3种助剂对赤子爱胜蚓的急性毒性

摘要

To explore impacts of a new pesticide adjuvant LD-10 (patent license number:200810103519.7) and two commonly used pesticide adjuvants NP-10 and NP-4 on non-target organisms in soil,acute toxicities of LD-10,NP-10 and NP-4 to earthworm (Eisenia fetida) in natural soil and sterilized soil were determined.Results show that in the natural soil,the 7 d w(LC50) of LD-10,NP-10 and NP-4 for earthworm was 482.58,1 077.50 and 343.17 mg · kg-1,respectively,and 14 d w(LC50) 438.38,984.64 and 316.65 mg · kg-1,respectively,and in the sterilized soil,the 7 d w(LC50) of LD-10,NP-10 and NP-4 for earthworm was 350.71,960.95 and 309.63 mg · kg-1,respectively,and 14 d w(LC50) 320.24,745.99 and 274.76 mg · kg-1,respectively,which shows that in both the natural and sterilized soils,the three agents are all low in toxicity to the earthworm,and follow the order of NP-10 ＜ LD-10 ＜ NP-4 in toxicity,however,they are more toxic in the sterilized soil than in the natural soil.%为了探究新型助剂LD-10与常用助剂NP-10、NP-4对土壤非靶标生物的影响,以赤子爱胜蚓(Eisenia fetida)为受试生物,采用自然土壤法和灭菌土壤法,研究了这3种助剂对土壤蚯蚓的急性毒性.结果表明,在自然土壤中LD-10、NP-10和NP-4对蚯蚓7d半致死浓度w(LC50)分别为482.58、1 077.50和343.17 mg·kg-1,14 d的w(LC50)分别为438.38、984.64和316.65 mg.kg-1.在灭菌土壤中LD-10、NP-10和NP-4对蚯蚓7d的w(LC50)分别为350.71、960.95和309.63 mg·kg-1,14d的w(LC50)分别为320.24、745.99和274.76 mg·kg-1.在自然土壤和灭菌土壤中3种助剂对赤子爱胜蚓均为低毒,毒性由大到小依次为NP-4、LD-10和NP-10,且3者在灭菌土壤中的毒性均明显高于自然土壤.