JPS58128302A - Method of dealing with overrun of ant - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of combating ant infestation. More particularly, the present invention provides for the use of the compound 1-((5-chlorobenter-4-ynyl)oxy]-4-phenoxybenzene, either as such or in the form of a suitable formulation. It's about how to deal with it.

Significant numbers of harmful ant species are distributed in all parts of the world, and the damage they cause can be found in a variety of areas. The damage caused by ants is, for example, in the agricultural field.
This is revealed when cultivated crops and food products are invaded, and cultivated land and pasture land become unusable.

Similarly, other severe damage caused by ants is found in residential areas, such as the erosion of wooden buildings and structures, and in veterinary and medical fields, where livestock and humans are stung.

The types of ants that are considered to be the most harmful are mainly P.
h*1dal*), afuenogaster (Apha@no
gamtsr), Messal (Msssmr), Oecophylla (Oecophylla), Macronisfide (Ma
cron is eho i do), Camponotus (Camponotus), Crematogaster (
Crematogast@r)s Iridomyrnex, Atta, Acp
It belongs to the genera Acromyrnex and Solenopsii.

However, it is the ants of the genus Threnobsis that are proving to be extremely difficult to eradicate in some of the southern states of the United States, where damage caused by ants has recently increased to an all-time high.

In the United States, this species of ants ([hari] is estimated to become unusable).

This type of damage includes the number of livestock killed by the venomous sting of the insects and the number of humans living near or traveling to areas infested with the insects and who are seriously harmed. Must be.

In fact, it has been reported that a significant number of humans have died from being stung by the insects and are highly sensitive to their venom.

In response to the infestation of the genus Ant, a polycyclic perchlorinated hydrocarbon compound called Mirx was used in the United States.

Despite the good results obtained with this compound, its residues were detected in breast milk and the compound was found to be carcinogenic and teratogenic, so the use of this compound was discouraged. was prohibited.

However, because the areas infested by these ants are still expanding, it was necessary to find a new active substance that is harmless to humans and poses no environmental pollution problem.

Belgian Patent No. 8771 owned by the applicant
No. 64 describes several compounds that have juvenile hormone activity on insects and are useful in combating insect infestations.

Among the compounds described in this Belgian patent, the present applicant has selected a compound of the following formula (1-((5-chlorobenter-4-ynyl)o)-4-phenoxybenzene C (hereinafter referred to as "compound ■") was found to have extremely high activity against ants. Moreover, this Compound I has very low toxicity to bleeding animals (in an acute toxicity test on rats, even when 9 was administered at 4,000 da/min, the mortality rate was 0), and in the standard test conducted, there was no sudden change! Since I was not introduced to Ahara,
It is suitable for use in combating ant infestations in environments with human or livestock access or in farmland.

Thus, the object of the present invention is to combat ant or termite infestation by spraying an effective amount of Compound I, either as such or in a suitable composition or in the form of a pest bait, at a site where ants are infested. The goal is to provide a way to deal with this.

Another object of the invention is to provide a composition suitable for combating ant infestations, comprising compound 11 as an active ingredient, in addition to an inert vehicle and other additives as optional ingredients. That's true.

For the eradication of ants, it is often necessary to also contact the ant larvae with the active compound. For this reason, it was found to be effective to prepare poisonous baits suitable for ants. The poisonous bait is then sprayed near the ant nest so that the worker ants draw the larvae into the nest to feed. It has also been found that Compound I is suitable for the preparation of this poison bait. Thus, another object of the present invention is to provide a bait containing Compound 1 and other additives as optional ingredients diluted with a nutrient that is palatable to ants.

In view of the fact that in order to eradicate the ant infestation it is also necessary to kill ant larvae, it is preferable to use the compounds in suitable compositions or in the form of poisonous baits in the method of treatment that is the object of the present invention.

According to standard formulation examples, the compounds of formula I as active ingredients are employed in compositions in the form of liquid concentrates or wettable powders or in the form of granular formulations.

In actual use, the composition is sprayed near or directly into the ant nest.

The latter application is made possible by the fact that nests are generally easily located.

The above composition contains a compound (1) as an active ingredient,
Standard inert carriers may be present, such as liquid to solid vehicles, surfactants, wetting agents, dispersants, antioxidants, and other additives used in agrochemical formulations.

Generally, the application of Compound I in the form of poison bait represents the most effective and efficient application method since, as mentioned above, it is also necessary to kill the larvae deep inside the ant cage. Also, since the larvae are fed by plow ants that gather nutrients outside the nest, poisonous baits are ideal for delivering active compounds to the larvae in a capillary manner.

A prerequisite for the active compound used in this treatment regime is that it must have a delayed action and not be repellent to ants.

Preparation of poison bait is carried out according to conventional formulation techniques. Thus, for example, the active compound can be added to honey, molasses, vegetable oil,
It can be mixed into liquid or semi-liquid edible substances such as protein decomposition products, or the compound can be dissolved in a suitable base that also serves as a nutrient source to produce solid edible substances such as freeze-dried liver, ground grains, etc. Can be sprayed onto substances.

Generally, poison baits consist of an edible substance of sugar-like or oily protein source and about α1-5% by weight of active substance.

