WO2022079438A1

WO2022079438A1 - Insect control product

Info

Publication number: WO2022079438A1
Application number: PCT/GB2021/052664
Authority: WO
Inventors: Avijit DAS; Lakshay JOSHI; Anil Kumar MAKKAPATI; Bhagyasree MIRIYALA RAMESHBABU; Kunal Mukhopadhyay; Shanthakumar SHANMUGAM PERUMAL; Adeeti VERMA
Original assignee: Reckitt & Colman (Overseas) Hygiene Home Limited
Priority date: 2020-10-16
Filing date: 2021-10-14
Publication date: 2022-04-21
Also published as: AU2021359225A1; GB202019015D0

Abstract

The present invention relates to an insect control product comprising a support and a coating, said support being partially or totally coated with said coating, wherein said coating comprises: at least one filler; at least one smouldering agent; at least one binder; at least 0.08 wt.% of at least one pyrethroid, based on the total weight of the insect control product; less than 5 wt.% of at least one surfactant, based on the total weight of the insect control product; and less than 16 wt.% water, based on the total weight of the insect control product.

Description

Insect control product

The present invention relates to an insect control product, to a method for producing the insect control product, to a method for controlling flying insects, and to a use of the insect control product to control flying insects.

Background

Pyrethrins refers to a group of closely related esters extracted from the Pyrethrum flower (Chrysanthemum cinerariaefolium). These compounds are effective pesticides. Pyrethroids are any of several synthetic compounds chemically related to pyrethrin, having insecticidal activity. For example, permethrin is a synthetic pyrethroid useful for killing adult mosquitoes.

Pyrethroids tend to have a relatively low degree of toxicity to humans and animals and hence are desirable to use for pest control.

Aerosol formulations containing pyrethroids have the added desirability of effectively delivering small amounts of active ingredient due to the dispersion of the active ingredient and penetrating nature of an aerosol spray.

However, aerosols do not allow for the continuous release of active ingredients.

One way of releasing active ingredients continuously or semi-continuously during a certain period of time is by providing a composition in a container attached to an emanation device, as described in patent application WO 2013/144596 A1. However, the operation of such an emanation device requires electric energy and it can be a problem in, for example, rural areas.

Another way of releasing active ingredients is in the form of coils or sticks being formed from a combustible material which is shaped into a circular helix or rod, respectively. Included in the combustible material are one or more active ingredients. In general, mosquito coils and sticks comprise a coil or a substrate, respectively, impregnated with an active ingredient. The substrate is a material which can be ignited and will slowly burn. As the product burns, the active ingredients are emanated into the atmosphere by virtue of their volatility to repel and/or knock-down mosquitoes. In use, such coils and sticks will provide an effective level of the active ingredient in the atmosphere for an appropriate period of time. Typically, a coil is placed on a stand and burns over a period of two or more hours. Sticks are placed vertically in a holder which may be as simple as a bowl of sand. It is recognised that, while the use of volatile pyrethroids results in bite inhibition and possibly even temporary knockdown, the effect is not long lasting. This is mentioned in WO 2005/051078.

Current coils or sticks provide protection as long as they burn and their effect is not seen immediately, which means that people need to wait, for example 30 minutes before the coils or sticks start to repel and/or knock-down insects. Therefore, there is a need of an insect control product that provides protection, i.e. repels and/or knock-down insects, preferably flying insects, as soon as they are ignited, during the burning time and after they are not burning anymore.

The insect control product should be able to provide protection for example, during 4 hours after it has been ignited, meaning that it should provide protection during the whole night.

It is an object of the present invention to provide an insect control product comprising a support and a coating. This product repels and/or knocks-down insects, as soon as it is ignited, during its burning time and after it is not burning anymore. The protection it provides is of for example, at least 4 hours.

It is an object of the present invention to provide a method for producing an insect control product.

It is an object of the present invention to provide a method for controlling flying insects.

It is an object of the present invention to provide a use of an insect control product to control flying insects.

Summary of the invention

In a first aspect, the present invention relates to an insect control product comprising a support and a coating, said support being partially or totally coated with said coating, wherein said coating comprises: at least one filler, at least one smouldering agent, at least one binder; at least 0.08 wt.% of at least one pyrethroid, based on the total weight of the insect control product; less than 5 wt.% of at least one surfactant, based on the total weight of the insect control product; and less than 16 wt.% water, based on the total weight of the insect control product.

