Does anyone know what the shelf life of a spray can of ant and roach killer
would be? Pyrethin based. I bought a can last summer and it doesn't seem to
be very effective. Would I be better off buying non-pyrethin based products
if I want to carry over from year to year. The same goes for wasp sprays.
You certainly don't want to use a can thats not going to kill anything.
According to OSU:
Shelf life. One should use fresh products whenever possible. Shelf life
of insecticide products is influenced by the formulation, the container
type, storage conditions (temperature and humidity) and time. As a
general rule, an unopened container stored at moderate temperature will
remain effective for 2 to 5 years after purchase. Over time, under poor
storage conditions, the formulation and/or active ingredient can
deteriorate. The formulation can separate or solidify, rendering the
material unsuitable for use. The only way to know for sure if the active
ingredient of a stored product is still effective is to mix and treat a
pest population in a limited area and monitor the results.
No. The insecticide is just a slow residual in infinitesimal dilution, and
is in there for marketing purposes and to make you feel like you got
something to justify the price.
The knock-down comes from the mineral spirits alone. I keep a Sure-Shot
sprayer of just that around, and it knocks 'em down just as well as the
"wasp killer". Kerosene, petroleum naphtha, or WD-40 works, too.
I live in Florida, so economical insect control is important. The po' folk
used to keep a rope soaked with kerosene across the door seal, to keep out
:) Does anyone know what the shelf life of a spray can of ant and roach killer
:) would be? Pyrethin based. I bought a can last summer and it doesn't seem to
:) be very effective. Would I be better off buying non-pyrethin based products
:) if I want to carry over from year to year. The same goes for wasp sprays.
:) You certainly don't want to use a can thats not going to kill anything.
I just sprayed a pyrethrin aerosal that has to be close to 7 years old
on a wasp nest and it worked as supposed to. Pyrethrin is only a contact
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