JP5015456B2 - Granular fertilizer containing 2,6-dichlorobenzonitrile - Google Patents

Description

  The present invention uses a herbicide-containing granular fertilizer containing 2,6-dichlorobenzonitrile (hereinafter referred to as “compound 1”), thereby reducing phytotoxicity against Japanese turf and reducing the amount of compound 1 component. It relates to a method for controlling weeds in the turf during the period.

Conventionally, various studies on fertilizers containing agricultural chemicals have been made for the purpose of labor saving in farm work. As a method of attaching a pesticide to a fertilizer, a method has been reported in which the surface of a granular fertilizer is coated with a wax-like substance or a surfactant and the pesticide is contained in the wax-like substance or surfactant coating (for example, patents). Reference 1 to Patent Document 3). A method of coating the surface of granular fertilizer with a mixture of agricultural chemical and resin has also been reported (see, for example, Patent Document 4 and Patent Document 5). A method of coating these coated fertilizers with a resin for the purpose of solidifying the surface coating has also been reported (for example, see Patent Documents 6 to 12). Agrochemical-containing granular fertilizers in which granular fertilizer is impregnated or coated with an aqueous solution or aqueous dispersion containing an agrochemical active ingredient without using various additives as described above have also been reported (for example, Patent Documents 13 to Patents). Reference 14).

Japanese Patent Laid-Open No. 2002-308689 JP 2002-308690 A Japanese National Patent Publication No. 10-513148 JP-A-2-38393 JP-A-7-206564 JP-A-8-73291 JP-A-9-87077 JP-A-9-263475 JP-A-10-152387 JP 2003-81705 A Japanese Patent Laying-Open No. 2005-8470 JP 2000-191407 A JP 7-109192 A JP 2000-313685 A

It has been reported that as an agrochemical-containing granular fertilizer for turf, it is reported that an aqueous dispersion of a turf herbicide or fungicide component is coated on the granular fertilizer. Are "prodiamine-containing granular fertilizer" (for example, see Patent Document 15) and "dithiopyr-containing granular fertilizer" (for example, see Patent Document 16).
JP 7-109193 A Japanese Patent Laid-Open No. 7-118086

  On the other hand, Compound 1 is used as a herbicide for turf, and is known to have a high herbicidal power and a long period of herbicidal activity against the grass weeds that grow in autumn. However, since Compound 1 has a high vapor pressure, it is known that the herbicidal effect is extremely reduced from early summer to autumn when the temperature is high and the dry state continues for a long time. Moreover, it is known that drastic changes in the wiping power and the weeding period occur due to the dryness and wetness of the soil and the high and low temperatures in the autumn and winter periods when the temperature decreases. For this reason, under field conditions, it is the actual situation that a stable herbicidal effect is obtained by spraying more active ingredients than the minimum necessary amount of the compound 1 that exhibits a high herbicidal effect. However, in the turf, increasing the amount of Compound 1 more than the required amount and spraying can easily cause phytotoxicity to Japanese turf, and may cause phytotoxicity during the next spring germination. On the other hand, it has been reported that sparrows come to germinate upon awakening of seed dormancy due to ammonium sulfate, a nitrogenous fertilizer component.

Although there are many reports on the agricultural chemical-containing granular fertilizer for the purpose of labor saving in farm work, as described in Patent Documents 1 to 16, no report applied to Compound 1 has been made. The reason is considered that the above-described production method is not suitable for the compound 1 having a high vapor pressure because the treatment at a high temperature is necessary. Moreover, since the compound 1 is weak with respect to water, it is thought that the above-mentioned manufacturing method is not suitable. In addition, the annual annual weed that is an annual weed that occurs in autumn has a problem that it is hardly affected by the herbicide because it exists in the seed state in the season other than autumn.

The present invention provides a herbicide-containing granular fertilizer containing Compound 1 as an active ingredient, and stable herbicide with a small amount of active ingredient compared to a granule which is a preparation containing a normal Compound 1 against weeds generated in turf. It is an object to provide a herbicide-containing granular fertilizer that has an effect and has reduced phytotoxicity against Japanese turf and is highly safe against Japanese turf.

As a result of intensive studies to solve the above-mentioned problems, the present inventors sprayed a herbicide-containing granular fertilizer in which Compound 1 and fertilizer are mixed into Japanese turf, thereby withering against the sparrows that are generated in the turf. It has been found that the killing power is increased, and that it is possible to suppress damselfly for a long period of time, and further that the phytotoxicity of Compound 1 against Japanese turf that sprout the next spring is reduced, and the present invention has been completed. .

That is, the present invention contains at least two kinds of nitrogen and phosphoric acid, or nitrogen and potash, does not contain a coating adhesive and resin, and has reduced phytotoxicity against Japanese turf 2,6 -A granular fertilizer containing dichlorobenzonitrile. Further, the present invention contains at least two kinds of nitrogen and phosphoric acid, or nitrogen and potash, does not contain a coating adhesive and resin, and has reduced phytotoxicity against Japanese turf 2,6 -Using dichlorobenzonitrile-containing granular fertilizer, fertilizer fertilization and annual weed control on Japanese turf are performed by a single spray. Furthermore, the present invention is characterized by containing 2,6-dichlorobenzonitrile in the range of 0.1 to 10%, and the particle size of the granular fertilizer is in the range of 0.5 mm to 3 mm. .

