[Toxicity of alpha-terthienyl to the larvae of Aedes albopictus].
OBJECTIVE
To investigate the toxicity of alpha-terthienyl to the larvae of Aedes albopictus, its influencing factors and effect on the larva development.


METHODS
Under experimental ultraviolet-A (UVA), the number of dead,pupal or eclosive mosquito larvae was determined on the condition of different doses of alpha-terthienyl and different disposal time in the dark; the number of dead larvae was also determined under sunlight on the condition of different doses of alpha-terthienyl and different disposal time to water.


RESULTS
The LC50 of alpha-terthienyl to Aedes albopictus larvae was 2.37 microg/L under UVA. The best effect was shown when the larvae were incubated with alpha-terthienyl 3 h in dark. Alpha-terthienyl could significantly inhibit the larva development and the emergence of the pupae. Under strong sunlight, the larvae were quickly killed by high concentration alpha-terthienyl. The 24 hours effect of alpha-terthienyl was better when it was applied at 5 AM than that of at 10 AM and 1 PM.


CONCLUSIONS
Alpha-terthienyl is an effective, practicable larvicide which prohibits the growth and development of the larvae of Aedes albopictus.
Ren
Xiao-yan
XY
Central Laboratory, Liaocheng People's Hospital, Liaocheng 252000, China.
Zhang
Ling-min
LM
Zhu
Pei-xian
PX
Xiong
Zhong-jin
ZJ
Wu
Chun-yun
CY
D000330:Aedes / Q000187:drug effects* / Q000254:growth & development / Q000528:radiation effects; D000818:Animals; D004305:Dose-Response Relationship, Drug; D007306:Insecticides / Q000633:toxicity*; D007814:Larva / Q000187:drug effects / Q000254:growth & development / Q000528:radiation effects; D007928:Lethal Dose 50; D013876:Thiophenes / Q000633:toxicity*; D014466:Ultraviolet Rays
D007306:Insecticides; D013876:Thiophenes; C019101:alpha-terthienyl