JP3148903B2 - How to control stem diseases of fruit trees - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to the application of a mixture of one or more compounds having antibacterial or bactericidal activity to stem disease pathogens of fruit trees and an adhesive to a lesion and its peripheral part. The present invention relates to a method for controlling stem diseases of fruit trees.

[0002]

2. Description of the Related Art As a typical disease of stem disease of fruit trees,
For example, apple rot, white rot, grape black rot,
There are stem diseases such as vine rot, late rot, pear branch blight, and blight. These pathogens include, for example, Valsa ceratosperma (Valsa cephalus), a kind of filamentous fungus in apple rot.
(ratosperma) is an important disease of apple caused by this fungus. Infections of this fungus cause the bark and trunk to rot, and the lesions that leave the damaged part widen, causing the apple tree itself to die in 2-3 years. It is.

[0003] Filamentous fungi that cause apple rot cause spores throughout the year, and these spores are scattered and adhere to and infect the apple tree. If the spores are generated in the apple producing area, they will cause serious damage. Tree cultivation is increasing, but if it occurs on dwarf trees, it can cause catastrophic damage. As preventive measures, old trees with weakened trees are susceptible to infection. Therefore, measures such as cutting down the old trees, spraying them on the stems of apples after harvesting, and taking other measures are taken to prevent the disease from occurring. As a countermeasure, a method of shaving off a lesion and its peripheral portion and applying a medicine is employed.

[0004]

However, even in a method for preventing or treating stem diseases of fruit trees represented by apple rot,
The cutting of old trees requires a great deal of labor, and the application of the chemicals to the resection and the application of the chemicals to the resection may not be able to obtain a sufficient effect due to the runoff of the chemicals due to rainfall.

[0005]

Means for Solving the Problems The present inventors have eagerly studied a method for controlling stem diseases of fruit trees which is rain-resistant, does not require much labor, can accurately achieve the intended purpose, and is effective for a long period of time. As a result of repeated studies, the present invention has been completed.

[0006] The present invention relates to a compound having antibacterial or bactericidal activity against a stem disease fungus in a lesion infected with a stem disease fungus of a fruit tree and a resected part around or around the lesion. Alternatively, a method of controlling a stem disease of a fruit tree by applying a mixture of two or more kinds and an adhesive. Examples of the stem disease of the fruit tree of the present invention include stem diseases such as apple rot, white rot, grape black rot, vine rot, late rot, pear branch blight, and blight blight. be able to.

Examples of the compound having antibacterial or bactericidal activity against stem disease fungi of fruit trees used in the present invention include, for example, diisopropyl 1,3-dithiolan-2-ylidenemalonate (generic name: isoprothiolane), 8-hydroxyquinoline copper Cis, trans-3-chloro-4- [4-methyl-2- (1H-1,2,4-triazol-1-ylmethyl) -1,3-dioxolan-2-yl] phenyl 4-chlorophenyl Ether (generic name: difenoconazole), methyl 1- (butylcarbamoyl) benzimidazole-2-ylcarbamate (generic name: benomyl), 1,2-di- (3-methoxycarbonyl-) 2-
Thioureido) benzene (general name: thiophanate-methyl), 1,1'-iminodi (octamethylene) diguanidine (general name: guazatine), machine oil, and the like, and the present invention relates to these compounds. The compound is not limited, and may be any compound having antibacterial or bactericidal activity against stem disease of fruit trees.

The adhesive usable in the present invention includes, for example, urea-based, melamine-based, phenol-based, and resorcinol-based adhesives.
Resin system, vinyl acetate resin emulsion system, α-
Olefin resin-based, aqueous vinyl urethane resin-based, natural or synthetic rubber-based adhesives for wood can be used,
Preferably, a vinyl acetate resin emulsion adhesive is used, but the adhesive is not limited to this, and any adhesive for wood may be used.

In the control method of the present invention, a drug in the form of a wettable powder, a flowable, an emulsion or the like containing a compound having an antibacterial or bactericidal activity as an active ingredient against stem disease of fruit trees can be used as it is or with water or the like. It may be diluted to a concentration, uniformly mixed with the adhesive, and applied to the lesion and its surrounding area or the excised lesion and its surrounding area with a brush or the like, and the active ingredient is dissolved or uniformly dispersed in the adhesive. By being dried and hardened after application, it is not affected by rain or the like, the active ingredient is gradually eluted into the lesion, and the effect is maintained for a long time.

The mixing ratio between the adhesive and the agent such as a wettable powder, a flowable or an emulsion containing the active ingredient is not particularly limited as long as it does not run off during application during use. , And may be in a paste shape.

[0011]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples.

Example 1 A lesion of apple rot of an apple tree was scraped off with a knife, and then the following chemicals were diluted to a predetermined concentration with water, mixed with a vinyl acetate emulsion-based adhesive, and the lesion site and its lesion were removed. It was applied to the periphery. One year after the application, the extent of the development of lesions and callus formation was examined, and judgment was made according to the following criteria. Judgment criteria Lesion development: 0: Completely cured. 1 ... Some progress has been made. 2. Clearly progress. Callus formation: 0 ... None. 1 ... Slightly recognized. 2 ... recognized throughout. 3: Very good. The results are shown in Table 1.

[0013] In addition, the following chemicals were used in the practice area. Working group 1: 8-hydroxyquinoline copper 80% wettable powder + vinyl acetate emulsion adhesive. Working group 2: 8-hydroxyquinoline copper 80% wettable powder + isoprothiolane 40% wettable powder + vinyl acetate emulsion adhesive. Working area 3: difenoconazole 10% wettable powder + vinyl acetate emulsion adhesive.

As shown in Table 1, it is clear that the control method of the present invention inhibits the development of lesions on apple rot and promotes callus formation for one year compared to the untreated plot. .

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-130801 (JP, A) JP-A-3-127703 (JP, A) JP-A-60-72809 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A01G 7/06 A01G 17/18

Claims (5)

(57) [Claims] 1. A dry curing after application with one or more compounds having antibacterial or bactericidal activity against stem disease pathogens of fruit trees.
A method for controlling stem disease of fruit trees, which comprises applying a mixture with an adhesive to be applied to a lesion of a tree and a peripheral part thereof. 2. The control method according to claim 1, wherein the compound having an antibacterial or bactericidal activity against stem disease pathogens of a fruit tree is diisopropyl 1,3-dithiolan-2-ylidenemalonate. 3. The method according to claim 1, wherein the compound having an antibacterial or bactericidal activity against stem disease pathogens of fruit trees is copper 8-hydroxyquinoline. 4. The method according to claim 1, wherein the adhesive is a wood adhesive.
The control method described in the section. 5. The control method according to any one of claims 1 to 4, wherein the stem disease of the fruit tree is apple rot.