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首页> 外文期刊>Environmental toxicology and chemistry >COMPARATIVE SENSITIVITY OF AMPHIBIAN TADPOLES TO SINGLE AND PULSED EXPOSURES OF THE FOREST-USE INSECTICIDE FENITROTHION
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COMPARATIVE SENSITIVITY OF AMPHIBIAN TADPOLES TO SINGLE AND PULSED EXPOSURES OF THE FOREST-USE INSECTICIDE FENITROTHION

机译：两栖类触角对林用杀虫性硫磷单次和脉冲暴露的敏感性比较

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摘要

The insecticide fenitrothion is sprayed twice, 5 to 10 d apart, to control spruce budworm. To assess the effects of pulsed exposure of fenitrothion to different species of amphibians, we exposed 1- and 8-d-old tadpoles of wood frogs, leopard frogs, green frogs, bullfrogs, and American toads, as well as larvae of the spotted salamander, to 2 to 9 ppm of the insecticide for 24 h. Our results indicate that within each ranid species, day-1 and day-8 tadpoles are equally sensitive, and tadpoles exposed twice, on day 1 and day 8, are no more sensitive to the second exposure than to the first. Bullfrog and green frog tadpoles are more sensitive to exposures than are wood frog and leopard frog tadpoles, exhibiting paralysis at lower concentrations, and they are affected by exposure to the carrier compounds as well as the insecticide. The greater sensitivity of the green frog and bullfrog tadpoles correlates with their smaller size and earlier developmental stage at hatching. American toad tadpoles are more tolerant of pulsed exposure to fenitrothion than are any of the ranids, whereas the spotted salamander larvae are as sensitive as are the bullfrog and green frog tadpoles.
机译：杀虫剂杀虫硫磷喷洒两次，间隔5至10天，以控制云杉芽虫。为了评估脉冲杀铁硫磷对不同种类的两栖动物的暴露影响，我们暴露了1和8日龄的of，它们分别是木蛙，豹蛙，绿蛙，牛蛙和美洲蟾蜍以及斑the的幼虫。在24小时内达到2至9 ppm的杀虫剂。我们的结果表明，在每个each科动物中，第1天和第8天的equally同样敏感，在第1天和第8天暴露两次的t对第二次暴露的敏感性不比对第一次暴露的敏感性高。牛蛙和绿蛙t比木蛙和豹蛙t对暴露更敏感，它们在较低浓度下表现出瘫痪，并且受到暴露于载体化合物和杀虫剂的影响。绿蛙和牛蛙t的敏感性较高，与它们的较小尺寸和孵化的早期发育有关。美国蟾蜍t比其他任何类对脉冲杀虫剂的耐受性更高，而斑点sal幼虫与牛蛙和绿蛙t一样敏感。

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