Toxicity of Modified HL Simulant and Methyl Salicylate in Soil on Cucumbers andEarthworms

摘要

Tests were conducted to determine if methyl salicylate (MS), a component of HLsimulant, was responsible for the toxicity exhibited by cucumbers and earthworms. The HL simulant without methyl salicylate (HLMS) and MS were tested for their toxicity to cucumbers and earthworms. The HLMS was tested at 0, 1,000, 5,000, 1 0,000, and 25,000 mg/kg by weight; MS was tested at 0, 50, 100, 200, 350, and 500 mg/kg by weight. The HLMS in soil produced no lethal or sublethal effects on cucumber plants at 1,000, 5,000, and 10,000 mg/kg levels, but the HLMS in soil produced sublethal effects at the 25,000 mg/kg level. Earthworms treated with HLMS had a survival rate of 100% for all treatment levels. The MS produced sublethal effects on cucumbers at the 350 and 500 mg/kg levels. Earthworms in soil dosed with MS showed an increasing weight loss with increasing concentrations. Survival rates were 100% at the 0-200 mg/kg levels, 87% at 350 mg/kg, and 0% at the 500 mg/kg level. An earlier CRDEC study (CRDEC TR-257, March 1991), HL simulant containing 130 mg/kg of MS produced lethal and sublethal effects on earthworms and cucumbers. The study results indicated that is responsible for the effects exhibited by cucumbers and earthworms.... HL Simulant, Terrestrial plants, Phytotoxicity, Earthworms (Eisenia foetida), Methyl salicylate Cucumber (Cucumis sativus, L).