词汇 | herbicide |
释义 | herbicide noun[ C or U ] uk /ˈhɜː.bɪ.saɪd/ us /ˈhɝː.bɪ.saɪd/ a chemical that is used to destroy plants, especially weeds除草剂 Synonym weedkiller Compare insecticide pesticide Plant pathology anthracnose antifungal apple scab ash dieback auxin canker downy mildew dry rot Dutch elm disease etiolated excrescence fungicidal leaf scorch leaf spot nodal organophosphate pesticide potato blight scald sterility You can also find related words, phrases, and synonyms in the topics: Improving fertility & pest control Examples of herbicideherbicide With all herbicides banned, manual weeding is usually a considerable cost factor in organic coffee production. Each farmer decides the rotation, and the amount and the time of application of fertilizers and herbicides. In other words, the technological fix of herbicide-resistant crops is transient, requiring continual reinvigoration by more advanced technology. The most important genetically engineered crops that have been introduced contained genes encoding insect resistance and herbicide tolerance; they were soybean, maize, cotton and canola. Given the erosion potential, environmental concerns associated with herbicides, and herbicideresistant weeds, alternative cropping systems that mitigate these problems need to be assessed economically. The former allow farmers to increase herbicide applications without risking damage to their crops, while the latter run the risk of creating pesticide immune pests. This increased yields for the life-time of the plantation while also permitting a more effective subsequent deployment of fertilisers and herbicides. The pre-emergence herbicide was used every year uniformly to all the treatments to control weeds. Applying a selective herbicide to the no-till intercrop treatment would have stunted alfalfa growth and therefore would probably have benefitted wheat growth and production. The integration of livestock into the farm operation can increase the use of forages and allow for herbicide use reduction31. But where and on what scale irrigation, fertilisers, and herbicides would be allocated for food production on newly freed up cane land remained obscure. Most winegrape growers, on the other hand, disked for weeds and use pre-emergent herbicides. They also respond to the labor market effects of employment creation in the industrial sector by substituting herbicides for increasingly expensive weeding labor. The most commonly cited for ms of control require careful use of chemical herbicides. Surviving weeds that had received sublethal doses of herbicide were less competitive than untreated ones. 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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