In one embodiment, said at last one pyrethroid is selected from the group comprising Transfluthrin, Metofluthrin, Prallethrin and combinations thereof; preferably wherein said at least one pyrethroid is selected from the group comprising Transfluthrin, Metofluthrin, and combinations thereof.

In another embodiment, said coating comprises: between 40 wt.% and 75 wt.% of said at least one filler, based on the total weight of the insect control product; preferably between 45 wt.% and 70 wt.%, more preferably between 50 wt.% and 65 wt.%; and/or between 0.01 wt.% and 1 wt.% of said at least one smouldering agent, based on the total weight of the insect control product; preferably between 0.05 wt.% and 0.5 wt.%, more preferably between 0.1 wt.% and 0.3 wt.%

In an embodiment, said coating comprises between 5 wt.% and 30 wt.% of said at least one binder, based on the total weight of the insect control product; preferably between 7 wt.% and 25 wt.%, more preferably between 10 wt.% and 20 wt.%; wherein preferably said at least one binder comprises jigat powder.

In another embodiment, said coating comprises less than 12 wt.% of water, based on the total weight of the insect control product, preferably less than 10 wt.%, more preferably less than 8 wt.%.

In an embodiment, said coating comprises between 0.08 wt.% and 2 wt.% of said at least one pyrethroid, based on the total weight of the insect control product; preferably between 0.15 wt.% and 1.5 wt.%.

In another embodiment, said coating comprises between 0.001 wt.% and 4 wt.% of said at least one surfactant, based on the total weight of the insect control product; preferably between 0.05 wt.% and 3 wt.%, more preferably between 0.1 wt.% and 2 wt.%, most preferably between 0.1 wt.% and 1 wt.%; and preferably said at least one surfactant is selected from the group comprising non-ionic surfactants, more preferably ethoxylated alcohols and ethoxylated alkyl phenols having the formula R¹(OCH2CH2)_nOH; wherein R¹ is an aliphatic hydrocarbon radicals containing between 10 and 24 carbon atoms or alkyl phenyl radicals in which the alkyl groups contain from 10 to 24 carbon atoms; and n has an average value of from 1 to 10.

In a further embodiment, said insect control product comprises between 15 wt.% and 25 wt.% of said support, based on the total weight of said insect control product.

In an embodiment, said coating further comprises between 1 x10'⁴ wt.% and 5x1 O'² wt.% of a bittering agent, based on the total weight of the insect control product; preferably between 2X 10^-4 wt.% and 1 X 10'² wt.%, more preferably 5X 10^-4 wt.% and 5X 10^-3 wt.%; wherein preferably said bittering agent comprises or consists of denatonium benzoate.

In a preferred embodiment, said insect control product has a weight of between 1.5 g and 4 g, preferably between 1.5 g and 3 g, more preferably between 1.6 g and 2.5 g.

In a preferred embodiment, said insect control product is in the form of an incense stick.

In an embodiment, said insect control product has a burning time of at least 45 minutes, preferably at least 50 minutes, more preferably at least 60 minutes.

In a second aspect, the invention relates to a method for producing an insect control product according to the first aspect, the method comprising the steps of: a) providing a support; b) providing a mixture comprising at least one filler, at least one smouldering agent, at least one binder, and at least one surfactant; c) mixing the mixture of step b) with at last one pyrethroid and water, to obtain a masala comprising between 30 wt.% and 60 wt.% water, based on the total weight of the masala, preferably between 35 wt.% and 55 wt.%, more preferably between 40 wt.% and 50 wt.%; d) partially or totally coating the support of step a) with the masala of step c); and e) drying the partially or totally coated support until the water-content of the partially or totally coated support is equal or less than 16 wt.% to obtain an insect control product comprising a support partially or totally coated with a coating comprising: o at least one filler; o at least one smouldering agent; o at least one binder; o at least 0.08 wt.% of at least one pyrethroid, based on the total weight of the insect control product; o less than 5 wt.% of at least one surfactant, based on the total weight of the insect control product; and o less than 16 wt.% water.

In one embodiment, the drying step e) is carried out at a temperature of less than 50 °C and a relative humidity of less than 50, preferably less than 45.

In a third aspect, the invention relates to a method for controlling flying insects, the method comprising burning the insect control product according to the first aspect or the insect control product obtained by the method of the second aspect; wherein preferably the flying insects are mosquitoes.

