Oriental fruit moth, Grapholita molesta (Busck) (Lepidoptera: Tortricidae), is an important pest for both stone and pomefruits. In a previous study, we selected four best plant extracts [Nicotiana tabacum L., Allium sativum L., Zanthoxylumpiperitum (L.) DC., and Sapindus mukorossi Gaertn.] against first instar larva, and here we evaluated them against adultstage (<5 d old) in laboratory. N. tabacum applied at 2 mg/ml showed highest corrected mortality of 85 and 100% infemale and male, respectively, within 168 h of exposure. Combined spray of N. tabacum and A. sativum showed LT50of 103.5 and 63.9 h on female and male, respectively. We also evaluated the deterrent effect of the plant extracts onovipositioning, and found that female laid less egg (29) on N. tabacum treated twigs at the concentration of 4 mg/twig.Thus N. tabacum can be a potential botanical insecticide against G. molesta.

• Souvic Sarker(Department of Plant Medicals, Andong National University, Andong, Republic of Korea)
• Naresh Dangi(Department of Plant Medicals, Andong National University, Andong, Republic of Korea)
• Young Ha Woo(Department of Plant Medicals, Andong National University, Andong, Republic of Korea)
• Un Taek Lim(Department of Plant Medicals, Andong National University, Andong, Republic of Korea)