Premium
Insecticide susceptibility and resistance of Blattella germanica (Blattaria: Blattellidae) in Seoul, Republic of Korea, 2007
Author(s) -
CHANG KyuSik,
JUNG JinSung,
PARK Chan,
LEE HeeIl,
LEE WookGyo,
LEE DongKyu,
SHIN EHyun
Publication year - 2009
Publication title -
entomological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 20
eISSN - 1748-5967
pISSN - 1738-2297
DOI - 10.1111/j.1748-5967.2009.00227.x
Subject(s) - chlorpyrifos , toxicology , biology , fenitrothion , insecticide resistance , pyrethroid , cyhalothrin , pesticide , veterinary medicine , ecology , medicine
The susceptibility of Blattella germanica (L.) in the Republic of Korea (ROK) to insecticides was evaluated under laboratory conditions using 12 insecticides currently used by the local public health centers and/or pest control operators in the ROK. The insecticides included seven pyrethroids and five organophosphates. Based on their LD 50 values, the order of susceptibility of B. germanica adults to the insecticides was chlorpyrifos‐methyl, profenofos and chlorpyrifos with values of 0.07, 0.29 and 0.88 µg/♀, respectively. The least susceptibility was obtained with tetramethrin at LD 50 of 7.39 µg/♀. In the comparative resistance test, the resistance ratios (RR) of 12 insecticides were compared to each other using field‐collected B. germanica adults in Seoul between 1993 and 2007. Blattella germanica demonstrated higher RRs to pyrethroids such as λ‐cyhalothrin, and low RRs among the organophosphates. Among the pyrethroids, λ‐cyhalothrin had the highest RRs of 111‐ and 129‐fold differences at LD 50 and LD 90 values, respectively. Among the organophosphates, profenofos was observed to have the highest RRs of 4‐ and 15‐fold differences at LD 50 and LD 90 values, respectively. However, there were no significant differences in susceptibility to tetramethrin, chlorpyrifos and fenitrothion. Blattella germanica was more susceptible to pyridafenthion showing a 0.7‐fold difference in a resistance ratio (RRLD 50 = LD 50 value of 2007/LD 50 value of 1993). Resistance ratio of tetramethrin was low, but susceptibility was also not high.