JPH0742209B2 - Suspended acaricide composition - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acaricide containing phospholipids and mineral oil as active ingredients, and further relates to a suspended acaricide composition containing a surfactant and water. Is.

[0002]

2. Description of the Related Art Conventionally, mineral oil emulsions or organic synthetic acaricides have been used as a control measure against spider mites. However, although there are many organic synthetic acaricides that are currently registered as pesticides for spider mites, the resistance of spider mites to these drugs has recently been manifested, and their effectiveness has been a problem. Further, as the effect decreases, the amount of spraying and the number of times of spraying increase, which may cause phytotoxicity on plants and naturally lead to environmental pollution. In addition, since mineral oil emulsions that have been used for a long time are used to control spider mites by physical action, it is generally said that resistance to chemicals is unlikely to occur. It is safe with few adverse effects, but there is a problem that it is poor in versatility due to restrictions on the time of use.
As a prior art relating to the acaricide containing phospholipid and mineral oil as active ingredients according to the present invention, which will be described later, Japanese Patent Application Laid-Open No. 56-14
0910 and JP-A-2-19309. However, the former describes the acaricidal activity of phospholipids alone, and the amount used is not limited. The latter describes reduction of chemical damage by adding phospholipids to mineral oil, and does not aim at acaricidal effect.

[0003]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention The present inventors have conducted studies to solve the above problem. When considering the control of mites, it is important to avoid drug resistance as well as acaricidal effect. The physical control method using a mineral oil emulsion is the most effective for that, and it has been used for a long time. However, mineral oil emulsions are restricted in use because they cause phytotoxicity of oil spots depending on the crop, and are mixed with other chemicals that are indispensable for pest control, and both phytotoxicity is promoted by spraying before and after. There is. As a means of removing those restrictions, naturally, a method of lowering the concentration of mineral oil components can be considered, but at the same time, the acaricidal effect is also reduced, which is not practical. As a result of diligent efforts to solve these problems, we focused on phospholipids that have some acaricidal effect even when used alone, and aimed to stabilize the acaricidal effect by adding a small amount of mineral oil to the extent that chemical damage does not occur. However, the active ingredient content of phospholipids and mineral oils was 4-6 parts by weight,
The latter 5 to 15 parts by weight, preferably 1 to 10
The present invention has been completed by discovering that a suspension composition formulated so as to be 4 parts by weight exhibits an acaricidal effect which cannot be considered from the concentration of both active ingredients. As is clear from the above description, the object of the present invention is to contain a phospholipid and a mineral oil more preferably as a surfactant, and there is no limitation in use, and the possibility of developing drug resistance is low. Another object of the present invention is to provide a miticide composition in the form of a suspension.

[0004]

The present invention has the following configurations (1) and (2). (1) A suspended acaricide composition in which 4 to 6 parts by weight of phospholipid and 5 to 15 parts by weight of mineral oil are mixed with water. (2) 4 to 6 parts by weight of phospholipid and 5 to 15 parts by weight of mineral oil,
A suspension-borne acaricide composition, which comprises 1 to 4 parts by weight of a surfactant and 75 to 90 parts by weight of water to make a total amount of 100 parts by weight.

The structure and effect of the present invention will be described in detail below. The compounding ratio of the phospholipid and the mineral oil, which are the active ingredients of the acaricide composition of the present invention, is 4 to 6 parts by weight of the former and 5 to 5 of the latter.
It is limited to 15 parts by weight, preferably 5 parts by weight of the former and 10 parts by weight of the latter. The reason for this is that while the mineral oil emulsion has an average diameter of 5 μm when diluted with water, it is a suspension in which mineral oil is dispersed in water by utilizing the surfactant action (emulsification action) of phospholipids. The composition has an average particle diameter of φ0.8 to 1.2 μm when diluted with water, and particles of mineral oil are dispersed very finely. As a result, it is considered that the adhesion to the surface of the worm body becomes uniform, a stable oil film is formed, and the worm body penetrates more quickly.

