defoliator

简明释义

英[diːˈfəʊlɪeɪtə]美[diˈfolɪˌetər]

n. 去叶剂；食叶虫

英英释义

单词用法

同义词

反义词

例句

1.The Separatists, however, sought to blast the Lurmen village out of existence in a field-test of their new defoliator capsule weapon.

但他想错了。分离军想试射新式的焚灭弹胶囊火炮，将整个勒明村庄夷为平地。

2.The Separatists, however, sought to blast the Lurmen village out of existence in a field-test of their new defoliator capsule weapon.

但他想错了。分离军想试射新式的焚灭弹胶囊火炮，将整个勒明村庄夷为平地。

3.Farmers often use a chemical defoliator to prepare their cotton fields for harvest.

农民们常常使用一种化学脱叶剂来准备他们的棉花田进行收割。

4.Environmentalists are concerned about the effects of synthetic defoliators on local ecosystems.

环保主义者对合成脱叶剂对当地生态系统的影响表示担忧。

5.In some regions, natural defoliators like certain insects are used instead of chemicals.

在某些地区，自然的脱叶剂如某些昆虫被用来替代化学品。

6.The application of a defoliator must be carefully timed to avoid damaging the crops.

使用脱叶剂的时机必须仔细把握，以避免对作物造成损害。

7.The defoliator helps in removing leaves from plants, making it easier to manage pests.

这种脱叶剂有助于去除植物的叶子，从而更容易管理害虫。

作文

In the world of agriculture and horticulture, the term defoliator refers to any agent or organism that causes the loss of leaves from plants. This phenomenon can occur naturally or be induced by various factors, including environmental conditions, pests, or chemical treatments. Understanding the role of defoliators is crucial for farmers and gardeners alike, as it directly impacts plant health and crop yield. One of the most common natural defoliators is the caterpillar stage of certain moth species. These pests feed voraciously on the foliage of trees and shrubs, leading to significant leaf loss. For instance, the gypsy moth, an invasive species in North America, is notorious for its destructive feeding habits. When populations of these defoliators explode, they can strip entire forests of their leaves, resulting in weakened trees that are more susceptible to disease and other stressors.Apart from insects, environmental factors can also act as defoliators. Drought, for example, can cause plants to shed their leaves in order to conserve water. This natural response helps the plant survive in harsh conditions, but it can also lead to reduced photosynthesis and growth. Furthermore, extreme weather events such as storms or heavy snowfall can physically damage leaves, effectively acting as a form of defoliation.In agriculture, the intentional use of chemical defoliators is a common practice. Farmers may apply herbicides or other chemicals to facilitate the harvesting process. For example, cotton producers often use chemical defoliators to remove leaves from cotton plants just before harvest. This practice helps improve the efficiency of harvesting machinery and ensures that the cotton bolls are more accessible. However, the use of chemical defoliators raises concerns about environmental impact and the potential harm to beneficial insects and soil health.The impact of defoliators extends beyond immediate plant health; it can also influence entire ecosystems. When a significant number of leaves are lost, it affects not only the affected plants but also the animals that depend on those plants for food and shelter. For example, birds that nest in trees may find their habitats compromised due to the actions of defoliators. Similarly, herbivores that rely on specific plants for sustenance may face food shortages if those plants are heavily defoliated.In conclusion, defoliators play a multifaceted role in both natural and agricultural settings. While they can be detrimental to plant health and overall ecosystem balance, they also serve as a reminder of the interconnectedness of life. Understanding the dynamics of defoliators allows us to better manage our agricultural practices and protect our natural environments. As we continue to navigate the challenges posed by pests and environmental changes, being informed about the effects of defoliators will be essential for sustainability in agriculture and conservation efforts.

在农业和园艺的世界中，术语defoliator指的是任何导致植物失去叶子的因素或生物。这种现象可以自然发生，也可以由各种因素引起，包括环境条件、害虫或化学处理。理解defoliators的作用对农民和园丁来说至关重要，因为它直接影响植物健康和作物产量。最常见的自然defoliator之一是某些蛾类物种的幼虫阶段。这些害虫贪婪地以树木和灌木的叶子为食，导致显著的叶片损失。例如，吉普赛蛾是北美一种臭名昭著的入侵物种，以其破坏性觅食习性而闻名。当这些defoliators的种群爆炸性增长时，它们可能会将整个森林的叶子剥光，导致树木虚弱，更容易受到疾病和其他压力源的影响。除了昆虫，环境因素也可以作为defoliators。干旱例如，可以导致植物脱落叶子以节省水分。这种自然反应有助于植物在恶劣条件下生存，但也可能导致光合作用和生长的减少。此外，极端天气事件，如风暴或大雪，可能会物理性地损坏叶子，从而有效地作为一种defoliation形式。在农业中，故意使用化学defoliators是一种常见做法。农民可能会施用除草剂或其他化学品来促进收获过程。例如，棉花生产者通常使用化学defoliators在收获前去除棉花植物的叶子。这一做法有助于提高收获机械的效率，并确保棉铃更易接触。然而，使用化学defoliators引发了关于环境影响和对有益昆虫及土壤健康潜在危害的担忧。defoliators的影响超越了即时的植物健康；它还可以影响整个生态系统。当大量叶子丧失时，不仅影响受影响的植物，还影响依赖这些植物提供食物和庇护的动物。例如，在树木中筑巢的鸟类可能会因defoliators的作用而发现其栖息地受到损害。同样，依赖特定植物为生的食草动物，如果这些植物遭到严重的落叶，可能面临食物短缺。总之，defoliators在自然和农业环境中扮演着多方面的角色。虽然它们可能对植物健康和整体生态系统平衡造成危害，但它们也提醒我们生命的相互联系。了解defoliators的动态使我们能够更好地管理农业实践并保护自然环境。随着我们继续应对害虫和环境变化带来的挑战，了解defoliators的影响对于农业的可持续性和保护工作将是至关重要的。