JPH027284B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides smoke containing S-n-n-butyl S'-paratertiary butylbenzyl N-3-pyridyldiocarboimidate (hereinafter referred to as "DENMAT" (registered trademark of Sumitomo Chemical)) and nitrocellulose as a heat-generating base. The present invention relates to a method for producing a formulation in which Denmato is stabilized and exhibits a high smoke rate. Denmart is a fungicide that is highly effective against powdery mildew on fruit trees and vegetables.It is originally a relatively stable compound from a physical and chemical standpoint, and is usually produced in the form of a single agent such as a powder, wettable powder, or emulsion. When the drug was used, the decrease in the active ingredient due to changes over time did not pose much of a problem. However, when Denmart is used as a smoking agent using nitrocellulose as a heat-generating base, the content of Denmart decreases significantly over time. That is, in a composition in which Denmart, nitrocellulose and diatomaceous earth are mixed at a ratio of 10:30:60, the residual amount of Denmart decreases to 20% or less after being left at 60° C. for two weeks. Also,
DENMART is easily decomposed or oxidized by heating, and therefore, when used as a smoke agent, the rate of conversion to smoke is low and a high pesticidal effect cannot be obtained. As a result of various studies to solve the above-mentioned drawbacks, the present inventors have discovered that a phenolic antioxidant or a mixture of a phenolic antioxidant and an alkali or alkaline earth metal salt is added to DENMART. to stabilize Denmark,
They have also discovered that the smoke conversion rate can be increased, and have completed the present invention. That is, the present invention provides nitrocellulose and S-
Adding a phenolic antioxidant or a mixture of a phenolic antioxidant and an alkali or alkaline earth metal salt to a smoking agent containing n-butyl S'-paratertiary butylbenzyl N-3-pyridyldiocarboimidate. This is a method for producing a sterilizing smoke agent characterized by the following. Examples of the alkali or alkaline earth metal salts used in the present invention include Na ₂ CO ₃ ,
_NaHCO3 , _Na2BO3 , _{K2HPO4 , CaCO3 ,}
It is MgCO ₃ etc., and when used, it is good to add 0 to 5%, preferably 0 to 3%. Examples of phenyl antioxidants include 2,6-di-butyl-4-methylphenol (hereinafter abbreviated as "BHT"), butylhydroxyanisole (hereinafter abbreviated as "BHA"), poly(2,2 , 4-trimethyl-1,2-dihydroquinoline), 6-ethoxy-1,2-dihydro-2,2,4-trimethylquinoline, 1-(N-phenylamino)-naphthalene, 2.2'-methylenebis(4-methyl -6-
Tertiary butylphenol), etc., and when used, it is recommended to add 0.1 to 7%, preferably 1 to 5%. For formulation, fillers such as clay, talc, diatomaceous earth, bentonite, kaolin, melamine, etc., and binders such as
CMC, starch, etc. can be used. These can be used in an appropriate amount of 10 to 65%, preferably 15 to 60%. Regarding stability over time in Danmart's smoke agent, it is effective to mix phenolic antioxidants or alkali or alkaline earth metal salts alone, but a synergistic effect can be obtained by adding both. . For example, as shown in Examples and Test Examples, in terms of smoke conversion rate, alkali or alkaline earth metal salts are only slightly effective when added alone, but phenolic antioxidants alone or both are effective. When mixed, a practically satisfactory smoke conversion rate and biological effect were observed. Next, examples of the composition of the present invention will be described in detail. Example 1 Denmart 10%, lower nitrocellulose 30%,
10% melamine, 5% CMC, 4% starch,
Mix and knead 1% Na ₂ BO ₃ , 2% BHA, and 38% diatomaceous earth, and granulate it. Example 2 Denmart 10%, lower nitrocellulose 30%,
10% melamine, 5% CMC, 4% starch,
Mix and knead ₂ % NaHCO3, 1% BHA, and 38% diatomaceous earth, and granulate it. Example 3 Denmart 10%, lower nitrocellulose 30%,
10% melamine, 5% CMC, 4% starch,
Mix and knead 2% Na ₂ CO ₃ , 1% BHT, and 38% diatomaceous earth, and granulate it. Example 4 Denmart 10%, lower nitrocellulose 30%,
Melamine 10%, CMC5%, starch 4%, BHA3
% and 38% diatomaceous earth are mixed and kneaded and granulated. Example 5 Denmart 10%, lower nitrocellulose 30%,
Melamine 10%, CMC5%, starch 4%, BHT2
% and 39% diatomaceous earth are mixed and kneaded and granulated. Example 6 Denmart 10%, lower nitrocellulose 30%,
10% melamine, 5% CMC, 4% starch,
Mix and knead 2% Na ₂ CO ₃ and 39% diatomaceous earth and granulate. Example 7 Denmart 10%, lower nitrocellulose 30%,
Mix and knead 10% melamine, 5% CMC, and 4% starch and granulate. The results of the abuse test, smoking rate measurement, and efficacy test of the smoke agent thus obtained are illustrated. Test example 1 Abuse test 50g of sample was wrapped in aluminum laminate and 60g
The sample was left in a constant temperature bath set at 40°C and 40°C for a certain period of time, and the content of Denmart in the sample was measured to determine the residual rate. The results are shown in Table 1.

【table】

[Table] Test Example 2 Smoke conversion rate measurement A sample was smoked in a room with an internal volume of approximately 5.8 ^m3 , and after the atmosphere was uniformly stirred by a fan, the room air was reduced to approximately 20 m3.
A pump is operated to pass Denmart into a glass tube filled with silica gel, and Denmato is adsorbed onto the silica gel. Next, Denmato was recovered from acetone and quantified to determine the smoke conversion rate. The results are shown in Table 2.

[Table] Test Example 3 Powdery Mildew Control Efficacy Test In a small plastic greenhouse with an internal volume of ^5m3 , potted cucumber seedlings were treated with smoke, and conidia of cucumber powdery mildew were inoculated onto the cucumber leaves under treatment. . After that, cultivation was continued for 14 days, and the severity of the disease was calculated using the following 6-stage disease index. The results of the survey are shown in Table 3.

【table】

[Table] Total number of leaves surveyed x 5

【table】

Claims (1)

[Claims] 1 Nitrocellulose and S-Normal Butyl S'-
A smoking agent containing paratertiary butylbenzyl N-3-pyridyldithiocarboimidate, characterized in that a phenolic antioxidant or a mixture of a phenolic antioxidant and an alkali or alkaline earth metal salt is added. A method for producing a sterilizing smoke agent.