I have a small garden, and one of the most annoying problems I’ve had recently is bagworms. They seemed to be everywhere, and I eventually decided I needed something that could deal with the infestation. That’s how I ended up trying Spectracide Malathion Spray. I wasn’t prepared for how terrible this stuff smells, but I was certainly hoping it would be tough on the pests. Fortunately, I’ve noticed a difference in my garden since applying it.
Key Takeaways
- Spectracide Malathion is labelled to control bagworms and several other garden pests.
- I haven’t seen the troublesome bagworms in my garden for several days since applying it.
- The smell is extremely harsh and unpleasant.
- I diluted the concentrate before applying it.
- I wore gloves and a face mask and showered immediately afterwards.
- I’m happy with the initial results but still need to see how long the effect lasts.

What Is Spectracide Malathion Spray?
Spectracide Malathion Insect Spray Concentrate is a garden insecticide designed to control several types of unwanted insects on flowers, shrubs, roses, vegetables and certain fruit plants. Its active ingredient is malathion, which makes up 50% of the concentrate. It is an organophosphate insecticide that works by disrupting the nervous system of insects.
The product is marketed for controlling pests such as aphids, mealybugs, mites, thrips, whiteflies and scales. Importantly for my situation, bagworms are also specifically included among the pests listed on the product label.
It is a concentrated formula that must be mixed with water according to the instructions for the particular plant and pest being treated.
Why I Tried It
My small garden had become quite frustrating because bagworms were showing up everywhere. I wanted something that could actually help me get the situation under control rather than just temporarily discourage the insects. I came across Spectracide Malathion and decided to give it a try. Since bagworms are among the pests the manufacturer specifically lists, it seemed like a reasonable option for the problem I was dealing with.
I was hoping to see a noticeable difference after application, although I also wanted the treatment to last long enough that I wouldn’t have to keep dealing with the same infestation.
My Experience With Spectracide Malathion Spray
Let me start with the smell because that was my first major experience with this product, and it was absolutely horrible. My first mistake was putting my nose anywhere near the bottle when I opened it. I almost threw up. The smell is incredibly harsh and unpleasant, and the best comparison I can give is the worst garlic smell imaginable, except considerably more aggressive.
It was so overpowering that my immediate thought was that anything capable of smelling that awful had better be effective against insects! Of course, the smell itself isn’t an indication of how well an insecticide works. I wouldn’t recommend smelling or inhaling it to judge its strength. I certainly learned that lesson the unpleasant way.
Moving on to the actual application, I diluted the concentrate with water before spraying it around my garden. I also wore gloves and a face mask and made sure to shower immediately after finishing.
One thing I noticed was that my plants appeared to tolerate the treatment well. I was concerned about potentially damaging them, but I haven’t noticed any obvious problems since applying it. I believe following the dilution instructions helped, although I’d still be careful with future applications.
Now, the part I’m happiest about is the result. I haven’t seen the troublesome bagworms that were previously all over my small garden for several days now. That’s a welcome change because they had become quite a nuisance. I was hoping the product would help control them, and so far, I’m pleased with what I’ve observed.
I just wish I could say how long the effect will last. It’s still too early for me to make that judgement. I want to see whether the bagworms return after some time or whether the treatment provides longer-lasting relief.
For now, I’m happy with the initial results. The smell was dreadful, but at least I haven’t been seeing those irritating pests around my garden.
What I Like About Spectracide Malathion Spray
- Controls several listed garden pests.
- Specifically labelled for bagworm control.
- Concentrated formula for dilution.
- No bagworms spotted for several days after application.
What I Don’t Like
- Extremely harsh and unpleasant smell.
- Requires careful handling and preparation.
- Long-term effectiveness in my garden is still unknown.
Important Things to Know Before Using It
Although I’ve been happy with my initial results, this isn’t a product I’d encourage anyone to handle casually. Spectracide Malathion contains 50% malathion, alongside other ingredients that include an aromatic petroleum solvent. The manufacturer’s safety information warns users to avoid breathing the vapour or spray mist and to avoid contact with skin and eyes.
Wearing ordinary gloves and a face mask doesn’t necessarily provide all the protection required for pesticide application. The appropriate protective equipment and application precautions should come from the product label. Keep children and pets away during application and until the spray has dried.
The product label also gives specific dilution rates for different pests and plants. For bagworms on the listed flowers and bushes, it specifies one tablespoon per gallon of water. That doesn’t mean the same rate should automatically be used on every plant. Check the instructions for your particular plant before applying it.
There are also restrictions on how frequently it can be applied. For flowers and bushes, the label limits use to two applications per year, with at least ten days between treatments. It also warns about risks to bees and aquatic organisms, so avoid spraying flowering plants while bees are visiting and prevent runoff into drains or waterways.
One final thing: if you experience symptoms such as excessive sweating, unusual salivation, vomiting, breathing difficulties or muscle twitching after pesticide exposure, seek urgent medical attention and take the product container or label with you.
Is Spectracide Malathion Spray Worth It?
Based on what I’ve seen so far, I’m pleased with the product’s initial performance. Bagworms had become a persistent problem in my garden, and I haven’t seen them for several days since applying the spray. However, I would like to observe the garden for longer before making a final judgement about how effective or long-lasting the treatment is.
The smell is another drawback. It’s genuinely unpleasant, and handling the concentrate requires care. This isn’t something I’d want to open casually or use without reading the instructions first.
Would I Recommend Spectracide Malathion Spray?
For someone dealing with bagworms or other pests specifically listed on the product label, I’d consider it an option worth looking into.
My initial experience has been positive, and I’m glad to see a reduction in the bagworm problem that was bothering me. However, I’d only recommend using it if the pest and plant are covered by the label and the application instructions can be followed properly. I wouldn’t recommend it to anyone looking for a casual, everyday garden spray that can be used without much preparation. It is a pesticide concentrate that needs to be handled responsibly.
Alternatives to Spectracide Malathion Spray
If you’re looking at other ways to control bagworms and similar caterpillar pests, here are some alternatives worth researching:
- Bonide Thuricide BT
- Monterey B.t.
- Bonide Captain Jack’s Deadbug Brew
- Garden Safe Insecticidal Soap
Conclusion
Spectracide Malathion Spray has made a good first impression on me. The smell is absolutely dreadful, and I certainly won’t be making the mistake of putting my nose near the bottle again. But I’ve been pleased with the initial results in my garden.
The bagworms that had been bothering me haven’t been visible for several days, which is exactly the kind of change I was hoping to see. My only remaining question is how long that result will last. I’ll need more time to determine whether the pests stay away or eventually return.
For now, I’m happy with how things are looking in my little garden, even if using this product was one seriously unpleasant-smelling experience.
Also read my similar review of the Pest Defence Ultrasonic Pest Repeller
