害虫和昆虫之间的区别

害虫与昆虫

害虫与昆虫之间存在一些关系，因为有些害虫是昆虫。但是，所有昆虫都不是害虫。其中一些是对人类的有益生物。害虫组包括脊椎动物，无脊椎动物和植物。本文打算比较这两种生物，害虫和昆虫。

害虫

害虫是人类的竞争对手。害虫一词可以定义为，任何对人类造成伤害的生物或生物，都超出了经济阈值的水平。经济阈值水平是可以容忍而不会经济损失的害虫种群的最大水平。害虫组包括昆虫，壁虱，螨虫，线虫，鸟类，哺乳动物和植物。无脊椎动物害虫包括寄生虫（虱子，臭虫），疾病传播剂（蚊子，蓟马和果蝇）以及导致剂（白蚁）的损害。

Any killing agent that kills pests is called a pesticide. Other than using pesticides, there are several alternative methods such as biological pest control, cultural practices, traps, repellent etc.

Insect

您知道昆虫已经存在了大约3.5亿年，而人类只有130，000年？昆虫是一类节肢动物。他们不断与人类的生命互动，无论是作为害虫还是有益的生物。另外，有些昆虫物种是生态系统的重要组成部分。由于昆虫可以忍受不利的环境条件，因此它们在世界范围内广泛分布。

昆虫的身体可以分为三个部分。那些是头，胸部和腹部。Characteristic features of insects include the presence of one pair of antennae, two pairs of wings (a few insects such as ants don’t have wings, and some insects such as flies only have one pair of wings), and three pairs of segmented legs. Metamorphism is the common feature of all insects. There are two types of metamorphosis – incomplete and complete. They have exoskeletons, which consists of chitins. Any killing agent that is usesd to kill insects is called as insecticide. Pests that are insects can be biologically controlled by another type of insects. Those can be either parasite (group hymenoptera) or predators (group coccinellidae and carabidae) of the insect pest. Also, insects are important in pollination and environmental sustainability. Some insects such as moths are pest at the larval stage and beneficial as pollinators at the adult stage. Entomology is the branch of Zoology concerned with the study of insects.

What is the difference between Pest and Insect? •害虫是对人类造成伤害的生物，超出了经济阈值水平。当害虫种群达到经济阈值水平时，应采用害虫控制方法。害虫包括无脊椎动物，脊椎动物和植物。有些害虫是昆虫，但所有昆虫都不是害虫。 •即使所有害虫都对人有害，但有些昆虫是有益的。 •杀死害虫的杀死剂是农药，杀死昆虫的杀虫剂是杀虫剂。 •除杀虫剂和农药外，还有一些环保方法。 •昆虫属于节肢动物。昆虫的特征包括一对触角，两对翅膀和三个腿。 •变质是所有昆虫的共同特征。有两种类型的变形 - 不完整和完整。 •昆虫的身体可以分为三个部分 - 头部，胸部和腹部。此外，它们还有一个外骨骼，是由几丁质制成的。 •昆虫的生物控制剂有两种类型。它们是寄生虫和捕食昆虫。 •一些昆虫（例如飞蛾）是幼虫阶段的害虫，并在成年阶段成为有益的生物。