The phospholipids used in the present invention are not limited, but specific examples thereof include soybean phospholipids lecithin DX, Basis LP-20 and Basis LG-40.
S, Basis LG-10E (all are trade names of Nisshin Shin Oil Co., Ltd.), rapeseed phospholipids, safflower phospholipids,
Cottonseed phospholipids, egg yolk phospholipids and the like can be used.

The surfactant used in the present invention is added in a small amount in order to maintain the emulsion stability. The types thereof are nonionic surfactants, amphoteric surfactants, cationic surfactants and anionic surfactants. Any of ionic surfactants may be used, and it is not particularly limited. For example, Hymal 326H
(Matsumoto Yushi Co., Ltd.) can be used. The dosage form of the present invention may be a wettable powder or emulsion dosage form used by diluting with water at the time of use, but a suspension composition is preferable.

The present invention has the above-mentioned constitution, and mites to be controlled by this acaricide include apple mites, nymphal mites, kanzawa mites, citrus mites, red spider mites, red spider mites, clover spider mites, nice clover spider mites, smith Spider mites, white spider mites,
Examples thereof include spider mites such as mosquito mites, scab mites such as grape mites, scab mites, fungus mites such as citrus rust mites and grape rust mites, ticks and dust mites.

The acaricide composition of the present invention comprises phospholipids widely used in the fields of foods, cosmetics, etc. and mineral oil which has little adverse effect on humans and animals and natural enemies, and is compounded at a low concentration. By doing so, there are few restrictions on use such as chemical damage, so the versatility is wide, and it is safe for humans and animals and has little environmental pollution. Further, even if the phospholipid and the mineral oil are blended at a low concentration, the acaricidal effect due to the synergistic effect becomes very high as the blending ratio approaches 1: 2. The acaricide composition of the present invention also exhibits excellent efficacy as a bactericide.

[0010]

EXAMPLES The present invention will be described below with reference to Examples, Comparative Examples and Test Examples, but these do not limit the present invention. Examples 1 to 3, Comparative Examples 1 to 9 Machine oil 5 to 15 parts by weight (hereinafter, parts by weight are simply referred to as parts) and phospholipids (trade name: Basis LG-10E manufactured by Nisshin Oil Co., Ltd.) 1 7 parts was mixed in the compounding ratio of each example, and a preservative (trade name: manufactured by Proxel GXL ICI) was used.
After mixing 15 parts and 2 parts of Himal 326H (manufactured by Matsumoto Yushi Co., Ltd.) and adding the remaining amount of distilled water, glass beads (diameter 1
(mm) was added in the same amount as the preparation amount and mixed by a paint shaker for 15 minutes to prepare 100 parts of a suspension-form preparation.

Comparative Example 10 40 parts of machine oil and phospholipid (trade name: Basis LG-1
20 parts of OE Nisshin Oil Co., Ltd., 15 parts of an emulsifier (trade name: Emulgen 910 Kao Co., Ltd.), and cyclohexanone were mixed in the remaining amount to prepare 100 parts of an emulsion.

Reference Example 1 97 parts of machine oil and an emulsifier (trade name: Hymar 326H
3 parts of Matsumoto Yushi Co., Ltd. were mixed to produce 100 parts of emulsion.

Reference Example 2 6 parts of phospholipid (trade name: Basis LG-10E manufactured by Nisshin Oil Co., Ltd.), preservative (trade name: Proxel GX)
(Manufactured by LICI) 0.15 parts, and after adding the remaining amount of distilled water, add crow beads (diameter 1 mm) in the same amount as the preparation amount, mix with a paint shaker for 15 minutes, and prepare 100 parts of suspension preparation Was manufactured.

Test Example 1 Ten suspensions of the preparations obtained in Examples 1 to 3 and Comparative Examples 1 to 9 were prepared.
After diluting to 0 times, 5000 ml of sufficient amount was sprayed per one orange tree. Approximately one week after spraying, 4 per tree
The number of citrus red mite adults parasitizing five leaves was counted. The control efficiency 27 days after the application was examined.

