How to Use Insect Growth Regulator to Control Garden Pest

The insect world is so vast, seeking to know all about them and their numbers will blow your mind, they are so diverse and many of them can adapt to the most unforgivable conditions. The presence of insects indicates their search for food, shelter, and water but can become a nuisance and cause major damage if not controlled. It is estimated that for every human, there are more than 1 million insects that outnumber us by far.

Many pesticide brands on the market promise to bring insects under control one such pesticide being insect growth regulator that has been around for some time and has proven to live up to its name.

What is an Insect Growth Regulator?

Insect growth regulator is a chemical that inhibits the life cycle of insects, in other words, insects going through a molting stage. When molting insects come in contact with these regulators it interferes with their cycle hindering them from reaching maturity.

How does Molting Occur in Insects?

The insect’s exoskeleton serves many functions which include acting as a barrier against desiccation supporting the insect, protecting or covering the insect body, excretion, and assisting with feeding. The exoskeleton is made up basically of Chitin and Protein, as the insects grow a new exoskeleton is formed inside of the old exoskeleton. The new exoskeleton swells get larger and harden, once a growth regulator is applied it interferes with the insect molting process during this time the exoskeleton is not formed properly which leads to the death of the insect.

 There are 3 Categories of Insect Growth Insect regulator

• Juvenile
• Anti-juvenile hormone agents
• Chitin Synthesis

Juvenile

The compounds that are found in Juvenile hormones work by stopping or blocking the metamorphosis of insects at the larvae stage from reaching adulthood.

Anti-juvenile hormone agents

When these agents are applied to the instar causes premature molting disrupting the stage that leads to adulthood.

Chitin Synthesis

The chemical works by disrupting the normal molting process by influencing cuticles that are malformed when this occurs their exoskeleton cannot withstand the molting pressure which will cause elimination.

Types of Insect Growth Regulators Product Brands

Here are just the names of a few brands on the market

•  NyGuard Plus.
• Tekko Pro Insect Growth Regulator.
•  Pivot 10 IGR Concentrate.
•  Gentrol Aerosol IGR – 16 oz Can.
•  Shockwave Fogging Concentrate.
•  Altosid Pro-G Mosquito Larvicide.
• Archer IGR.
•  Gentrol IGR Concentrate.
•  AzaGuard Insecticide Nematicide.
•  Gentrol Point Source.

Remember these Points

• Before applying any insecticide/pesticides read and follow the manufacturer’s directions for safe use and the best results.
• Insect growth regulators (IGR) do not kill adult insects these pesticides only affect and kill the eggs, the larva, and the pupa stage.
• Because some IGRs are more effective on some insects than others it’s important to identify the insect first to know which product to purchase to treat the host insect pests.
• IGR can cause harm to pollinators and beneficial insects so it’s best to target specific insect pests which can help to protect beneficial insects and pollinators.
• A combination of control measures for example  Integrated Pest Management helps to control insect problems through prevention, sanitation, and exclusion.

10 Frequently Asked Questions (FAQs)

1. What is an Insect Growth Regulator (IGR)?

An IGR is a special type of pest control that doesn’t kill insects immediately. Instead, it disrupts their life cycle—preventing eggs from hatching or larvae from turning into adults. It’s like birth control for bugs!

2. How do IGRs work on pests?

IGRs mimic insect hormones. They either stop bugs from molting properly, prevent them from reproducing, or keep them stuck in a juvenile stage. This helps reduce long-term infestations without harming your plants.

3. Which pests can IGRs control?

IGRs are great for fighting pests like fleas, mosquitoes, cockroaches, bed bugs, and flies. They’re especially helpful when used alongside traditional insecticides for faster control.

4. Are IGRs safe to use around pets and kids?

Most IGRs are considered low-risk for humans and pets when used as directed. Always read the label and keep kids and animals out of treated areas until the product is dry.

5. Can I use IGRs in my garden or just indoors?

Many IGRs are approved for both indoor and outdoor use. Some are labeled for lawns, flower beds, and even vegetable gardens. Just make sure the product you choose fits your space.

6. How long do IGRs last after spraying?

Most IGRs last anywhere from 2 weeks to 7 months, depending on the formula and environment. Some break down faster in sunlight, so reapply according to label instructions.

7. Will IGRs kill adult insects too?

Nope! IGRs don’t kill adult bugs directly. They only stop reproduction and development. That’s why they’re often used with contact insecticides for a one-two punch.

8. Can I mix IGRs with other pesticides or sprays?

Yes, many IGRs are designed to be tank-mixed with insecticides. This lets you kill adults and halt reproduction at the same time. Always check for compatibility first.

9. Do IGRs work right away?

Not instantly. Since they target growth and reproduction, it can take a few days to weeks to see full results. Be patient—it’s working behind the scenes.

10. Why should I use an IGR instead of just bug spray?

Bug sprays kill what you see. But IGRs target the next generation. Using both gives you complete control, especially for stubborn pests that keep coming back.

Conclusion

Insect growth regulator offers so much help and will make life a lot easier as you seek to win the war on insects that can be a pest. These products have proven to work wonders so for those of you who are thinking about giving insect growth regulators a try I encourage you to go ahead and see for yourself the amazing job these products bring as you seek to live in an environment that is free of insect pests.