JPH0439298B2 - - Google Patents

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD OF THE INVENTION The present invention relates to a method for controlling pests using poisoned baits containing fast-acting insecticides. Conventional technology Poison baits conventionally used for the purpose of controlling pests, especially ants, are made into powders or granules after being mixed with insecticides (main ingredients), pest attractants, other fillers, binders, etc. It is molded into a dosage form such as and placed in a place where pest control is desired. Problems to be Solved by the Invention However, when conventional poison baits are applied to ants using ordinary fast-acting insecticides, the ants that visit the poison baits take it back to their nests. Not only are they susceptible to death or poisoning symptoms, and they are unable to tell other individuals, especially other workers, where the poisoned bait is, but they also secrete alarm pheromones to warn them of danger. As a result, only a small number of worker ants were killed, and it was not possible to exterminate the entire ant colony. In addition to the above-mentioned fast-acting insecticides, various slow-acting insecticides have been researched and developed in recent years, but there is still no known agent that can sufficiently exert the expected pest control effect. Even if poison bait is prepared using slow-acting drugs as the main ingredient, they will not have any effect on nest collapse. As described above, conventional poison baits for controlling social pests such as ants have had the disadvantage that they can only exterminate a few pests and cannot destroy the entire nest. Means for Solving the Problems The present invention eliminates the drawbacks of the conventional pest control technology using poisonous baits and provides a new technology that can reliably destroy the entire nest. This pest control method is characterized in that, in controlling pests using a poisonous bait containing a sexual insecticide, a coagulant bait is used together with the poisonous bait. The poisoned baits that can be used in the method of the invention do not differ fundamentally from those containing previously known fast-acting insecticidal agents. That is, it is prepared by blending a fast-acting insecticide with an attractant and, if necessary, a filler, binder, coloring agent, etc. Typical fast-acting insecticidal agents include, for example, P. elegans extract, allethrin,
d-T-80-allethrin, phthalthrin, resmethrin, d-T-80-resmethrin, flamethrin, d-T-80-flamethrin, phenothrin,
Pyrethroid insecticides such as vermethrin, calclofos, dichlorvos, naled, diazinon,
Examples include organophosphorus insecticides such as siaphos, chlorpyrifos-methyl, marathon, trichlorfon, pyridafenthion, fenclofos, fenitrothion, and promophos, and carbamate insecticides such as propoxar. Various known attractants can also be used as attractants. Specific examples include animal and plant extracts, proteins such as casein, animal and plant powders such as cellulose powder, wood flour, and bark; sugar, honey, blackstrap molasses, fructose, sucrose, maltose, sugarcane juice, proline, etc. Sweet ingredients such as amino acids; Vegetable oils such as corn oil, castor oil, olive oil, soybean oil, rapeseed oil, and peanut oil; Others (3S, 4R,
6E, 10Z)-3,4,7,11-tetramethyl-trideca-6,10-dienal, (z)-9-hexadecenal, 2,5-dimethylpyrazine, 8-methyl-2,5-dimethylpyrazine , Z, E- or E, E-α-furanecene and the like can be exemplified. Additives that may be added as necessary include common ones such as fillers such as silica gel, silicic acid, diatomaceous earth, kaolin, and talc; binders such as iris simus, gum tragacanth, gum karaya, sodium carboxymethyl cellulose, methyl cellulose, and hydroxypropyl cellulose; Amaranth, erythrosine, rose bengal, acid red,
Lysol Rubin, Lake Red, Lysol Red, Rhodamine, Tetrachlorotetrabromofluorescein, Prillian Lake Red, Deep Maroon, Toluidine Red, Herringdon Pink, Fast Acids Magenta, Permaton Red, Eosin, Violamine, Brilliant Fast Scarlet, Permanent Red, Oil Red Examples include dyes and coloring agents such as Fastret. The poisoned bait described above is prepared according to a conventional method. For example, it is manufactured by mixing each component and shaping the mixture into a suitable formulation using a binder if necessary. The blending ratio and dosage form of each component can be selected arbitrarily, but it is usually preferable that the usage ratio of insecticides and attractants is 0.1 to 10% by weight for the former and 90 to 99.9% by weight for the latter. It is desirable that the amount of the agent be up to about 1/2 of the total weight of both of the above. In addition, the formulation can be in the form of powder, fine granules, granules, etc., and the particle size is generally about 0.8 to 3 mm.
A suitable thickness is preferably about 0.5 to 1.5 mm. In the present invention, it is essential to use a coagulant bait together with the above-mentioned poison bait, and only by using the coagulant bait in combination can the expected excellent pest control effect be achieved. The above-mentioned condensing baits are basically the same as the above-mentioned poison baits without the insecticide component, that is, attractants alone or mixed with fillers, binders, coloring agents, etc.; A sexual insecticide may also be added. Typical examples of slow-acting insecticides include molting hormones such as carbaryl, chlordane, DDT, boric acid, and ecdysone, antijuvenile hormones such as pricosen, and juvenile hormones such as methoprene, which are usually It can be added up to about 10% by weight, preferably in the range of 0.1 to 10% by weight, in poisoned baits. Furthermore, the above-mentioned coagulant bait contains a concentration of about 1/4 or less, preferably 1/50, of the concentration that normally exhibits insecticidal activity.
A fast-acting insecticide can also be added at a low concentration of ~1/4. When these slow-acting and fast-acting insecticides are mixed into a coagulant bait, the original effect of using the coagulant bait, that is, the ability of the target pest to carry the poison bait back to its nest without dying during transportation, is not hindered in any way. Therefore, the transported poison bait has an insecticidal effect on pests in the nest, and the coagulant bait itself, which is transported at the same time, can also have a slow insecticidal effect based on the combination of insecticides, which further reduces the destruction of the nest. It can be made certain. The above-mentioned condensed bait is prepared in a suitable form in the same manner as the above-mentioned poisoned bait. The form thereof is preferably a powder, fine granules, granules, etc. having the same particle size as the poison bait. In the method of the present invention, the above-mentioned poisonous bait and coagulant bait can be used in combination by mixing both baits in an appropriate form in advance,
Apply this mixture to appropriate areas where pest control is desired.
For example, in the case of ants, this is advantageously carried out by placing it near the nest to be controlled or along the path of worker ants, preferably within several meters from the nest, more preferably within about 1 meter. The above application can also be carried out by placing the poisonous bait and the condensing bait separately in the same suitable location without mixing them in advance, or by placing both baits in close proximity to each other. The ratio of combined use of poison bait and coagulant bait when applying this method is as follows:
Although it varies slightly depending on the composition of both drugs, the type of pest to be applied, the application area, etc., generally the range is 20 to 95% by weight of poisonous bait and 5 to 80% by weight of coagulant bait, preferably the former to 30 to 80% by weight of the latter. The ratio is 20 to 70% by weight, more preferably 40 to 70% by weight to 30 to 60% by weight.
The amount to be applied to the area where control is desired is determined as appropriate depending on the above combination ratio and the pest to be controlled, and there is no particular limit, but in the case of a normal ant nest, approximately 0.1 to 10 g of both agents combined is required to destroy a normal ant nest. It is usually sufficient to use about 0.2 to 2 g. The method of the present invention can be applied to various pests and can be expected to control the following, and particularly suitable target pests are, for example, wasps, paper wasps,
Examples include social pests such as bees such as honey bees (Japanese honeybees), black ants such as the Japanese giant termite, Japanese red ant, black-spotted brown ant, black wood ant, black brown ant, samurai ant, Japanese termite, and Japanese termite, and termites such as the Japanese termite and the Japanese termite. . Effects of the Invention According to the method of the present invention, the various pests mentioned above can be reliably controlled, and in particular, the nests of these pests can be destroyed. Examples Examples of the present invention will be described below. Example 1 (1) Preparation of poison bait Each component shown in Table 1 below was added in a predetermined proportion (parts by weight).
A predetermined amount (parts by weight) of a binder was added and granulated to prepare a poisoned bait in the desired form.