In an embodiment, the burning time of the insect control product is of at least 45 minutes, preferably at least 50 minutes, more preferably at least 60 minutes.

In a fourth aspect, the invention relates to the use of the insect control product according to the first aspect or the insect control product obtained by the method of the second aspect to control flying insects, preferably mosquitoes.

Definitions

The following definitions are used in the present application.

“Insect control product”, as used in the present application means: a product used as a means for directly or indirectly controlling, destroying, attracting or repelling insects.

“Bio-efficacy”, as used in the present application means: efficacy of an insect control composition or an insect control product to knockdown or kill a determined type of insects.

“Active ingredient” as used in the present application means: a component of an insect control product to which the intended effect(s) of the product is(are) attributed, such as controlling, destroying, attracting or repelling insects. “Burning time” as used in the present application means: time for which a product, for example, an insect control product, burns or smoulders before it is consumed or reaches a point were combustion cannot longer be supported.

“Incense stick” as used in the present application means: support partially or completely coated with a thick layer of a coating material comprising an active ingredient. The coating in the incense stick burns away with the support. The support can be made of for example, bamboo or paper.

“Landing and probing experiments”, as used in the present application means: experiments performed in a 20m³ chamber. For flying insects, 3-5 days old, overnight- starved, 50 free flying, lab bred female Culex quinquefasciatus mosquitoes were released inside the test and control chamber. Subsequently, a trained experimenter entered the test and control chamber for pre-assessment of mosquito readiness by exposing his/her lower limbs for 15 minutes. The insecticide product to be tested is ignited in the test chamber.

“Knock-down percentage” or “% KD”, as used in the present application means: the percentage of insects that after contact with a (sub)lethal dose of an insect control composition cannot move, take off or stand, with respect to the initial number of insects at the beginning of an experiment. The assessment of knock-down is made for different time points in 30 minutes at regular intervals (at 0, 1.5, 3.5, 5.5 and 7.5 hours post ignition)

“Transfluthrin” or “TFT”, as used in the present application means: pyrethroid insecticide having the chemical name (1 R,3S)-3-(2,2-Dichlorovinyl)-2,2-dimethyl-1- cyclopropanecarboxylic acid (2,3,5,6-tetrafluorophenyl) methyl ester.

“Metofluthrin” or “MFT”, as used in the present application means: pyrethroid used as an insect repellent having the chemical name 2,3,5,6-Tetrafluoro-4-(methoxymethyl) benzyl 2,2-dimethyl-3-(prop-1-en-1-yl) cyclopropane carboxylate.

“Prallethrin” or “PLT”, as used in the present application means: pyrethroid used as an insect repellent having the chemical name 2-methyl-4-oxo-3-prop-2-yn-1-ylcyclopent-2- en-1-yl-2,2-dimethyl-3-(2-methylprop-1-en-1-yl) cyclopropane carboxylate. Detailed description of the invention

The present inventors have observed that the insect control product according to the present disclosure is active against insects, not only shortly after it has been ignited and when it is burning, but also after it has stopped burning/smouldering. This product may have a burning time of at least 45 minutes; however, it would still be effective to control insects during, for example, 2 hours, or 4 hours, or 6 hours, or even 8 hours after the product has been ignited.

The burning time and the residual action after the burning time of the product according to the disclosure are influenced by different parameters, for example, the amount of pyrethroid, the amount of surfactant and the amount of water. The present inventors have observed that there is a synergistic effect between these parameters, and it is of paramount importance that the coating in the product comprises at least 0.08 wt.% of at least one pyrethroid, less than 5 wt.% of at least one surfactant, and less than 16 wt.% of water.

In one embodiment, said at least one pyrethroid is selected from the group comprising Transfluthrin, Metofluthrin, Prallethrin and combinations thereof; preferably wherein said at least one pyrethroid is selected from the group comprising Transfluthrin, Metofluthrin, and combinations thereof.

The coating may comprise between 0.08 wt.% and 2 wt.% of said at least one pyrethroid, based on the total weight of the insect control product; preferably between 0.15 wt.% and 1.5 wt.%. The fillers in the coating burn easily and thereby allow the release of the at least one pyrethroid from the product. The coating may comprise between 40 wt.% and 75 wt.% of said at least one filler, based on the total weight of the insect control product; preferably between 45 wt.% and 70 wt.%, more preferably between 50 wt.% and 65 wt.%. Said at least one filler may be selected from the group comprising wood, sawdust, cardboard, coconut shell, leaves, nutshells, jute, sugarcane bagasse, rice husks, and combinations thereof.

