JPS58134004A - Fungicidal composition for agricultural use - Google Patents

Abstract

PURPOSE:To provide a fungicidal composition for agricultural use, having high adhesivity and fixability (rain resistance) and excellent controlling effect to orange canker, fairy ring spot, etc., by using a clathrate compound of copper 8- hydroxyquinolinate included in cyclodextrin as an active component. CONSTITUTION:A clathrate compund of cyclodextrin and copper 8-hydroxyquinolinate is prepared by mixing cyclodextrin and copper 8-hydroxyquinolinate at a ratio of 5:1-1:5, and the compound is used as an active component of the titled composition. The clathrate compound can be prepared by mixing and pulverizing (A) a cyclic oligosaccharide homologue prepared by treating starch with a specific amylase, i.e. cyclodextrin compsed of 6-8 D-glucose units bonded with alpha-1,4 bonds forming a ring and (B) copper 8-hydroxyquinolinate using an atomizer, roller mill, jet mill, etc., or mixing and stirring the components (A) and (B) in water.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pesticide sterilizing composition containing as an active ingredient a compound in which 8-hydroxyquinoline steel is clathrated with cyclodextrin. The control effect against canker diseases, black spot diseases, etc. has been significantly improved.

Copper roxyquinoline and combinations thereof have been used. However, since the occurrence of tangerine canker is closely related to rainfall, it is necessary that the sprayed chemicals remain on the leaves and fruit surfaces for a certain period of time and not be washed away by rainfall. Therefore, in order to effectively control canker diseases, it is important to improve the adhesion (rain resistance) of the active ingredient.

The present inventors created the present invention by focusing on the property of cyclodextrin to form an clathrate compound. That is, cyclodextrin is a cyclic olico-9-saccharide analog produced by the action of a certain type of amylase on starch, and is a compound in which 6 to 8 D-glucoses are cyclically linked with α-1,4 bonds, and the constituent D -Depending on the number of glucose molecules, they are called α, β, and γ-cyclodextrins. Cyclodextrin has a relatively hydrophilic property on the inside of its donut-shaped molecule,
When compounds with lipophilic groups coexist, they have the unique property of incorporating the lipophilic groups and forming various clathrate compounds.

In order to produce a compound in which 8-hydroxyquinoline steel is clathrated with cyclodextrin, the two are mixed and ground, or the two are stirred and mixed in a water bath and then cracked. For example, when 8-hydroxyquinoline steel and cyclodextrin are stirred and mixed in an aqueous solution, the viscosity increases as the stirring time progresses, but as shown in Table 1, the viscosity increases rapidly after about 2 hours, and about The increase in viscosity is small after 5 hours.
You can see the inclusion of jin.

This increase in viscosity is the same regardless of α, β, or γ-cyclodextrin, forming an inclusion compound. The blending ratio of cyclodextrin and 8-hydroxyquinoline steel is
The preferred range is 5:1 to 1:5.

Table 1 Stirring time and viscosity change Regarding the cyclodextrin formulation containing 8-hydroxyquinoline copper of Table 1 prepared in this way,
The relationship between rainfall and the residual amount of active ingredients is shown in Table 2.
The cyclodextrin clathrate preparation had less wash-off due to rain than the additive-free preparation and had better rain resistance.

Table 2 Residual amount of 8-hydroxyquinoline 4 steel on tangerine leaves (Also, 8-hydroxyquinoline copper (cyclodextrin)) As a result of improved adhesion and fixation of the preparations molded with IJ, □The following examples As shown in Figure 2, the control effect against canker and black spot was significantly improved.

(Example 1) 100 parts of β-cyclodextrin and 400 parts of water were added to 200 parts of an 8-hydroxyquinoline bronze statue (929 g) and mixed with stirring for 5 hours.

(Example 2) 500 parts of β-cyclodextrin and 400 parts of water were added to 100 parts of 8-hydroxyquinoline bronze statue (9296) and mixed with stirring for 5 hours.

(Example 3) 100 parts of β-cyclodextrin and 200 parts of water were added to 100 parts of 8-hydroxyquinoline bronze statue (92%) and mixed with stirring for 5 hours. The viscosity of α,γ-cyclodextrin also increases.

(Example 4) 100 parts of β-cyclodextrin and 400 parts of water were added to 500 parts of 8-hydroxyquinoline bronze statue (92%) and mixed with stirring for 5 hours.

(Example 5) 8-Hydroxyquinoline steel i-body (92%) Zo.

and 100 parts of β ~ cyclodextrin were mixed using a ribbon mixer and then ground using an atomide.

(Test scissors method) Sekakan and Tsuku I La Orange ;! ! r1 ward 2 tree 5
1000 ppm of the drug tested twice on June 9th and June 10th
A concentrated chemical solution was sprayed, and on July 14th, for canker disease, the number of affected leaves was counted per 100 leaves per attack, and for black spot disease, the number of affected leaves per 15 fruits per tree was investigated according to the following criteria. In the table, the incidence rate of canker disease leaves and black spot disease are shown by the severity of the disease using the following formula.

a: The number of cases where the severity of the disease is low b: 〃 + #c:
I 〃 d:l+l+l Table 3 Controlling effect on mandarin canker and black spot As is clear from the above test results, the conventional canker-controlling effect of 8-hydroxyquinoline copper was not sufficient.
By including it in cyclodextrin, the pest control effect was significantly improved.

Patent Applicant Kyushu Sankyo Co., Ltd. Representative Patent Attorney Shoji Kashi Procedural Fukushosho (spontaneous) February 1, 1980 Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of Case 1988 Patent Application No. No. 16056 No. 2, Name of the invention: Pesticide disinfectant composition 3, Relationship with the person making the amendment Patent applicant's residence: Sankyo Co., Ltd., 1-2-58 Hiromachi, Honbunagawa-ku, Tokyo 1, Specification page 2, 13 Correct the line "hydrophilic" to "hydrophobic".

2. Change “in aqueous solution” to “in aqueous solution” in the third and last line from the bottom of the same zzj.
Underwater,” he corrected.

3. Correct the 3rd line from the bottom of page 2 to read "Mixing and pulverizing using a J'tr atomide, roller mill, crusher, jet mill, etc."

that's all

Claims (1)

[Claims] A good antiseptic composition containing as an active ingredient a compound in which 8-hydroxyquinoline steel is clathrated with cyclodextrin.