[Table] (2) Preparation of coagulant bait A coagulant bait having the formulation shown in Table 2 was prepared in the same manner as in (1) above using each component shown in Table 2 below.

[Table] (3) Test method Tests were conducted using the poisoned bait and/or coagulated bait prepared in (1) and (2) above according to the following method.
In addition, when using the poisoned bait and the coagulated bait in combination according to the method of the present invention, colorants of different tones were added to both agents in advance to serve as markers, and mixed granules containing these were used as the test agent. Ants (Japanese brown ants and Brown ants) were used as test pests, and 80 cm from each nest in the field was used.
A piece of paper (φ7 cm) was placed at an appropriate distance, and a predetermined number of grains (average weight of each grain of about 1 mg) of each test preparation was placed on it. The number of remaining grains of the test preparation was counted over time, and the value obtained by subtracting this value from the total number of test preparations was taken as the number of preparations carried into the nest by ants. The results of the above tests conducted separately using various test preparations are shown in Table 3 below. Table 3 also shows the results of visual observation of ants entering and leaving the nest 60 minutes after the start of the test and 1 day later.

【table】

[Table] However, in the test No. in the table, an asterisk (*) indicates that the brown ants were used as the test insect, and no mark indicates that the brown brown ants were used as the test insect.
From Table 3 above, poison bait single agent (Comparative Examples No. 8 to 13)
In this case, the number of particles carried into the nest is small, and when observed after 30 minutes, it is hardly carried around.However, by using coagulant bait in combination, the poisonous bait is also well transported, and the number of particles carried into the nest increases significantly. . When observing individual ants from the ant nest one day later, no ants were seen when the coagulant bait was used in combination, indicating that the control was successful. Furthermore, substantially the same results were obtained with the combinations of poison baits and coagulant baits shown in Tables 1 and 2 other than the combinations of poison baits and coagulant baits shown in Table 3 above. Furthermore, regarding Test Nos. 2 and 4 shown in Table 3 above, one week after the start of the test, the nests were dug up and the presence or absence of surviving ants was examined, and as a result, no surviving ants were observed. This also confirmed the control of ants, especially the collapse of their nests. Generally, when an ant discovers food, it carries the information back into the nest to inform its mates, and joins with other worker ants to guide them to the food source. When worker ants bring back poisonous bait, they may become infected with insecticidal poisoning on the way back, or behave abnormally within the nest, and these ants secrete alarm substances (pheromones), which are then used to feed on the bait. becomes inaccessible.
At this time, if the poisonous bait is mixed in, the ant that brings it back is completely normal and will transmit information about the location of the bait to many other worker ants, and will inevitably bring the poisonous bait back into the nest as well. The phenomenon noticeably increases,
In this way, the inherent insecticidal activity of the poisonous bait carried into the nest kills the ants within the nest, and the nest can be destroyed.

Claims (1)

[Claims] 1. A method for controlling pests, which comprises using a poison bait containing a fast-acting insecticide to control pests, and using a coagulant bait together with the poison bait.