Smouldering agents increase the rate at which the product according to the invention combusts and thereby are able to control the rate at which the at least one pyrethroid is released from the product. The coating may comprise between 0.01 wt.% and 1 wt.% of said at least one smouldering agent, based on the total weight of the insect control product; preferably between 0.05 wt.% and 0.5 wt.%, more preferably between 0.1 wt.% and 0.3 wt.%. Preferably the smouldering agent comprises or consists of potassium nitrate.

Binders hold the ingredients of the coating together. The coating may comprise between 5 wt.% and 30 wt.% of said at least one binder, based on the total weight of the insect control product; preferably between 7 wt.% and 25 wt.%, more preferably between 10 wt.% and 20 wt.%. Said at least one binder may be selected from the group comprising starch, tamarind starch, tamarind kemal powder, guar gum, jigat powder and combinations thereof; preferably said at least one binder comprises jigat powder.

The coating may comprise less than 12 wt.% of water, based on the total weight of the insect control product, preferably less than 10 wt.%, more preferably less than 8 wt.%.

Surfactants promote the dispersion of the pyrethroids during the preparation of the insect control product; therefore, ensuring homogeneity of the pyrethroids in the coating. Furthermore, surfactants may influence the performance of the insect control product, for example, the burning time. Suitable surfactants include but are not limited to any one or a combination of anionic, cationic, zwitterionic, non-ionic and polymeric surfactants.

The coating in the insect control product of the present invention may comprise between 0.001 wt.% and 4 wt.% of said at least one surfactant, based on the total weight of the insect control product; preferably between 0.05 wt.% and 3 wt.%, more preferably between 0.1 wt.% and 2 wt.%, most preferably between 0.1 wt.% and 1 wt.%. The at least one surfactant is preferably selected from the group comprising non-ionic surfactants, more preferably ethoxylated alcohols and ethoxylated alkyl phenols having the formula R¹(OCH2CH2)_nOH; wherein R¹ is an aliphatic hydrocarbon radicals containing between 10 and 24 carbon atoms or alkyl phenyl radicals in which the alkyl groups contain from 10 to 24 carbon atoms; and n has an average value of from 1 to 10. In a preferred embodiment, said at least one surfactant is selected from the group comprising ethoxylated alcohols having the formula R¹(OCH2CH2)_nOH; wherein R¹ is an aliphatic hydrocarbon radical containing between 10 and 20 carbon atoms, preferably between 12 and 18 carbon atoms; and n has an average value of from 4 to 9, preferably between 5 and 8, more preferably between 6 and 8.

The product according to the invention may further comprise additives selected from the group comprising preservatives, colouring agents, perfumes, and combinations thereof.

The function of the preservative is to prevent the growth of mould and microorganisms that may otherwise affect the performance or appearance of the insect control product. Preferably, the preservative is present in the coating in an amount of at most 1 wt.%, based on the total weight of the insect control product; more preferably, between 0.1 wt.% and 0.5 wt. %. Suitable preservatives include but are not limited to sodium benzoate and potassium sorbate.

The colouring agent enables the support or the coating to be coloured for aesthetic reasons. Preferably, the colouring agent is present in the coating in an amount of between 0 wt.% and 5 wt. %, based on the total weight of the insect control product, more preferably between 0.1 wt.% and 0.5 wt.%. Suitable colouring agents include but are not limited to malachite green, carmoisine red, sunset yellow, and rhodamine B.

The presence of a perfume in the support or in the coating provide a consumer-friendly fragrance, for example, when the product is burned. Preferably, the perfume is present in the coating in an amount of between 0 wt.% and 5 wt.%, based on the total weight of the insect control product; more preferably between 0.1 wt.% and 2.5 %w/w. Suitable perfumes include but are not limited to joss powder, jasmine, essential oils or other floral oils or synthetic versions thereof.

In an embodiment, the insect control product comprises between 15 wt.% and 25 wt.% of the support, based on the total weight of said insect control product. The support may be a bamboo stick, or a stick made of paper. As previously mentioned, said support is partially or totally coated with said coating. By partially coated it will be understood that less than 100 % of the surface area of the support will be coated with the coating. For example, a partially coated support may have between 10% and 90% of its surface area coated with the coating, preferably between 20% and 80%, more preferably between 30% and 60%.

