JP2671002B2 - Anti-soil plant viral fertilizer composition - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to anti-soil plant viral fertilizer compositions. More specifically, the present invention relates to a urea aldehyde condensation heating product having anti-soil plant virus properties and a specific nitrogen-containing organic compound (eg, 2-oxo-4methyl-) as an additive.
6 ureidohexahydropyrimidine etc.).

[Prior Art and Its Problems] DHT (2,4-dioxohexahydrotriazine) is already known as an anti-soil plant viral agent. However, this drug may be insufficiently effective.

The inventors of the present invention have been studying this problem, and as an anti-soil plant virus agent, a urea aldehyde condensation heating product (hereinafter referred to as UACP) that has not been put into practical use because of insufficient effect yet.
The present invention was achieved by knowing that UACP exhibits an anti-soil plant virus effect equal to or higher than that of DHT described above when used in combination with a specific fertilizer / bactericidal additive (for example, OMUP) described in detail later. did.

As is clear from the above description, an object of the present invention is to provide a novel anti-soil plant viral fertilizer composition.

[Means for Solving Problems] The present invention has the following configurations (1) and (2).

(1) An anti-soil plant virus fertilizer composition comprising a urea aldehyde condensation heating product having anti-soil plant virus properties (hereinafter referred to as UACP) and one or more compounds selected from the following compounds as active ingredients.

2-oxo-4methyl-6ureidohexahydropyrimidine, 2-oxo-4methyl-6hydroxy-hexahydropyrimidine, 4methyl-hydrouracil, β
-Uracil butyric acid, guanylurea, guanidine and thiourea.

(2) The composition according to the above item (1), wherein UACP has the following chemical analysis value.

Total nitrogen (TN): 39.2 to 36.5% Urea nitrogen (UN): 1.9 to 1.3% Cold water insoluble nitrogen (CWIN): 16.4 to 13.7% Hot water insoluble nitrogen (HWIN): 13.6 to 8.8% Composition and effect of the present invention Will be described in detail below.

The UACP used in the present invention can be synthesized by the following method. That is, 1 mol of formaldehyde and 1 to 1.2 mol of urea and 2 mol of water are mixed, and the pH of the mixture is approximately 12
And hold at a temperature of 10 ° C for about 4 hours. Subsequently, 1 to 1.2 mol of urea is further added to the mixture after the holding to adjust the pH to 2, and the mixture is held at 10 ° C or lower for 4 hours.

The reaction mixture thus obtained was dried to dryness by evaporating the water under reduced pressure at 50 ° C or lower, and the dried solid was dried at 120 to 1
Heat treatment is performed at 60 ° C. for 10 minutes to 10 hours, preferably 1 to 5 hours. Thus, a solid product (UACP according to the present invention) having the following analysis value is obtained.

Total nitrogen (TN): 39.2 to 36.5% Urea nitrogen (UN): 1.9 to 1.3% Cold water insoluble nitrogen (CWIN): 16.4 to 13.7% Hot water insoluble nitrogen (HWIN): 13.6 to 8.8% Note. (% Is all weight%) UACP is of course not a single compound, but is composed of multiple urea aldehyde condensates. Therefore, its anti-soil plant viral effect is not due to a single compound, but to the composition, ie the multiple heats of condensation.

The effect is greatest when the above-mentioned four chemical analysis values are within the above numerical ranges, and is significantly reduced when any one or more of the chemical analysis values is outside the above-mentioned range. However, the manufacturing method is not limited to the above-described exemplary method.

Next, the compound which is the other component used in the fertilizer composition of the present invention will be described.

These compounds include 2-oxo-4methyl-6ureidohexahydropyrimidine (hereinafter referred to as OMUP), OM
2-oxo-4methyl-6hydroxy-hexahydropyrimidine (hereinafter referred to as OMHP), 4-methyl-hydrouracil (hereinafter referred to as 4MUH), β-uracilbutyric acid and guanylurea, guanidine or thiol, which are hydrolysis products of UP It is a cyanamide derivative exemplified by urea.

When these compounds are mixed with the other active ingredient of the present invention, UACP, and applied to soil, the anti-soil plant virus properties of UACP are dramatically improved. The above-mentioned compounds will be collectively referred to as "additives". The mixing ratio and mixing method of the additive and UACP are not limited, but the weight ratio is 0.001 to 1000, preferably 0.1 to 100 with respect to UACP1.

In addition, the both may be mixed in a powder form in advance, or may be mixed in the soil when applied to the soil.

However, regarding the usage ratio of the cyanamide derivative in the additive of the present invention to be mixed with UACP, considering the influence on the vegetation, it is 5 in relation to the total nitrogen amount of UACP and the cyanamide derivative in terms of the total nitrogen amount. It is preferably less than or equal to wt%.

Further, the form of the composition of the present invention is not limited to a powder form, and may be in a granular form, a lump form, a suspension state in water, or the like.

