Research progress on pyrethroid moth repellants
Dexenyl permethrin is a pyrethroid pesticide developed in Japan. It has a low vapor pressure of 14 mPa / 23.6 C at room temperature. It can quickly knock down, fumigate and repel insects. The use of moths can also control other pests. In recent years, the usage of dexfenthrin in the Japanese moth repellent market has gradually increased, almost exceeding 50%. Europe, Australia, Japan, Southeast Asia, South America and many other countries and regions have registered and used it, and have been included in the WHO list. It entered my country in the 1990s, and has been registered as a moth repellant in my country's existing technical and preparation products. The main dosage forms are tablets and newly registered insect repellent covers. Through risk assessment data analysis, pyrethroid moth repellent products are relatively safe, and have almost no odor, and are environmentally friendly products. But also because there is no smell, some people feel tasteless, and it is easy to mistakenly think that the effect is not good. Such products usually use an external protective frame (to avoid direct contact between skin and clothing) for protection; at the same time, there is also a reminder for replacement time, that is, when the product is about to run out of active ingredients, the paper will appear "thank you" or "thank you" after discoloration. Please replace the words such as ", etc., reminding
People change it, and some attach a card to the product, allowing the user to mark the placement time so that they can be replaced based on the expiration date. From the point of view of safety and development, the market space of dexfenthrin may have a gradual upward trend. Of course, it is also expected that safer and more environmentally friendly moth repellants will be produced.
Research progress of slow-release fur clothing moth repellent
Fur clothing is high-end clothing. Since it is made of mink, fox, rat, sheep, raccoon dog, raccoon and other animal skins, it is expensive, and it is also susceptible to moth-eaten or mildew in the process of storage. Therefore, it is necessary to carry out anti-mold and anti-moth protection during the storage process, and anti-moth products such as sanitary balls on the market generally contain substances harmful to human body such as naphthalene and p-dichlorobenzene. Both α-bromocinnamaldehyde and camphor essential oil are low-toxicity moth and mildew-proof agents, but their melting point is low and volatility is strong, so they are not easy to be used for a long time. Slow-release solid moth repellent has the advantages of controllable release rate and long storage time. The preparation method is as follows: the agar solution is mixed with α-bromocinnamaldehyde, camphor essential oil and auxiliary materials in proportion, emulsified and condensed to form a solid insect repellent with slow release effect. The moth repellent prepared by the method has the characteristics of long effective time and less harm. With camphor essential oil and α-bromocinnamaldehyde as the main raw materials, with agar strips, Tween-20, diatomaceous earth, xanthan gum, and sodium lauryl sulfate as auxiliary materials, it can be emulsified, homogenized, coagulated and other processes. Made into solid gel slow-release moth repellent. Use this moth repellant to kill common fur borers such as black beetle and has a long shelf life.