In the practical application of the method of combating ant infestation according to the invention, the amount of active substance (Compound I) to be applied will vary depending on several factors. Such factors may include the degree of ant infestation and its form, the location of the infestation, the composition used and corresponding useful application means, climatic and environmental factors.

In general, when considering highly active compounds, 1 to 200 #/ha (preferably 10 to 20 g/ha) are used for agricultural applications.
ha) Alternatively, it is sufficient to use an amount of active substance in the range from about α50 to 50 m9 per ant colony.

In other applications, such as the protection of food and raw materials, a quantity known to be effective for that particular application is used, but the amount also depends on environmental conditions.

Compound I was also found to be effective against termite infestation. When considering the known behavioral, social organization and habitat analogies, and also the analogy between the damage caused by ants and the damage caused by termites, it is possible to address the ant infestation that is the object of the present invention. The methods and compositions and baits can be extended to combat termite infestations without significant modification.

The following examples are provided to further illustrate the invention.

Example 1 This example describes a field experiment conducted by the United States Department of Agriculture (USDA) in June 1981 in Mississippi on a natural infestation of ants of the genus Threnobosis.

Three areas of approximately 2 ha each were selected for permanent pasture not open to livestock. In each of these areas, o.
Five sub-areas were selected, each area being iha.

Next, the pre-gel defatted corn granules (
Several baits were prepared consisting of 70%), refined soybean oil (28% to 29%) and Compound 1 (2 to 1%).

Briefly, poison baits were prepared by mixing compound (1) into soybean oil and spraying the resulting solution onto corn granules kept under agitation in a mixer. The resulting poison bait was then applied by means of a granular formulation spreader mounted on a tractor.

In one area, poison bait containing 1% active ingredient (compound I) was used at a rate of 1.126 ky/ha (11.27 g/ha in terms of active ingredient), and in another (second) In the area, 1,01419 poison baits containing 2% active ingredient
/ha (2α2B converted to active ingredient)
g/ha).

A third area was left untreated to serve as a control.

By observing the movement of ants after treatment,
Treatment effects were evaluated.

Before treatment, each area was inspected and the ant nests were counted, and then an index (nest index) was assigned to the six nests based on the estimated number of worker ants and the presence or absence of their larvae.

Table 1 The population individual index was then determined for each area by multiplying the number of nests with a specific "nest index" by the nest index and then adding the resulting values.

By comparing the number of active nests and population index before and after the treatment, we were able to examine the effectiveness of the treatment.

The results obtained 13 weeks after the date of treatment are shown in the following table.

Example 2 Iridomyrnex 7mm 7, found throughout Italy.
(Iridomyrnex humills) %
The activity of Compound I was investigated in a field test conducted at the end of May 1979 in the Latina region with respect to ants, which can often cause significant damage due to (1)-f.

Within the marked area for this experiment, six groups of ants, each numbering in the thousands, were selected at appropriate distances from each other.

Then, a sugar solution having the following composition was prepared: white sugar
1ky water 11 Sodium benzoate 1.7 days Tartaric acid 1.2g Near each of the three ant pots, a suitably shaped container containing a sugar solution was placed that contained only ants but not bees.

One container containing the same sugar solution was placed near each of the other three ant cases, and a small amount of 2 tonne percent of Compound (2) dissolved in acetone had been added to the sugar solution in the container.

Six weeks after feeding the sugar solution, each ant group was examined for population size.

The control ant worms that were given a sugar solution that did not contain the compound sea urchin had a large number of individuals and were dense, but the ants that were given a sugar solution that contained the compound ■ had only about 20 to 30 individuals, and there were no larvae. Since the absence of was observed, it was considered to be extinct.

The test method and results are summarized in the table below.Example 3 In this example, we conducted a test on the termite [Busamotermes hypos-r.
(Psammotermes Hypostoma
) Activity test of Compound I against ) is described. This P
The evaluation of the compound sea urchin against button ants belonging to the species Hypostoma was carried out by the following two methods. Knee film method: Compound I was dissolved in acetone at a constant concentration, and the resulting solution was sprinkled on the agar surface of a Petri dish. After drying, worker ants (termites) as described above were placed on it.

One mixing method: Compound (1) in solution form was mixed with dissolved agar, and then the worker ants (termites) as described above were placed thereon.

For each test method, four concentrations were used in each replicate test, and 50 termites were used in each replicate test. Soldier ants were not observed. Termite mortality was recorded at 1, 8, 15 and 22 days after treatment.

The results are shown in the table below.

Table 4

Claims (1)

[Scope of Claims] 1. An effective amount of a compound having the following formula, either as such or in the form of a suitable composition or poison bait, to a place where ants or termites are infested. How to deal with termite infestation. 2. The method according to claim 1, which is applied to deal with ants of the genus Solenopmim. 5. A composition suitable for combating ant or termite infestations, comprising as active ingredient a compound having the following formula, in addition to an inert carrier and other additives as optional ingredients. 4. The composition according to claim 2, which is applied to combat ants of the genus Thulenobsis. 5. A poisonous bait suitable for combating ant or termite infestations, with as active ingredient a compound having the formula:
Poison baits containing desirable nutrients for ants or termites and other additives as optional ingredients. & The poisonous bait according to claim 5, which is applied to deal with ants of the genus Tulenobsis.