Among the above-mentioned additives used in the present invention, the basic compound in the meaning of a starting material is OMUP. What happens
OMUP is one of the specific soil microbial communities (Note.
OMHP, 4 in the process of degradation by OUMP-degrading bacteria
This is because MHU or βUCA and the like are produced, and they function as additives to UACP in the same manner as OMUP.

On the other hand, among the above-mentioned additives, cyanamide derivatives such as guanylurea, guanidine, and thiourea were proved to be effective as additives as a result of the experiment (see Table 1 below).

These additives can be used alone or in combination of two or more.

Another feature of the composition of the present invention is that both the UACP and the additive decompose in soil to show a fertilizing component as a nitrogen fertilizer.

In particular, OMUP is a slow-release nitrogen fertilizer widely used in Japan, and it is well known that it has an effect of controlling infection of mainly vegetables with soil-pathogenic fungi. However, it was experimentally confirmed by the present inventors that it is effective as an additive to UACP.

The fertilizer composition of the present invention has various antiviral effects, such as various viruses such as potato mozaic virus, tomato mozaic virus, tobacco mozaic virus, etc., and a strong infection-inhibiting effect through application to soil. To own. Therefore, by applying the fertilizer composition of the present invention to the soil in advance, various viral diseases can be prevented.

 The present invention will be described with reference to the examples.

Examples 1 to 7, Comparative Examples 1 and 2 The anti-plant virus effect of the composition of the present invention on tomato mosaic virus was tested using UACP synthesized by the above-described method and the seven additives described below. As a comparative example,
Untreated and treated with UACP alone.

(I) Composition of Experimental Samples Tomato seedlings (Toko system) were used as test plants, planted in 1/5000 ares pots, and 3 plants per pot were used for 5 pots per section, for a total of 15 plants. . The applied amount of the test material (the composition of the present invention) was 1.0 g for each UACP and OMUP per pot, and 0.5 g for each of the other test materials (additives). Irrigated in addition to soil.

(Ii) Inoculum and inoculum The inoculum is tomato mozaic virus (TMU-tomato system), and the frozen material is thawed and then ground, and 800 messi carborundum is used. , 3
Juice was inoculated into the branches and leaves. Sufficient illness could be seen in each test area.

(Iii) Tomato cultivation Tomato cultivation was planted in early May, and the above (ii)
Vaccination was carried out in late August. 9 investigations of disease control effect
It started from the beginning of the month and extended to the end. The cultivation was performed in a glass room in accordance with the standard cultivation method of tomatoes.

(Iv) Investigation of disease severity In the investigation of disease severity, the mozaic symptoms appearing on the leaves are classified into five stages in the order of soundness, slight expression, small grade, intermediate grade, and high severity according to the degree of their development. Then, after investigating all individual leaves, the average value was calculated and summarized as shown in Table 1 below.

Table 1 shows that UACP has an effect of controlling infection with tomato mozaic virus, and that UACP has OMU.
It is clear that P, OMHP, 4MHU, β-UBA, guanylurea, guanidine, and thiourea each have an additive effect on infection control.

Reference Example Fertilization test showing that UACP is useful as a nitrogen fertilizer: The test is to grow cucumber bacteria in 1 / 2,000 pot,
The yield of cucumber was examined in the house room by the standard cultivation method of cucumber. The test was conducted in triplicate, and the average yield was summarized. The amount of fertilizer applied was ammonium sulfate and UACP produced by the above method was applied as Chisso (N) to 2 g per pot as the basic fertilizer, and phosphoric acid (P ₂ O ₅ ), Kari (K ₂ O) was applied to all test plots. It was applied as a basic fertilizer to 2 g each. The harvest amount of the harvested cucumber is as shown in Table 2 below.

According to Table 2, it is recognized that UACP has a fertilizing effect as a nitrogen fertilizer that is equal to or better than ammonium sulfate.

In addition, OMUP and its degradation products in soil are
It is well known that they have a fertilizing effect as nitrogen fertilizers, and that guanylurea, guanidine and thiourea have a fertilizing effect as decomposition products of lime nitrogen fertilizer and lime nitrogen chemical fertilizer, respectively.

From the above Examples and Reference Examples, it is clear that the composition of the present invention is effective as a nitrogen fertilizer and anti-plant virus agent.

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Claims (2)

(57) [Claims] 1. An anti-soil plant virus fertilizer composition comprising a urea aldehyde condensation heating product having anti-soil plant virus properties (hereinafter referred to as UACP) and one or more compounds selected from the following compounds as active ingredients. 2-oxo-4methyl-6ureidohexahydropyrimidine, 2-oxo-4methyl-6hydroxy-hexahydropyrimidine, 4methyl-hydrouracil, β-
Uracil butyric acid, guanylurea, guanidine and thiourea. 2. The composition according to claim 1, wherein the UACP has the following chemical analysis value. Total nitrogen (TN): 39.2 to 36.5% Urea nitrogen (UN): 1.9 to 1.3% Cold water insoluble nitrogen (CWIN): 16.4 to 13.7% Hot water insoluble nitrogen (HWIN): 13.6 to 8.8%