| 词汇 | organophosphate |
| 释义 | organophosphate noun[ C ] uk /ɔːˌɡæn.əʊˈfɒs.feɪt/ us /ɔːrˌɡæn.oʊˈfɑːs.feɪt/ a chemical used for killing insects and small animals that damage crops: 有机磷酸酯（用于杀除危害庄稼的昆虫和小动物） organophosphate pesticides/poisoning有机磷酸酯杀虫剂／中毒 Plant pathology anthracnose antifungal apple scab ash dieback auxin canker downy mildew dry rot Dutch elm disease etiolated excrescence fungicidal leaf rust leaf scorch leaf spot nodal pesticide scald sterility worm-eaten You can also find related words, phrases, and synonyms in the topics: Environmental issues Examples of organophosphateorganophosphate This suggests that additional organophosphate products were used by farmers at times of high insecticide use. With all the organophosphates tested, except fenthion, the decline in resistance was significant. A higher frequency of individuals resistant to chlorpyrifos, disulfoton and ethion was associated with greater use of insecticides, especially other organophosphates. The organophosphate diazinon was the most commonly used active ingredient to control ectoparasites on sheep. However, since the previous survey in 1997, the number of farms overall using organophosphates have reduced. Lure-baited traps incorporate a contact insecticide (usually 1 ml of the organophosphate malathion). Farmers who relied heavily on insecticides tended to prefer to use organophosphates. The effects of number of insecticide applications per year and number of organophosphate applications per year are the same for all three insecticides. This greater use of organophosphates favoured resistance development, as shown by our path analyses for disulfoton and ethion. Previously, the principal method for the prevention or control of this disease was to plungedip sheep in a solution containing organophosphates. Exposures such as organophosphates, radiation and infectious agents, could affect cognition directly by action on the central nervous system. In combination with atropine sulphate, which is already listed, these are recognized antidotes to poisoning by organophosphate pesticides and nerve agents. Unlike the persistent organochlorines, the organophosphate compounds that replaced them were chemically unstable and non-persistent. Extensive use of insecticides has led to the selection of resistance to most chemical classes including organochlorines, organophosphates, carbamates and pyrethroids. Of those sheep dipped, 0.84 received treatments containing organophosphate active ingredients while the remaining 0.16 were treated in dips containing pyrethroids. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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