精萘在农药领域有多种应用，主要包括作为生产原料、增效剂以及驱虫剂等，以下是具体介绍：

Naphthalene has various applications in the field of pesticides, mainly including as a production raw material, enhancer, and insecticide. The following is a specific introduction:

作为农药合成原料

As a raw material for pesticide synthesis

合成拟除虫菊酯类农药：精萘是合成某些拟除虫菊酯类农药的重要原料。例如，以精萘为起始原料，通过一系列的化学反应，可以合成出高效氯氟氰菊酯等。这些拟除虫菊酯类农药具有高效、低毒、低残留等特点，对害虫具有强烈的触杀和胃毒作用，能有效防治多种农作物害虫，如蚜虫、菜青虫、棉铃虫等。

Synthesis of pyrethroid pesticides: Naphthalene is an important raw material for the synthesis of certain pyrethroid pesticides. For example, starting from refined naphthalene, efficient chlorpyrifos and other compounds can be synthesized through a series of chemical reactions. These pyrethroid pesticides have the characteristics of high efficiency, low toxicity, and low residue, and have strong contact and stomach toxicity to pests. They can effectively control various crop pests such as aphids, cabbage caterpillars, cotton bollworms, etc.

合成萘系杀虫剂：精萘可用于合成一些以萘为基本结构的杀虫剂，如萘甲酰亚胺类杀虫剂。这类杀虫剂作用机制独特，对害虫的神经系统等具有干扰作用，能有效控制害虫的生长和繁殖，对一些刺吸式口器害虫，如白粉虱、蓟马等有较好的防治效果。

Synthetic naphthalene insecticides: Refined naphthalene can be used to synthesize insecticides with naphthalene as the basic structure, such as naphthalimide insecticides. This type of insecticide has a unique mechanism of action and interferes with the nervous system of pests, effectively controlling their growth and reproduction. It has good control effects on some piercing sucking mouthparts pests, such as whiteflies and thrips.

合成杀菌剂：精萘能够参与合成某些具有杀菌活性的化合物。例如，一些含有萘环结构的杀菌剂，可用于防治农作物的真菌性病害，如小麦锈病、黄瓜白粉病等，通过抑制真菌的生长和繁殖，保护农作物免受病菌侵害。

Synthetic fungicides: Naphthalene can participate in the synthesis of certain compounds with bactericidal activity. For example, some fungicides containing naphthalene ring structures can be used to prevent and control fungal diseases of crops, such as wheat rust and cucumber powdery mildew, by inhibiting the growth and reproduction of fungi, protecting crops from bacterial invasion.

作为农药增效剂

As a pesticide enhancer

精萘可以作为农药增效剂使用，将其添加到农药配方中，能够增强农药的药效。它可以改变农药在农作物表面的附着性和渗透性，使农药更好地被农作物吸收，提高农药的利用率，从而在一定程度上减少农药的使用量，降低农药残留和对环境的污染，同时还能提高防治效果。

Naphthalene can be used as a pesticide enhancer, and adding it to pesticide formulations can enhance the efficacy of pesticides. It can change the adhesion and permeability of pesticides on the surface of crops, making them better absorbed by crops, improving the utilization rate of pesticides, thereby reducing the use of pesticides to a certain extent, reducing pesticide residues and environmental pollution, and also improving the effectiveness of prevention and control.

作为驱虫剂

As an insect repellent

精萘具有一定的特殊气味，对一些害虫和昆虫具有驱避作用。在农业生产中，有时会利用精萘的这一特性，将其制成驱虫剂，用于保护农作物免受害虫侵害。比如，在仓储粮食中放置含有精萘的驱虫剂，可以防止害虫如米象、麦蛾等对粮食的侵害，起到保护粮食质量和安全的作用。在一些果园中，也会使用含有精萘的驱虫剂来驱赶果蝇等害虫，减少害虫对果实的危害

Naphthalene has a certain special odor and has a repellent effect on some pests and insects. In agricultural production, the characteristic of refined naphthalene is sometimes utilized to make insect repellents, which are used to protect crops from pest infestations. For example, placing insect repellents containing naphthalene in stored grain can prevent pests such as rice weevils and wheat moths from damaging the grain, thus protecting the quality and safety of the grain. In some orchards, insecticides containing naphthalene are also used to drive away pests such as fruit flies and reduce their harm to the fruit