differences on the leaf and flower infestation against thrips on rose plants and had promising effect in reducing the infestation level. The level of leaf and flower infestation (6.7 ± 3.8% and 9.7 ± 0.5%, respectively) was found the lowest in Confidor 70 WG treated plot.
Keywords: Insecticides, neem oil, Rosa sp., Rhipiphorothrips cruentatus, mortality, infestation.
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