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Chinese Journal of Applied Ecology ›› 2005, Vol. 16 ›› Issue (11): 2140-2143.

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Effects of avermectin B1a on soil microorganism and earthworm(Eisenia fetida)

SUN Yingjian1,2, DIAO Xiaoping1, SHEN Jianzhong 1   

  1. 1. China Agricultural University, Beijing 100094, China;
    2. Department of Animal Science, Beijing Agricultural College, Beijing 102206, China
  • Received:2004-09-10 Revised:2005-06-22 Online:2005-11-15 Published:2005-11-15

Abstract: Avermectins are the pesticides widely applied in agriculture.This paper studied the effects of different concentration avermectin B1a(AVM B1a) on soil bacteria and fungi,soil respiration,and soil earthworm(Eisenia fetida).The results showed that in 4 test soils,bacteria were significantly inhibited when the AVM B1a concentration was higher than 83.3 mg·kg-1,while fungi were less impaired.Soil respiration was also inhibited by high concentration AVM B1a,which differed with soil types.The half lethal dosage(LD50) of AVM B1a to soil earthworm was estimated as 4.63 μg·cm-2 in filter paper contact test,and as 24.13 and 17.06 mg·kg-1,respectively after treated 7 and 14 days in artificial soil.

Key words: Avermectin B1a, Soil microorganism, Earthworm, Acute toxicity

CLC Number: