JPH01238506A - Antisoil plant viral fertilizer composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition, holding powerful infection preventing effects through application to soil and capable of providing also a fertilizer, by combining a heated urea aldehyde condensate having antisoil plant viral activity with a specific nitrogen-containing organic compound as an additive. CONSTITUTION:An antisoil plant viral fertilizer composition obtained by using a heated urea condensate having antisoil plant viral activity (hereinafter abbrevi ated to UACP, especially having chemical analytical values shown in the table) and one or more compounds selected from 2-oxo-4-methyl-6-ureidohexahydro- pyrimidin, 2-oxo-4-methyl-6-hydroxy-hexahydropyrimidine, 4-methylhydrouracil, beta-uracilbutyric acid, guanylurea, guanidine and thiourea as an additive in combi nation. The additive is preferably used at 1:0.1-100 weight ratio based on the UACP. All the above-mentioned compositions are decomposed in soil to exhibit fertilizer effects as a nitrogen fertilizer.

Description

[Detailed description of the invention] [Field of technology] The present invention relates to an anti-soil plant viral fertilizer composition.

More specifically, the present invention uses a heated urea aldehyde condensation product having anti-soil plant virus properties and a specific nitrogen-containing organic compound as an additive (for example, 2-oxo-4 methyl-6 ureido hexahydropyrimidine, etc.). The present invention relates to the composition.

[Prior art and its problems] DHT (2,4-
dioxohexahydrotriazine) is known. However, this drug may be insufficiently effective.

The present inventors are currently researching this problem, and have found that an elemental aldehyde condensation product (UAC
The present invention was made based on the knowledge that IJACP exhibits an anti-soil plant virus effect equal to or greater than that of the DHT mentioned above when used in combination with a specific fertilizer and fungicidal additive (for example, OMUP) described in detail later. Reached.

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 (11 to (2)).

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

2-oxo-4methyl-6ureidohexahydropyrimidine, 2-oxo-4methyl-6hydroxy-hexahydropyrimidine, 4methyl-hydrouracil, β
- uracil butyric acid, guanyl flare, guanidine and thiourea.

(2) The composition according to 'i4 (1) above, wherein the UACP has the following chemical analysis value.

Total nitrogen (TN) +39.2~3
6.5% urea nitrogen (ON) ・1.9-13
% Cold Water Insoluble Nitrogen (CW IN): 16.4-13
．． 7% hot water insoluble nitrogen (HW I N ): 13.6
~8.8%% The structure and effects of the invention will be described in detail below.

tlAcP used in the present invention can be synthesized by the following method. That is, 1 to 1.2 moles of urea and 2 moles of water are mixed with 1 mole of formaldehyde, the pH of the mixture is adjusted to 6F12, and the mixture is maintained at a temperature of 10° C. for about 4 hours. Subsequently, 1 to 1.2 urea of urea was added to the mixture after the holding.
Add moles to adjust the pH to 2 and keep at below 10°C for 4 hours.

The reaction mixture thus obtained was dried by evaporating water under reduced pressure at 50°C or lower, and the dried product was dried at 120°C.
Heat treatment to ~160° C. for 10 minutes to 10 hours, preferably 1 to 5 hours. Thus, a solid substance with the following analytical values (
UACP) according to the present invention is obtained.

Total nitrogen (TN): 39.2~3
6.5% urea nitrogen (UN): 1.9-1
．． 3% cold water insoluble nitrogen (CW IN): 18.4
~13.7% Hot water insoluble nitrogen (HWIM): 1
Note: 3.6 to 8.8% (all percentages are by weight) UACP is, of course, not a single compound, but consists of multiple urea aldehyde condensates. Therefore, its anti-soil plant virus effect is not due to a single compound, but is based on the composition, ie, on a plurality of condensates.

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

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

These compounds include 2-oxo-4methyl-6ureidohexahydropyrimidine (hereinafter referred to as OMUP);
2-oxo-4methyl-6hydroxy-hexahydropyrimidine (hereinafter OMUP) is a hydrolysis product of OMUP.
HP), 4-methyl-hydrouracil (hereinafter referred to as 4M
UH), β-uracil butyric acid and guanylurea,
It is a cyanamide derivative exemplified by guanidine or thiourea.

When these compounds are mixed with UACP, the other active ingredient of the present invention, and applied to soil, they dramatically improve the anti-soil plant virus properties of UACP. The above-mentioned compound group will be collectively referred to as "additive" hereinafter. The mixing ratio and mixing method of the additive and LIACP are not limited, but! The amount ratio of the additive to UACPI is 0.001 to 1000, preferably 0.1 to 10G.

Furthermore, the two may be mixed in advance in powder form, or may be mixed in the soil when applied to the soil.

However, regarding the usage ratio of cyanamide derivatives in the additive of the present invention to be mixed with UACP, considering its influence on vegetation, it should be It is desirable that the amount of sl is % or less.

Further, the form of the composition of the present invention is not limited to powder, but may also be in the form of granules, blocks, suspension in water, or the like.

Among the above-mentioned additives used in the present invention, the basic compound in the sense of starting materials is OMUP. The reason is that OMHP, JMHU, βUCA, etc. are produced in the process of OMUP being decomposed by a specific group of soil microorganisms (note: so-called OUMP-degrading bacteria).
This is because they all function as additives to UACP as well as OMUP.

On the other hand, among the above-mentioned additives, cyanamide conductors such as guanylurea, guanidine, or thiourea were also proved to be effective as additives as a result of experiments (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 the soil and exhibit fertilizing components as nitrogen fertilizers.

In particular, OMUP is a slow-release nitrogen fertilizer that is widely used in Japan, and is well known to have the effect of controlling the infection of soil-pathogenic filamentous fungi, mainly on vegetables.

However, the present inventors have now experimentally confirmed that it is effective as an additive for UACP.

The fertilizer composition of the present invention has antiviral efficacy and has a strong infection prevention effect against various viruses such as potato mosaic virus, tomato mosaic virus, tobacco mosaic virus, etc. when applied to soil. It holds the following. Therefore, by applying the fertilizer composition of the present invention to cultivated soil in advance, various viral diseases can be prevented.

The present invention will be explained below with reference to Examples.

Examples 1-7. Comparative Example 1.2 The anti-plant virus effect of the composition of the present invention against tomato mosaic virus was tested using UACP synthesized by the method described above and seven types of additives described below. As a comparative example, no treatment and UACP treatment alone were performed.

(i) Composition of experimental sample Tomato fungus (commercially available) was used as a test plant, and 5000
They were planted in pots with a size of 1/2 are, and a total of 15 plants were used, with 3 plants per pot in 5 pots per ward. The application amount of the test material (composition of the present invention) is as follows: UACP and OMUP per pot are as follows:
1.0 g of each and 0.5 g of other test materials (additives) were added to the soil at the time of planting tomato fungus and watered.

(11) Inoculum and inoculum The inoculum is tomato mosaic virus (TMU-tomato type), and the frozen material is thawed and ground, and 800 Methushka Borundum is used.
The sap was inoculated into three branches and leaves. Sufficient onset of the disease was observed in each test group.

) Tomato cultivation Tomato cultivation is carried out in early May, as described above (11).
The vaccination was carried out in late August. There are 9 studies on the effect of preventing the onset of disease.
It started in the beginning of the month and continued into the end of the month.

The cultivation was carried out in a glass room according to the standard tomato cultivation method.

[Investigation of M disease severity Investigating the disease severity, the mosaic symptoms that appear on the leaves are classified into healthy, small, medium, and healthy, according to the degree of manifestation.
They were classified into five levels based on versatility and expression, and after examining each individual leaf, the average value was calculated and summarized as shown in Table 1 below.

According to Table 1, UAPC has an infection control effect against tomato mosaic virus, and Zara is effective against UACP: ○MtJP, OMHP, 4MHU, β-UBA, guanylurea, and guanidine.

It is clear that each thiourea has an additive effect on infection control.

Reference example Fertilizer efficacy tests and tests showing that UACP is useful as a nitrogen fertilizer were conducted by cultivating Kirari bacteria in a 1/2,000 pot and harvesting Kirari in a greenhouse using the standard cultivation method for Kirari. We considered the amount. The test was conducted in triplicate, and the average yield was summarized. The amount of fertilizer to be applied is 2g of ammonium sulfate and UACP produced by the above method as nitrogen (N) per pot.
The total amount of phosphoric acid (P2O3) and processing (Ni20) were applied to all test plots as a total amount of 2 g as a base fertilizer. The yield of the harvested Kirari is as shown in Table 2 below.

Table 2 Comparison of the effectiveness of ammonium sulfate and UACP as nitrogen fertilizers (
Yield per potg) According to Table 2, UACP is recognized to exhibit the same or higher fertilizing effect as a nitrogen fertilizer than ammonium sulfate.

Additionally, OMU P and its decomposition products in soil have fertilizing effects as nitrogen fertilizers, and guanylurea, guanidine, and thiourea have fertilizing effects as lime nitrogen fertilizers and decomposition products of lime nitrogen chemical fertilizers, respectively. Both are publicly known.

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

that's all

Claims (2)

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