D3498: Comparison of the regional insecticide resistance of Bemisia tabaci collected from the pepper house in the Republic of Korea

The silverleaf whitefly, Bemisia tabaci, is known to be a polyphagous insect pestthat causes critical damage to over 100 crop species, including peppers, cucumbers,and tomatoes. This insect is also a vector for transmitting various plant viruses, suchas tomato yellow leaf curl virus (TYLCV). Insecticides are the primary method ofcontrol, but their overuse has led to B. tabaci developing resistance. This studymonitored the resistance rate of B. tabaci collected from the pepper house in 15cities in the Republic of Korea: Paju, Hwaseong, Yangpyeong, Yanggu, Pyeongchang,Hoengseong, Dangjin, Cheonan, Gongju, Yecheon, Gumi, Sacheon, Namwon, Naju,and Goheung. The resistance rate of B. tabaci was measured using the leaf dippingmethod against a total of eight insecticides classified by different modes of action.Abamectin-milbemycin, spinosine, METI insecticides, and diamide were the highlyeffective against B. tabaci, while neonicotinoids, sulfoximines, tetramic and tetronicacids, and pyriproxyfen were less effective insecticides. Taken together, theeffectiveness of insecticides against B. tabaci varies depending on the region and theclass of insecticide used.