Formula (I) 1,2,4- thiadiazole compounds under the bright Off whats of this Hair:Wherein R1 shows C3-C7 alkynyls, ethyl-oxygen-of stretching that the straight Chain of C4-C7 that the straight Chain of C4-C7 of mono- to four Ge R2 substitutions of X Shi Election Select The stretch mono- to four Ge R2 substitutions of alkyl, Election Select The stretch mono- to four Ge R4 substitutions of alkenyl, Election Select The stretches ethyl-sulphur-of stretching of mono- to four Ge R4 substitutions of ethyl, Huo person Election Select The and stretches ethyl, R2 Shi Halogen elements atom, trifluoromethyl or C1-C4 alkyl and R4 show fluorine atom or C1-C3 alkyl. 1,2,4- thiadiazole compound has Gifted Iso Hai Insect controls activity and can efficiently control Hai Insect, such as Kun Insect Hai Insect, ?(acarine) Hai Insect.本發明關於下式(I)1,2,4-噻二唑化合物:其中R1示C3-C7炔基,X示選擇性經一至四個R2取代之C4-C7直鏈伸烷基、選擇性經一至四個R2取代之C4-C7直鏈伸烯基、選擇性經一至四個R4取代之伸乙基-氧-伸乙基、或者選擇性經一至四個R4取代之伸乙基-硫-伸乙基,R2示鹵素原子、三氟甲基或C1-C4烷基,及R4示氟原子或C1-C3烷基。1,2,4-噻二唑化合物具有優異害蟲控制活性及可有效地控制害蟲,如昆蟲害蟲、蟎(acarine)害蟲等。
