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The conventional wisdom is that botanical pesticides is low toxicity , safety , pollution-free pesticides . In order to verify this assertion , This selection of azadirachtin , pyrethrins , rotenone , matrine , osthole five botanical pesticides , referring to the chemical pesticide environmental safety evaluation test criteria \method to test the acute toxicity of five pesticides on bees , quail , zebra fish and silkworm . Based on toxicity levels and criteria for the classification of the toxicity of several pesticides and toxic levels is clear , and the evaluation of its the environment toxic effects on non- target organisms . Experimental results show that : azadirachtin , pyrethrins , rotenone , matrine , osthole bees acute toxicity LC50 (48 h) intake were : 0.02,0.71,1105.29 , gt ; 1820 , gt ; 2000mg / L ; quail acute oral toxicity LD50 (168 h) , respectively : 13.09,97.04,111.75 , gt ; 73.00 , gt ; 208.00 mg / kg · bw ; zebrafish acute toxicity LC50 (96 h) , respectively : 0.05 , 0.15,0.03, gt; 73.00, gt; 100mg / L; silkworm acute ingestion toxicity LC50 (96 h) : 1.28,0.30,2.55 , gt ; 2000, gt; 2000mg / L . Bees acute ingestion toxicity Level: azadirachtin as highly toxic pyrethrin is highly toxic , the rotenone , matrine and osthole for low toxicity ; quail acute oral toxicity level : Azadirachtin is highly toxic pyrethrin and rotenone poisoning the matrine osthole unable to determine ; acute toxicity Level: zebrafish azadirachtin and fish , rotenone is highly toxic , pyrethrin is highly toxic , matrine and osthole the low poison ; silkworm acute toxicity Level: pyrethrin is highly toxic , azadirachtin and rotenone is highly toxic , matrine and osthole for the low toxicity ; the field application the the silkworm potential risk level: pyrethrin and rotenone ketone pole high risk , high risk factors matrine and Osthol of azadirachtin low risk . Azadirachtin , pyrethrins and rotenone toxicity to non-target organisms , especially the risk silkworm . Low of matrine and osthole toxicity relative safety .
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