[0015]

[Formula 1]

Cb: Number of parasitic mites before spraying in non-dispersed area Cai: Number of parasitic mites in i-th survey after spraying in non-dispersed area Tb: Number of parasitic mites in pre-dispersion area in scattered area Tai: In i-th survey after spraying in scattered area Number of parasitic mites

Table 1 shows the control effect against citrus red mite in Examples 1 to 3 and Comparative Examples 1 to 9 described above. Twelve cases were examined regarding the mixed concentration of phospholipids and machine oil components. Regarding the mixed concentration, the control efficiency tended to improve as the amount of machine oil component increased, but regarding the phospholipid, the most stable effect was exhibited at 5 parts by weight. From these results, when 5 parts by weight of the phospholipid and 5 to 15 parts by weight of the machine oil component, especially 10 parts by weight were mixed, the control efficiency was dramatically improved and a synergistic effect was observed.

[0018]

[Table 1]

Test Example 2 The suspension preparations obtained in Comparative Examples 3 and 6, Examples 1, 2, 3 and Comparative Example 9 were diluted 100 times, and Examples 1, 2 and 3 were 200 times and 400 times. After doubling the dilution, 5000 ml of sufficient amount was sprayed per one orange tree. The number of citrus red mite adults parasitic on 45 leaves per tree was counted at intervals of about 1 week after spraying. The control efficiency 21 days after the application was examined. The above Comparative Examples 3 and 6, Examples 1 and 2,
3 and Table 2 show the control effect against citrus red mite in Comparative Example 9. The dilution ratio of phospholipids and machine oil components was examined. As a result of diluting 100-fold, 200-fold, and 400-fold with respect to the mixed concentration considered to be promising in Test Example 1, phospholipid was 5 parts by weight + machine oil was 10 parts by weight.
A high control effect was shown up to double dilution. 5 parts by weight of phospholipids + 5 parts by weight of machine oil and 5 parts by weight of phospholipids + 15 parts by weight of machine oil also showed a higher control effect than other mixing ratios, but 5 parts by weight of phospholipids + machine oil. It was slightly inferior to 10 parts by weight. From these results, phospholipid 5
When 5 parts by weight and 5 to 15 parts by weight of machine oil component, especially 10 parts by weight were mixed, the control efficiency was dramatically improved even with 200-fold dilution, and a synergistic effect was recognized.

[0020]

[Table 2]

Test Example 3 The suspension preparation obtained in Example 3 was diluted 100-fold, and Comparative Example 1
The suspension-form preparation obtained from No. 0 was diluted 400-fold, and then 5000 ml per 1 tangerine tree was sprayed. The number of citrus red mite adults parasitic on 45 leaves per tree was counted at intervals of about 1 week after spraying. The control efficiency 21 days after the application was examined. Table 3 shows the control effect against citrus red mite in Example 3 and Comparative Example 10 described above. Test example 1,
As a result of comparing the effect in the field with the emulsion of the same ratio as the suspension formulation for the mixture ratio which seemed to be promising in 2.
The control efficiency of the suspension preparation was superior to that of the emulsion, and the suspension preparation seemed to be more promising.

[0022]

[Table 3]

Test Example 4 The suspension preparation obtained in Example 3 was diluted 100-fold, and 0.2 μι was added dropwise to each adult female of the citrus red mite, using a microsyringe. After dripping and drying, the life and death of the adult citrus red mite, female adult, was judged under a stereoscopic microscope, and the miticidal rate was examined. Table 4 shows the effect on the adult citrus mite female in the above Example 3. The acaricidal rate when phospholipids and machine oils were mixed was much higher than the acaricidal rate when phospholipids and machine oils were used alone in the same amounts as in Example 3, and the synergistic effect of mixing was high. Admitted.

[0024]

[Table 4]

Claims (2)

[Claims] 1. 4 to 6 parts by weight of phospholipid and 5 to 15 of mineral oil
A suspended acaricide composition in which a part by weight is mixed with water. 2. Phospholipids 4 to 6 parts by weight and mineral oil 5 to 15
A miticide composition in suspension, which comprises 100 parts by weight of a mixture of 1 part by weight, 1 to 4 parts by weight of a surfactant and 75 to 90 parts by weight of water.