代写论文：水葫芦治理
近年来，已经有了一种转移的重点，利用自然的敌人来破坏水葫芦，比如植物病原体。任何这样的方法的目的并不是根除杂草，而是减少其丰富的存在，这样就没有问题。虽然有许多当地的敌人，但两种水风信子和南美洲的象鼻虫已经显示出有效的方法来控制一些国家的杂草，如贝宁、巴布亚新几内亚、路易斯安那、肯尼亚和津巴布韦。南美洲的科学家发现了另一种微小的昆虫，即Megamelus scutellaris(Masto et al .，2013)。这种昆虫是特定于水风信子的宿主，它并没有威胁到任何重要的物种，无论在经济上还是在本土。另一方面，杂草通过减少种子和花的生产、植被的繁殖和植物的大小来减少水葫芦的活力。它们负责促进有害微生物的进入和转移，它们与植物组织中存在的象鼻虫(细菌和真菌)有关。
代写论文：水葫芦治理
Since recent years, there has been a shifted focus towards using natural enemies that destruct water hyacinth such as plant pathogens. The aim of any such method is not the eradication of weed, but reduction of its abundant existence such that it is not problematic. While there are a number of native enemies of the species, two water hyacinth moth and South American weevil beetles have shown effectiveness to control the weed in a number of nations such as Benin, Papua New Guinea, Louisiana, Kenya and Zimbabwe in the longer run. An additional tiny insect was identified by scientists in South America, namely Megamelus scutellaris (Masto et al., 2013). This insect is specific to the host of water hyacinth and it does not end up threatening any important species, economically or natively. On the other hand, weevils end up reducing the vigor of water hyacinth by decreasing seed and flower production, vegetative reproduction, and plant size. They are responsible for facilitating the ingress and transfer of deleterious micro-organisms in association with weevils (bacteria and fungi) present in the plant tissues.
