The invention relates inter alia to halogen-substituted compounds of the general formula (I) in which the A1-A4, T, W, Q, R1 and Z1-Z3 radicals are as defined in the description. Also described are processes for preparing the compounds of the formula (I). The compounds according to the invention are especially suitable for controlling insects, arachnids and nematodes in agriculture, and ectoparasites in veterinary medicine.本發明係關於,其中包括,通式(I)之經鹵素取代的化合物其中A1-A4、T、W、Q、R1和Z1-Z3基係如說明書之定義。亦描述製備式(I)化合物之方法。本發明之化合物特別適合於農業上防治昆蟲、蛛形綱節肢動物、線蟲,以及獸醫上之體外寄生蟲。