Mosquito Insecticides?

[EricSJCA]

If the mosquito control truck shows up some night in our neighborhood, spraying Zenivex E4 or Merus 3.0 in the air,
is it likely to harm tarantulas, millipedes, silkworms, roaches, isopods, or springtails?
They said they use "materials that do not harm non-target species."

https://vector.sccgov.org/sites/g/files/exjcpb676/files/document/WNV%20General%20FAQs%20Final%20Aug%202023_0.pdf?mc_cid=89579dd6a3&mc_eid=d997433ed3

 

[HooahArmy]

Good day! Chemist and toxicologist here!
Both of those chemicals are known as 'pyrethroids', meaning they mimic the natural pesticidal compounds within chrysanthemum flowers. The toxicity level has been documented to be low for mammals and other vertebrates, but you bring up a good question with inverts.
When mosquito control sprays, they are likely hitting hot spots where the skeeters like to lounge, like in shady areas, damp niches, or where water hangs out. Mosquitoes need to make contact with it to become poisoned, so any pal you might have safe and far away in a home will be alright. The concentrations required to target a skeeter is also low, given their small bodies, and the chemical compound may also have ingredients added to target mosquitoes in particular-- No spray team wants to take out the local wildlife too!
However, to ensure that any invert pals of yours are safe, keep windows and doors closed while the spraying is happening and keep them closed for about a week, just to keep on the safe side. If you go outdoors and walk through grass or any other natural areas, change your clothing and thoroughly wash your hands before handling or engaging with any invert pals. Monitor your critters' behaviors as well. If you see smaller guys like springtails, isopods, or roaches behaving as if they are ill or are dying, move them to a clean and secluded area like a closet. Larger pals like Ts and Pedes may require an enclosure cleaning in case you see them acting oddly... but most likely, your pals are too large, of the incorrect species, or too far away from the pesticide deposit site to be intensely affected.

Feel free to ask of anything else!

 

[EricSJCA]

...When mosquito control sprays, they are likely hitting hot spots where the skeeters like to lounge, like in shady areas, damp niches, or where water hangs out. Mosquitoes need to make contact with it to become poisoned, so any pal you might have safe and far away in a home will be alright. The concentrations required to target a skeeter is also low, given their small bodies, and the chemical compound may also have ingredients added to target mosquitoes in particular-- No spray team wants to take out the local wildlife too!
However, to ensure that any invert pals of yours are safe, keep windows and doors closed while the spraying is happening and keep them closed for about a week, just to keep on the safe side. If you go outdoors and walk through grass or any other natural areas, change your clothing and thoroughly wash your hands before handling or engaging with any invert pals. Monitor your critters' behaviors as well. If you see smaller guys like springtails, isopods, or roaches behaving as if they are ill or are dying, move them to a clean and secluded area like a closet. Larger pals like Ts and Pedes may require an enclosure cleaning in case you see them acting oddly... but most likely, your pals are too large, of the incorrect species, or too far away from the pesticide deposit site to be intensely affected.
Feel free to ask of anything else!

Actually, "District staff do not need access to your property. Once the insecticide is released from the truck-mounted machines, the microscopic droplets follow the air currents wherever they go. Some will go over the house and some will go around."
Closing the house a whole week would be painful in the summer. We don't have air conditioning, so our whole house fan sucks in the night air to keep us comfortable during the day.

We do get warnings, though. I suppose I could sacrifice a sample of roaches and isopods to be exposed in the front yard that night and see how they do the next morning. I'll try to find some spider webs in the front yard to see if they survive the spraying.
I remember as a kid when they used to spray malathion for Mediterranean fruit flies. It seemed like all the orb-weavers disappeared for years after that.

 

[Ultum4Spiderz]

Pesticides don’t must harm insects they harm people and mammals too although not deadly the poison can accumulate: so when there spraying stay indoors . You might catch a cold easier or feel dizzy when you’re in the vicinity of the spraying. But it mostly kills spiders , and insects that help the environment. Pest species are often immune to pesticides.

Actually, "District staff do not need access to your property. Once the insecticide is released from the truck-mounted machines, the microscopic droplets follow the air currents wherever they go. Some will go over the house and some will go around."
Closing the house a whole week would be painful in the summer. We don't have air conditioning, so our whole house fan sucks in the night air to keep us comfortable during the day.

We do get warnings, though. I suppose I could sacrifice a sample of roaches and isopods to be exposed in the front yard that night and see how they do the next morning. I'll try to find some spider webs in the front yard to see if they survive the spraying.
I remember as a kid when they used to spray malathion for Mediterranean fruit flies. It seemed like all the orb-weavers disappeared for years after that.

Actually, "District staff do not need access to your property. Once the insecticide is released from the truck-mounted machines, the microscopic droplets follow the air currents wherever they go. Some will go over the house and some will go around."
Closing the house a whole week would be painful in the summer. We don't have air conditioning, so our whole house fan sucks in the night air to keep us comfortable during the day.

We do get warnings, though. I suppose I could sacrifice a sample of roaches and isopods to be exposed in the front yard that night and see how they do the next morning. I'll try to find some spider webs in the front yard to see if they survive the spraying.
I remember as a kid when they used to spray malathion for Mediterranean fruit flies. It seemed like all the orb-weavers disappeared for years after that.

 

[viper69]

they could be in trouble