Pesticide strips for control of mites in honeybees
Pesticide strips used to control parasitic mites in honeybees. The pesticide strips are designed to have a lifetime or period of existence, after which the strip no longer exists in its original form. The strip breaks down, such as by disintegration, dissolving, decomposition, being eaten or carrier away, or otherwise degrading over time, so that at the end of the recommended lifetime, the strip is no longer in its original form. In most embodiments, at least 50% of the strip is no longer present, and in other embodiments at least 75% of the strip is no longer present. Preferably, at the end of the recommended lifetime, the strip no longer exists, at least the body of the strip that included the active ingredient. With this design, the strip does not provide extended low-dose pesticide that can be detrimental in treating the mites.
1. A pesticide strip for positioning in a bee hive, for mite control; the strips comprising:
(a) moisture degradable carrier matrix comprising poly(ethylene oxide) and,
(b) active ingredient comprising pesticide for mites;
(c) the carrier matrix being completely degradable in the hive and being sized to have a portion present in the hive, in use, for at least 21 days and to thereafter further degrade, the degradation being at a rate such that no more than 25% of the original carrier matrix is present after a selected time period from within the range of 45-60days.
2. The pesticide strip according to claim 1 wherein:
the strip has a thickness of no more than 0.5 mm, a length within the range of 6 to 12 inches; and, a width within the range of 0.25-2inches.
3. The pesticide strip according to claim 1 further comprising:
porous particulate in the carrier matrix.
4. The pesticide strip according to claim 3 wherein:
the porous particulate comprises particulate selected from the group consisting essentially of: silica, perlite, talc, and clay.
5. A pesticide strip according to claim 3 wherein:
the porous particulate comprises clay.
6. A method of providing an active ingredient to honeybees for mite control; the method comprising the steps of
(a) providing a strip comprising:
(i) moisture degradable carrier matrix comprising poly(ethylene oxide); and,
(ii) active ingredient comprising pesticide for mites;
positioning the strip in an occupied bee hive;
(b) (i) the carrier matrix being formulated to be completely degradable in the hive and so as to have a portion of the carrier matrix remaining when positioned in the hive for at least 21 days and the degradation being at a rate such that no more than 25% of the original carrier matrix is present after a selected time period from within the range of 45-60 days;
(c) ( leaving the strip in the hive at a location where it can be contacted by bees, for a period of at least 21 days.
7. The method according to claim 6 wherein:
the strip has a thickness of no more than 0.5 inch; a length within the range of 6 to 12 inches; and, a width within the range of 0.25-2 inches.
8. The method according to claim 7 wherein:
the step of providing a strip includes providing porous particulate in the carrier matrix.
9. The method according to claim 7 wherein;
the step of providing a strip comprises using, as the porous particulate, particulate selected form the group consisting essentially of: silica, perlite, talc, and clay.
10. The method according to claim 7 wherein:
the porous particulate in the carrier matrix is clay.