locusta

简明释义

英[ləʊˈkʌstə]美[loˈkʌstə]

n. 草之小穗；状花序

n. （Locusta）人名；（意）洛库斯塔

复 数 l o c u s t a e

英英释义

单词用法

同义词

反义词

例句

1.The subgenual organ in Locusta migratoria manilensis is composed of scolopidia, each of which mainly possesses three types of cells: sensory cell, scolopale cell and cap cell.

东亚飞蝗膝下器由具橛感器组成，每一具橛感器主要由三类细胞组成，即：感觉细胞、感橛细胞和冠细胞。

2.The subgenual organ in Locusta migratoria manilensis is composed of scolopidia, each of which mainly possesses three types of cells: sensory cell, scolopale cell and cap cell.

东亚飞蝗膝下器由具橛感器组成，每一具橛感器主要由三类细胞组成，即：感觉细胞、感橛细胞和冠细胞。

3.The subgenual organ in Locusta migratoria moniliasis is composed of scolopidia.

东亚飞蝗的下属器官是由螺旋孢子虫组成的。

4.Farmers often struggle with locusta infestations during the summer.

农民在夏季常常面临蝗虫侵扰的问题。

5.The scientist studied the migration patterns of locusta species.

科学家研究了蝗虫物种的迁徙模式。

6.The chef prepared a delicious dish using locusta.

厨师用蝗虫准备了一道美味的菜肴。

7.In some cultures, eating locusta is considered a delicacy.

在一些文化中，吃蝗虫被视为一种美味。

8.A swarm of locusta can devastate crops in a matter of days.

一群蝗虫可以在几天内摧毁农作物。

作文

The word locusta refers to a type of grasshopper, specifically the genus that includes various species commonly known as locusts. These insects are notorious for their swarming behavior, which can lead to devastating agricultural damage. Understanding the biology and behavior of locusta is crucial for farmers and ecologists alike, as these creatures can significantly impact food security and ecosystems. In this essay, I will explore the characteristics of locusta, its life cycle, and the effects it has on agriculture and the environment.Firstly, locusta belongs to the family Acrididae, and its members are typically characterized by their long hind legs, which allow them to jump great distances. They have a cylindrical body and are usually green or brown, providing camouflage against predators. One of the most fascinating aspects of locusta is its ability to change behavior and morphology in response to population density. When in low numbers, they are solitary and behave like typical grasshoppers; however, when populations increase, they undergo a transformation into gregarious swarms. This phenomenon is known as phase polyphenism, where the insects change color, behavior, and even reproductive strategies.The life cycle of locusta consists of several stages: egg, nymph, and adult. Female locusts lay eggs in the soil, and the eggs hatch into nymphs, which resemble miniature adults but lack wings. Nymphs go through several molts before becoming fully mature adults. The entire process from egg to adult can take anywhere from a few weeks to several months, depending on environmental conditions such as temperature and humidity. During this time, if conditions are favorable, populations can explode, leading to the formation of massive swarms.The impact of locusta on agriculture cannot be overstated. Swarms of locusts can travel long distances, consuming vast amounts of crops in a matter of hours. This can lead to severe food shortages, especially in regions where agriculture is the primary source of sustenance. Countries in Africa, the Middle East, and parts of Asia are particularly vulnerable to locust invasions, as their economies often rely heavily on farming. The United Nations Food and Agriculture Organization (FAO) monitors locust populations and provides support to affected areas to help mitigate the damage caused by these pests.In addition to their economic impact, locusta also plays a role in the ecosystem. As herbivores, they contribute to nutrient cycling by consuming vegetation and returning nutrients to the soil through their waste. However, when their populations explode, the balance can be disrupted, leading to overgrazing and loss of biodiversity. This can have cascading effects on other species that depend on the same vegetation for food and habitat.In conclusion, the study of locusta is essential for understanding both the challenges and benefits these insects present. While they can cause significant agricultural damage and threaten food security, they are also an integral part of many ecosystems. By learning more about their behavior and life cycle, we can develop better strategies for managing their populations and minimizing their impact on agriculture and the environment. As climate change continues to affect weather patterns and ecosystems worldwide, the importance of monitoring and understanding locusta will only grow, making it a critical area of research for scientists and policymakers alike.

单词locusta指的是一种蝗虫，特别是包括各种被称为蝗虫的物种的属。这些昆虫以其成群结队的行为而闻名，这可能导致农业的毁灭性损害。理解locusta的生物学和行为对于农民和生态学家来说都至关重要，因为这些生物会显著影响粮食安全和生态系统。在这篇文章中，我将探讨locusta的特征、生活周期以及它对农业和环境的影响。首先，locusta属于蚱蜢科，其成员通常以长后腿为特征，能够跳跃很远的距离。它们的身体呈圆柱形，通常为绿色或棕色，可以在捕食者面前伪装。locusta最迷人的方面之一是它在种群密度变化时能够改变行为和形态。当数量较少时，它们是孤独的，表现得像典型的蚱蜢；然而，当种群增加时，它们会转变为成群的蝗虫。这种现象被称为相位多态性，昆虫的颜色、行为甚至繁殖策略都会发生变化。locusta的生活周期包括几个阶段：卵、若虫和成虫。雌性蝗虫在土壤中产卵，卵孵化成若虫，若虫看起来像迷你版的成虫，但没有翅膀。若虫经历几次蜕皮后才能成熟为成虫。从卵到成虫的整个过程可能需要几周到几个月的时间，具体取决于温度和湿度等环境条件。在此期间，如果条件适宜，种群可以迅速增长，形成巨大的蝗虫群。locusta对农业的影响不可小觑。蝗虫群可以长途迁徙，在短短几个小时内消耗大量作物。这可能导致严重的粮食短缺，尤其是在农业是主要生存来源的地区。非洲、中东和部分亚洲国家特别容易受到蝗虫侵袭，因为它们的经济往往严重依赖农业。联合国粮食及农业组织（FAO）监测蝗虫种群，并向受影响地区提供支持，以帮助减轻这些害虫造成的损害。除了经济影响外，locusta在生态系统中也发挥着作用。作为草食动物，它们通过消费植被并通过排泄物将养分返回土壤，从而有助于养分循环。然而，当它们的种群爆炸时，生态平衡可能会被打破，导致过度放牧和生物多样性的丧失。这可能对其他依赖同一植被作为食物和栖息地的物种产生连锁反应。总之，研究locusta对于理解这些昆虫所带来的挑战和好处至关重要。尽管它们可能造成严重的农业损害并威胁粮食安全，但它们也是许多生态系统的重要组成部分。通过更多地了解它们的行为和生活周期，我们可以制定更好的管理策略，以减少它们对农业和环境的影响。随着气候变化继续影响全球天气模式和生态系统，监测和理解locusta的重要性只会增加，使其成为科学家和政策制定者研究的关键领域。