Bittering agents may be included in, for example, the coating, to minimise the risk of accidental consumption by humans, especially children. A suitable agent is denatonium benzoate. This is an extremely bitter tasting compound that at the optimum concentration will be highly distasteful to people. The coating may then further comprise between 1 *10' ⁴ wt.% and 5x1 O'² wt.% of a bittering agent, based on the total weight of the insect control product; preferably between 2x10^-4 wt.% and 1 xio^-2 wt.%, more preferably 5x1 O'⁴ wt.% and 5x1 O'³ wt.%; wherein preferably said bittering agent comprises or consists of denatonium benzoate.

In an embodiment, the insect control product has a weight of between 1.5 g and 4 g, preferably between 1.5 g and 3 g, more preferably between 1.6 g and 2.5 g.

In a preferred embodiment, the insect control product comprises a support and a coating, said support being partially or totally coated with said coating, wherein said coating comprises: between 50 wt.% and 65 wt.% of at least one filler, based on the total weight of the insect control product; between 0.1 wt.% and 0.3 wt.% of at least one smouldering agent, based on the total weight of the insect control product; between 10 wt.% and 20 wt.% of at least one binder, based on the total weight of the insect control product; at least 0.08 wt.% of at least one pyrethroid, based on the total weight of the insect control product; less than 5 wt.% of at least one surfactant, based on the total weight of the insect control product; and less than 16 wt.% water, based on the total weight of the insect control product; wherein said at least one surfactant is selected from the group comprising ethoxylated alcohols having the formula R¹(OCH2CH2)nOH; wherein R¹ is an aliphatic hydrocarbon radical containing between 12 and 18 carbon atoms; and n has an average value of from 4 to 9, preferably between 5 and 8, more preferably between 6 and 8; wherein said insect control product has a weight of between 1.6 g and 2.5 g; and wherein said insect control product comprises between 15 wt.% and 25 wt.% of said support, based on the total weight of said insect control product.

Preferably the insect control product is in the form of an incense stick.

In a preferred embodiment, the insect control product has a burning time of at least 45 minutes, preferably at least 50 minutes, more preferably at least 60 minutes.

In a second aspect, the invention relates to a method for producing an insect control product according to the first aspect, the method comprising the steps of: a) providing a support; b) providing a mixture comprising at least one filler, at least one smouldering agent, at least one binder, and at least one surfactant; c) mixing the mixture of step b) with at last one pyrethroid and water, to obtain a masala comprising between 30 wt.% and 60 wt.% water, based on the total weight of the masala, preferably between 35 wt.% and 55 wt.%, more preferably between 40 wt.% and 50 wt.%; d) partially or totally coating the support of step a) with the masala of step c); and e) drying the partially or totally coated support until the water-content of the partially or totally coated support is equal or less than 16 wt.% to obtain an insect control product comprising a support partially or totally coated with a coating comprising: o at least one filler; o at least one smouldering agent; o at least one binder; o at least 0.08 wt.% of at least one pyrethroid, based on the total weight of the insect control product; o less than 5 wt.% of at least one surfactant, based on the total weight of the insect control product; and o less than 16 wt.% water. The coating step d) can be performed, for example using an extruder machine.

By controlling the temperature and the relative humidity in the drying step e), the desired water content of less than 16 wt.% water, can be obtained in about 30 to 40 minutes.

The foregoing aspects may be freely combined with any of the foregoing aspects disclosed herein.

The invention will be further described, by way of example, with the reference to the following non-limiting embodiments.

Examples

Formulations

A comparative product is a coil comprising 0.1 wt.% of esbiothrin.

Formulations according to the invention were prepared by mixing all ingredients to obtain an extrudable masala having about 44.44 wt.% water, based on the total weight of the masala. A bamboo stick (i.e. a support) was subsequently coated with the masala using an extruder. The coated stick was dried in a drier at a temperature of less than 45 °C and a relative humidity of between 38 and 44 until the stick had a water content of equal or less than 15 wt.% based on the total weight of the coated stick. It will be understood that the obtained product is in the form of an incense stick. The weight of ach incense stick is between 1.8 g and 2.4 g. The general composition of an insecticide product according to the present disclosure is shown in Table 1.

