Methods for treating arthropods
View Patent ↗Methods for treating arthropods comprising depositing at least one drop of a liquid formulation containing at least one surfactant on a solid surface of an arthropod at a contact angle sufficient to cause rapid and enhanced knockdown (KD) of the arthropod. The contact angle comprises an angle formed between a resting drop of the liquid formulation and the solid surface on which the drop rests measured, after a period of about 80 milliseconds (ms) or more from the time that a drop of the liquid formulation is deposited on the solid surface, at a contact point between a tangent line drawn on a liquid/vapor interface surface of the resting drop in contact with the solid surface and a tangent to the solid surface on which the drop rests.
1. A method of treating cockroaches comprising the steps of:
(a) providing an aqueous composition comprising an agent,
wherein the agent is a liquid surfactant,
wherein said liquid surfactant is 2,5,8,11 tetramethyl 6 dodecyn-5,8 diol ethoxylate; ethoxylated 2,4,7,9-tetramethyl 5 decyn-4,7-diol; or mixtures thereof, wherein the agent is present at a concentration of about 0.1% weight percent to about 1.5% weight percent and
wherein the agent forms a contact angle that is less than about 40° as measured with a Krüss DSA 100 tensiometer, such that the contact angle is formed by a resting drop of the liquid composition on a solid surface and rests for a period of greater than about 80 milliseconds after depositing;
(b) depositing at least one drop of the composition onto a solid surface of a cockroach; and
(c) causing the cockroach, with the at least one drop of the composition deposited thereon, to exhibit a rapid knockdown (KD), at a rate of about 80% within about two minutes or less after the at least one drop is deposited.
2. A method of treating cockroaches comprising the steps of:
(a) providing an aqueous composition comprising an agent,
wherein the agent is a liquid surfactant,
wherein said liquid surfactant is
wherein y=8; or
wherein y= 8 ; and mixtures thereof,
wherein the agent is present at a concentration of about 0.1% weight percent to about 1.5% weight percent; and
wherein the agent forms a contact angle that is less than about 400 as measured with a Krüss DSA 100 tensiometer, such that the contact angle is formed by a resting drop of the liquid composition on a solid surface and rests for a period of greater than about 80 milliseconds after depositing;
(b) depositing at least one drop of the composition onto a solid surface of a cockroach; and
(c) causing the cockroach, with the at least one drop of the composition deposited thereon, to exhibit a rapid knockdown (KD), at a rate of about 80% within about two minutes or less after the at least one drop is deposited.