Understanding Novaluron: The Active Ingredient in MultiFly Feed-thru Fly Control for Horses

As horse owners, maintaining the health and comfort of our equine companions is always a top priority. One challenge that frequently arises, especially during warmer months, is the control of flies. Flies not only cause discomfort to horses but can also lead to various health issues. Enter MultiFly Feed-thru Fly Control for Horses, a product powered by the active ingredient novaluron. In this blog post, we will delve into what novaluron is, how it works as a chitin synthesis inhibitor, and why it is safe for mammals while being effective against flies.

What is Novaluron?

Novaluron is an insect growth regulator (IGR) that specifically targets the developmental stages of insects. Unlike traditional insecticides that kill adult insects on contact, novaluron works by interfering with the life cycle of pests, ensuring they never reach maturity. This makes it a more sustainable and long-term solution for fly control.

How Does Novaluron Work?

Novaluron functions as a chitin synthesis inhibitor. Chitin is a critical component of an insect's exoskeleton. For insects to grow, they must periodically shed their exoskeleton through a process known as molting. During this process, the synthesis of new chitin is essential for the formation of a new exoskeleton.

By inhibiting chitin synthesis, novaluron disrupts this process, leading to the inability of larvae to develop into adult flies. Here’s a breakdown of how it works:

  1. Ingestion by Larvae: When horses are given feed containing MultiFly, they excrete the active ingredient in their manure.
  2. Larvae Exposure: Fly larvae that come into contact with or ingest novaluron-treated manure are affected.
  3. Inhibited Development: The chitin synthesis inhibition prevents larvae from developing properly, causing them to die before they can mature into adult flies.

Why Novaluron is Safe for Mammals

One of the most significant advantages of novaluron is its specificity to insects. Here’s why it doesn't pose a threat to mammals, including horses and humans:

  • Targeted Action: Novaluron targets enzymes involved in chitin synthesis, a process that is unique to insects. Mammals, including horses, do not produce chitin.
  • Low Toxicity: Studies have shown that novaluron has low toxicity to mammals. It does not affect the digestive enzymes or cellular processes of mammals.
  • Regulatory Approval: Novaluron has been thoroughly tested and approved by regulatory bodies for use in various applications, including agricultural and veterinary products.

Benefits of Using MultiFly Feed-thru Fly Control

By incorporating novaluron, MultiFly Feed-thru Fly Control offers several benefits:

  • Effective Fly Control: Reduces the fly population by preventing larvae from developing into adults.
  • Non-Toxic to Horses: Safe for horses to ingest and does not affect their health.
  • Ease of Use: Simply add to your horse’s feed for continuous protection.
  • Environmental Safety: Unlikely to harm beneficial insects or wildlife when used as directed.


Novaluron, as the active ingredient in MultiFly Feed-thru Fly Control, provides an innovative and effective solution for controlling fly populations around your horses. Its ability to inhibit chitin synthesis in insect larvae without affecting mammals makes it a safe and reliable choice for equine fly control. By choosing MultiFly, you can ensure your horses are comfortable and free from the nuisance and potential health risks posed by flies.

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