Table 1. Base insecticide product

Five insecticide products were prepared considering the base insecticide product of Table 1. These insecticide products differ on the amount and type of active, and these are shown in table 2.

Table 2. Insecticide products

Performance tests Landing and probing experiments - mosquitoes The insect control products shown in Table 2 and the comparative product (coil comprising 0.1 wt.% esbiothrin) were tested in a 20m³ chamber to demonstrate their efficacy in inhibiting landing and probing of Culex mosquitoes (% Landing and probing - %LP).

In this case, the insect control product to be tested was ignited until the product began to turn into ash at the burning end. The flame was then fanned, leaving the product to smoulder. The total burning time was recorded. In addition, the %KD was measured. The %LP together with the %KD were determined after 30 minutes of having ignited the product (0 hour). This means that, for 30 minutes immediately after having ignited the product, the mosquitos were exposed to the vapours emanating from the insecticide product. At 30 minutes the %LP and %KD were determined.

After 1.5 hours of having ignited the product a new population of mosquitoes was introduced into the chamber; and the %LP and %KD were determined at 2 hours from the moment of ignition. This means that the mosquitoes were exposed to the (remaining) actives in the air for 30 minutes. New mosquitoes’ populations were introduced into the chamber after 3.5 hours of having ignited the product and the %LP and %KD were determined at 4 hours from the moment of ignition. The same was done at 5.5 hours (parameters at 6 hours) and at 7.5 hours (parameters at 8 hors). The results of these tests are shown in Table 4.

Table 4. Performance tests - Landing and probing - Kock-down

In table 4, 1.5 sticks of insect control product 5 was used in the tests. For the rest of the products only one stick or coil was used.

The results in table 4 show that insect control products according to the invention start working even during the first 30 minutes of having been ignited. This is not the case for the comparative product. Furthermore, the insect control products according to the invention remain effective against insects even after they are not burning anymore. Finally, the product of the invention has a better bio-efficacy than the comparative product.

For Insecticide product 7, the %KD and %LP were determined after 0, 10, 20, and 30 minutes of having ignited the product (0 hour). This means that, for 0, 10, 20 and 30 minutes immediately after having ignited the product, the mosquitos were exposed to the vapours emanating from the insecticide product. At 0, 10, 20, and 30 minutes the %LP and %KD were determined.

After 1.5 hours of having ignited the product a new population of mosquitoes was introduced into the chamber; and the %LP and %KD were determined at 90, 100, 110, and 120 minutes (2 hours) from the moment of ignition. This means that the mosquitoes were exposed to the (remaining) actives in the air for 0, 10, 20 and 30 minutes. The same was done at 3.5 hours, 5.5 hours and 7.5 hours. The results of these tests are shown in Table 5.

Table 5. Performance tests - Landing and probing - Kock-down after for insecticide product 7

The results in table 5 demonstrate that the insect control product according to the invention start working immediately after it has been ignited. Furthermore, the residual activity of the product is clearly shown by the %KD at 0 or 10 minutes of the mosquitoes’ population that is introduced at 1.5 hours or 3.5 hours.

Hence one or more objects of the present invention are achieved by the present which is further elucidated in the appended claims.

Claims

1. An insect control product comprising a support and a coating, said support being partially or totally coated with said coating, wherein said coating comprises: at least one filler, at least one smouldering agent, at least one binder; at least 0.08 wt.% of at least one pyrethroid, based on the total weight of the insect control product; less than 5 wt.% of at least one surfactant, based on the total weight of the insect control product; and less than 16 wt.% water, based on the total weight of the insect control product.

2. Insect control product according to claim 1 , wherein said at last one pyrethroid is selected from the group comprising Transfluthrin, Metofluthrin, Prallethrin and combinations thereof; preferably wherein said at least one pyrethroid is selected from the group comprising Transfluthrin, Metofluthrin, and combinations thereof.

