In Korea, six mealybug species have been reported on pears. This study investigated the occurrence of mealybugs in 19 pear orchards from 2013 to 2014. Two species, Crisicoccus matsumotoi (Siraiwa) (Hemiptera: Pseudococcidae) and Pseudococcus comstocki (Kuwana) were mainly found. The dominant species was C. matsumotoi identified on 73% of infested fruit. Toxicities of 14 registered insecticides (7 single formulations and 7 mixed formulations) commonly used to control P. comstocki were evaluated to C. matsumotoi nymphs and adults at the recommended concentration. As a results, all insecticides exhibited strong insecticidal activity with 100% mortality of both nymphs and adults. These results indicate that the 14 insecticides can be used in control for C. matsumotoi in field.

• Jin-Won Seo(Department of Plant Medicine, Chungbuk National University)
• Won Jin Kang(Department of Plant Medicine, Chungbuk National University)
• Min-Jun Kim(Department of Plant Medicine, Chungbuk National University)
• Jun-Won Park(Department of Plant Medicine, Chungbuk National University)
• Seung-Hwan Yun(Department of Plant Medicine, Chungbuk National University)
• Hyun-Na Koo(Department of Plant Medicine, Chungbuk National University)
• Gil-Hah Kim(Department of Plant Medicine, Chungbuk National University)