[Objective] The paper was to screen the pesticides with good control effects against pests in mulberry and small impact on silkworm. [Method] The combined method of indoor toxicity test, field efficacy test, fast test...[Objective] The paper was to screen the pesticides with good control effects against pests in mulberry and small impact on silkworm. [Method] The combined method of indoor toxicity test, field efficacy test, fast testing of pesticide residues and residual toxicity determination were adopted to carry out test. [ Re- suit] Indoor toxicity results showed that LC50 of mulberry No. 1 against Hyalopterus amygdale was （316.1±57.3） mg/kg, and the control effect of mulberry No. 1 at 14 d reached 62.58% ; fast testing of pesticide residues at 7 d showed that the mulberry leaves were safe to silkworms, which reached the standard of leaves for silkworm. [ Conclusion] Mulberry No. 1 was recommended to be the Special pesticide to apply in mulberry field.展开更多
This study analyzes the level of total and bound pirimiphos-methyl residues in treated wheat grain and its toxic effects on rats.Wheat grain was treated with[(14)~C]pirimiphos-methyl of 16.36 mCi/mmol specific activit...This study analyzes the level of total and bound pirimiphos-methyl residues in treated wheat grain and its toxic effects on rats.Wheat grain was treated with[(14)~C]pirimiphos-methyl of 16.36 mCi/mmol specific activity to determine the bioavailability of bound residues in rats.At the same time,grain was treated with nonlabeled pirimiphos-methyl as required to determine any possible toxic effects of bound residues in a subacute feeding study in rats.Two dose levels were used:10 and 100 ppm(the former being the recommended dose level in practical treatment). Estimation of the type of residues was performed at intervals of 0,30,90,120,150,and 180 days.During and after the animal feeding study,changes in body weight gain,organ weight, cholinesterase activity,serum enzyme activity,and hematology were investigated.There is an indication that bound residues of the pesticide pirimiphos-methyl provoke toxic effects to some extent.1989 Academic Press.Inc.展开更多
The level of bound malathion residues in treated wheat grain and its toxic effects on rats were investigated. Wheat grain was treated with [14C] malathion (specific activity: 2.76 MBq/mg) to determine the bioavailabil...The level of bound malathion residues in treated wheat grain and its toxic effects on rats were investigated. Wheat grain was treated with [14C] malathion (specific activity: 2.76 MBq/mg) to determine the bioavailability of bound residues in rats. At the same time, grain was treated with nonlabeled malathion to test for possible toxic effects of bound residues in a subchronic (90 days) feeding study in rats at two dose levels. 10 and 100 ppm.It was observed that the level of malathion-bound residues amounted to 11.28% of the applied dose (for six months). Also, it was noted that the main route of [14C]-malathion excretion was through the urine. This signifies that grain-bound malathion was bioavailable. In subchronic test on rats bound malathion residues (both dose levels) induced effects to some extent in organ weight (spleen and adrenals), and blood ChE activity. In both, males and females, there was an increase in SGPT activity (lower dose), and in alkaline phosphatase in females (higher dose). Hematological data showed changes only in hemoglobin concentration in males (both dose levels).展开更多
基金Supported by Education Science Foundation of Guangxi Education Department(GJKY[2007]No.34)~~
文摘[Objective] The paper was to screen the pesticides with good control effects against pests in mulberry and small impact on silkworm. [Method] The combined method of indoor toxicity test, field efficacy test, fast testing of pesticide residues and residual toxicity determination were adopted to carry out test. [ Re- suit] Indoor toxicity results showed that LC50 of mulberry No. 1 against Hyalopterus amygdale was （316.1±57.3） mg/kg, and the control effect of mulberry No. 1 at 14 d reached 62.58% ; fast testing of pesticide residues at 7 d showed that the mulberry leaves were safe to silkworms, which reached the standard of leaves for silkworm. [ Conclusion] Mulberry No. 1 was recommended to be the Special pesticide to apply in mulberry field.
文摘This study analyzes the level of total and bound pirimiphos-methyl residues in treated wheat grain and its toxic effects on rats.Wheat grain was treated with[(14)~C]pirimiphos-methyl of 16.36 mCi/mmol specific activity to determine the bioavailability of bound residues in rats.At the same time,grain was treated with nonlabeled pirimiphos-methyl as required to determine any possible toxic effects of bound residues in a subacute feeding study in rats.Two dose levels were used:10 and 100 ppm(the former being the recommended dose level in practical treatment). Estimation of the type of residues was performed at intervals of 0,30,90,120,150,and 180 days.During and after the animal feeding study,changes in body weight gain,organ weight, cholinesterase activity,serum enzyme activity,and hematology were investigated.There is an indication that bound residues of the pesticide pirimiphos-methyl provoke toxic effects to some extent.1989 Academic Press.Inc.
文摘The level of bound malathion residues in treated wheat grain and its toxic effects on rats were investigated. Wheat grain was treated with [14C] malathion (specific activity: 2.76 MBq/mg) to determine the bioavailability of bound residues in rats. At the same time, grain was treated with nonlabeled malathion to test for possible toxic effects of bound residues in a subchronic (90 days) feeding study in rats at two dose levels. 10 and 100 ppm.It was observed that the level of malathion-bound residues amounted to 11.28% of the applied dose (for six months). Also, it was noted that the main route of [14C]-malathion excretion was through the urine. This signifies that grain-bound malathion was bioavailable. In subchronic test on rats bound malathion residues (both dose levels) induced effects to some extent in organ weight (spleen and adrenals), and blood ChE activity. In both, males and females, there was an increase in SGPT activity (lower dose), and in alkaline phosphatase in females (higher dose). Hematological data showed changes only in hemoglobin concentration in males (both dose levels).