3. Insect control product according to claim 1 or claim 2, wherein said coating comprises: between 40 wt.% and 75 wt.% of said at least one filler, based on the total weight of the insect control product; preferably between 45 wt.% and 70 wt.%, more preferably between 50 wt.% and 65 wt.%; and/or between 0.01 wt.% and 1 wt.% of said at least one smouldering agent, based on the total weight of the insect control product; preferably between 0.05 wt.% and 0.5 wt.%, more preferably between 0.1 wt.% and 0.3 wt.%

4. Insect control product according to any of the preceding claims, wherein said coating comprises between 5 wt.% and 30 wt.% of said at least one binder, based on the total weight of the insect control product; preferably between 7 wt.% and 25 wt.%, more preferably between 10 wt.% and 20 wt.%; wherein preferably said at least one binder comprises jigat powder.

5. Insect control product according to any of the preceding claims, wherein said coating comprises less than 12 wt.% of water, based on the total weight of the insect control product, preferably less than 10 wt.%, more preferably less than 8 wt.%.

6. Insect control product according to any of the preceding claims, wherein said coating comprises between 0.08 wt.% and 2 wt.% of said at least one pyrethroid, based on the total weight of the insect control product; preferably between 0.15 wt.% and 1.5 wt.%.

7. Insect control product according to any of the preceding claims, wherein said coating comprises between 0.001 wt.% and 4 wt.% of said at least one surfactant, based on the total weight of the insect control product; preferably between 0.05 wt.% and 3 wt.%, more preferably between 0.1 wt.% and 2 wt.%, most preferably between 0.1 wt.% and 1 wt.%; and wherein preferably said at least one surfactant is selected from the group comprising non-ionic surfactants, more preferably ethoxylated alcohols and ethoxylated alkyl phenols having the formula R¹(OCH2CH2)_nOH; wherein R¹ is an aliphatic hydrocarbon radicals containing between 10 and 24 carbon atoms or alkyl phenyl radicals in which the alkyl groups contain from 10 to 24 carbon atoms; and n has an average value of from 1 to 10.

8. Insect control product according to any of the preceding claims, wherein said insect control product comprises between 15 wt.% and 25 wt.% of said support, based on the total weight of said insect control product.

9. Insect control product according to any of the preceding claims, wherein said coating further comprises between 1 X 10'⁴ wt.% and 5x1 O'² wt.% of a bittering agent, based on the total weight of the insect control product; preferably between 2x1 O'⁴ wt.% and 1 X 10-² wt.%, more preferably 5x10^-4 wt.% and 5x10^-3 wt.%; wherein preferably said bittering agent comprises or consists of denatonium benzoate.

10. Insect control product according to any of the preceding claims, wherein said insect control product has a weight of between 1.5 g and 4 g, preferably between 1.5 g and 3 g, more preferably between 1.6 g and 2.5 g.

11. Insect control product according to any of the preceding claims, wherein said insect control product is in the form of an incense stick.

12. Insect control product according to any of the preceding claims, wherein said insect control product has a burning time of at least 45 minutes, preferably at least 50 minutes, more preferably at least 60 minutes.

13. A method for producing an insect control product according to any of the preceding claims, the method comprising the steps of: - 18 - a) providing a support; b) providing a mixture comprising at least one filler, at least one smouldering agent, at least one binder, and at least one surfactant; c) mixing the mixture of step b) with at last one pyrethroid and water, to obtain a masala comprising between 30 wt.% and 60 wt.% water, based on the total weight of the masala, preferably between 35 wt.% and 55 wt.%, more preferably between 40 wt.% and 50 wt.%; d) partially or totally coating the support of step a) with the masala of step c); and e) drying the partially or totally coated support until the water-content of the partially or totally coated support is equal or less than 16 wt.% to obtain an insect control product comprising a support partially or totally coated with a coating comprising: o at least one filler; o at least one smouldering agent; o at least one binder; o at least 0.08 wt.% of at least one pyrethroid, based on the total weight of the insect control product; o less than 5 wt.% of at least one surfactant, based on the total weight of the insect control product; and o less than 16 wt.% water.

14. Method according to claim 13, wherein the drying step e) is carried out at a temperature of less than 50 °C and a relative humidity of less than 50, preferably less than 45.

15. A method for controlling flying insects, the method comprising burning the insect control product according to claims 1-12 or the insect control product obtained by the method of any of the claims 13 or 14; wherein preferably the flying insects are mosquitoes.

16. Method according to claim 15, wherein the burning time of the insect control product is of at least 45 minutes, preferably at least 50 minutes, more preferably at least 60 minutes.

17. Use of the insect control product according to claims 1-12 or the insect control product obtained by the method of any of the claims 13 or 14 to control flying insects, preferably mosquitoes.