For years I thought that cold and frost are our biggest foe, but not any longer. With the indoor garden we can grow food even in -40 degrees. However, what turns out to be a real challenge is pests. Aphids, spider mites and scales can easily ruin an indoor or greenhouse garden. We mostly have to deal with aphids. Since we want to grow food as naturally as possible, any pesticide sprayed on the plants, or worse feed to the plants, is not an option. Today I want to share our experience controlling aphids with No-Pest strips.
Note: We are 100% against pesticides that kill on contact even if it is called a natural product. I think you agree that it is not a good idea to eat pesticides. That limits our options to almost none. No-Pest strips do not kill on contact, by using them we would not have to eat it. And we describe in this post how to use them without being exposed to the toxins. However, we are very aware that the No-Pest strips are highly toxic and should only be used in a desperate situation.
We have been struggling with aphids in the greenhouse and indoor growing room for years. It seems that it is almost impossible to grow anything in an enclosed room without them. The problem often escalates toward spring, when aphids just take over.
The other day, very frustrated with all the aphids, Jakob and I both remembered a pesticide we grew up with. On our little homestead back in the day flies and bugs could multiply to an unbearable number. After a hot and busy canning day the kitchen ceiling, windows and everything else would often be covered with all sorts of flying creatures. That was the time when mom would use her wonder spray and in as little as 20 minutes all of them would be gone. I still remember mom spraying some of it into the kitchen, and quickly closing the door after her. No one was allowed in there, and no one would even want to be in that room. The spray smelled so horrible that everyone knew, this is not good. After a short time mother would open the door and air out the room. Now it was safe to go in and clean all the surfaces from dead flies. A quick wipe made the kitchen clean and fresh, ready for a new day. This magic spray was called dichlorvos.
What is dichlorvos
Dichlorvos or 2,2-dichlorovinyl dimethyl phosphate (commonly abbreviated as an DDVP) is a organophosphate, widely used as an insecticide. Dichlorvos was developed from nerve gas agents after the end of World War II. Dichlorvos, like other organophosphate insecticides, acts on acetylcholinesterase, associated with the nervous systems of insects (Source Wikipedia).
This insecticide does not kill on contact, even though probably too, but through air. This is one of the big advantages of dichlorvos to many other pesticides that kill on contact. Because of that it could be safely used in a kitchen, food storage or growing area even though it is a real dangerous product. It’s toxicity also makes it not as widely available today as my moms spray bottle was back in the day.
Our search for dichlorvos only showed one product: No-pest strips. The active ingredient Dichlorvos in them is so low that the description recommends just hanging them into a room and making sure that you don’t spend more than 4 ours in that room.
Thanks! Personally I would rather spend one second with my moms spray bottle than 4 hours with this. So we had to find a way how to use our new find to control aphids.
Controlling aphids with No-Pest strips
The No-Pest strips are made with safety in mind. Still if used not properly in living, or worse sleeping areas there are high health risks. The low percentage of dichlorvos in the strips kind of keeps the danger but takes away the effectiveness. Since we still don’t want to breathe in any of it we had to find a way to use the strips without us having to inhale it.
First we tried to use a plastic blanket to enclose an area where the strips could do their magic (See picture above). After about 30 hours all the flies where gone. However a spider and some aphids survived. It was a partial success. Without the flying aphids we could take some further steps to clean out the room. We needed to enclose a smaller space with the No-Pest strip to get a killing effect on remaining aphids as well.
Our next trial was a 5 gallon bucket (See picture above). With a much smaller volume the aphids were gone after about 24 hours. To use just a few plants at the time is still a success I think. This way we can at least keep seedlings clean for a fresh start or save a precious plant if needed.
We put the plant into the bucket with the No-Pest strip making sure the strip does not touch the plant. The lid has to be air tight but light transparent. We do not want to kill the plant, just the aphids. A clear box would be great for this purpose, but for now we are using the bucket.
Here a close up of a basil plant with aphids before and after. The next day the after picture shows some dead aphids hanging on. The No-Pest strip worked well. Now the plant was washed with water and it continues to grow without those nasty pests.
Other ways to use the No-Pest strips
I can see our selfs using the strip in the growing room during the cold dark months just by hanging one or two into the room. This is the time when we spend very little time in there, just a quick check, harvest and that’s it. It could help to keep the pest at bay. Often things escalate when the aphids become airborne and just fly everywhere. It seems that the strips killed the flies first. This alone could be a big help alongside with washing off the plants with water and making sure there is not a colony growing anywhere.
Invasive plants could also go into quarantine in a small but light room (like a guest bathroom) for a few days with the No-Pest strip. Again, make sure it is an unused room, you don’t want to breathe it in. This would work great for perennials that are outside in the summer. Before taking them into the house or grow room, give them a time out with the strip.
Between controlling aphids with No-Pest strips, we seal the strips in a plastic bag, and store it away from people and pets. Do not take toxic pesticides lightly.
Now we would like to hear from you, have you ever used No-Pest strips in the greenhouse or growing room? What is your experience? Or maybe you have a better way to get rid of those nasty pests, please share in a comment below, this way we can all learn.