  By spraying the granular fertilizer of the present invention in the turf, it is possible to increase the killing power with a small amount of components compared to the usual herbicide spray preparation for the weeds already generated in the turf. Furthermore, nitrogenous fertilizer causes dormancy awakening of weed seeds, so that germinable weed seeds germinate all at once, and all weed seeds that can germinate from the soil surface can be killed. The herbicide-containing granular fertilizer can be provided in which the herbicidal period is observed longer than the 2,6-dichlorobenzonitrile sprayed preparation and there is no phytotoxicity to Japanese turf.

Since the present invention does not contain a coating adhesive and resin, the coating process can be omitted, and there is no fear of adverse effects caused by spraying the adhesive or resin into the soil.

In the present invention, it is preferable to use a volatile organic solvent as the solvent in the step of impregnating granular fertilizer with 2,6-dichlorobenzonitrile. The reason is that 2,6-dichlorobenzonitrile has poor water resistance and sublimates when placed in a high temperature environment for solvent drying. In order to prevent sublimation of 2,6-dichlorobenzonitrile in the preparation, it is preferable to add a sublimation inhibitor. Examples of the sublimation inhibitor include inorganic compound powders such as white carbon and titanium oxide, nonionic surfactants such as polyoxyethylene, polyoxyethylene polyoxypropylene, and polyoxypropylene.

By spraying the granular fertilizer of the present invention in the turf, it has a small amount of active ingredients compared to normal herbicide granules, and has a high bactericidal and long-lasting power against the annual annual grass weed that sparrows are fallen in winter. The weed suppression period can be demonstrated and the phytotoxicity to Japanese turf can be reduced. Fertilizer application and annual weed control on Japanese turf can be performed with a single spray.

As the fertilizer component of the granular fertilizer of the present invention, a granular chemical fertilizer granulated as a commercial chemical fertilizer can be used. Examples include superphosphate lime, lime nitrogen, molten manure, ammonium nitrate, potassium nitrate, lime, urea, ammonium sulfate, potassium sulfate, and the like.

Examples of volatile organic solvents that dissolve 2,6-dichlorobenzonitrile and impregnate granular fertilizers include low-boiling ketones, low-boiling esters, low-boiling alcohols, and other low-boiling organic solvents. Those having low toxicity are preferred. Specific examples include acetone, acetonitrile, cyclohexanone, ethanol and the like.

Hereinafter, the present invention will be described in more detail with reference to examples.

[Preparation of Compound 1 Fine Granular Compound Fertilizer]
99 parts of powdered phosphorus Anri Kasei (chemical conversion with Sumitomo Batter) and 0.5 parts of compound 1 are dissolved in 10 parts of acetone, put into Newgra Machine (manufactured by Seishin Enterprise Co., Ltd .: granulator), and stirred at 450 rpm. did. Next, 20 parts of water was gradually added with stirring, and granulated to a particle size of 300 μm. Thereafter, 0.5 parts of white carbon was added, stirred for 10 minutes and dried to obtain a fine composite fertilizer of Compound 1.

[Preparation of Compound 1 Medium Granular Compound Fertilizer]
99 parts of powdered phosphorus Anri Kasei (chemical conversion with Sumitomo Batter) and 0.5 parts of compound 1 are dissolved in 10 parts of acetone, put into Newgra Machine (manufactured by Seishin Enterprise Co., Ltd .: granulator), and stirred at 450 rpm. did. Next, 20 parts of water was gradually added with stirring, and granulated to a particle size of 1000 μm. Thereafter, 0.5 part of white carbon was added, stirred for 10 minutes, and dried to obtain a medium granular composite fertilizer of Compound 1.

[Preparation of Compound 1 Large Granular Compound Fertilizer]
99 parts of powdered phosphorus Anri Kasei (chemical conversion with Sumitomo Batter) and 0.5 parts of compound 1 are dissolved in 10 parts of acetone, put into Newgra Machine (manufactured by Seishin Enterprise Co., Ltd .: granulator), and stirred at 450 rpm. did. Next, 20 parts of water was gradually added with stirring, and granulated to a particle size of 3000 μm. Thereafter, 0.5 part of white carbon was added, stirred for 10 minutes, and dried to obtain a large composite fertilizer of Compound 1.

Comparative Example 1 Preparation of Compound 1 Granules 2.5 parts of Compound 1, 30 parts of bentonite, 63.5 parts of clay, 1 part of Sorpol 5050, 1.5 parts of Sorpol 5060, and 1 part of Airroll CT-1L .5 parts was added, and the mixture was stirred for 20 minutes with a lykai machine. After that, 20 parts of water was added, extruded with a 0.7 mmφ horizontal extrusion granulator, and dried to obtain a granule of Compound 1.

[Weeding effect on turf weeds in the fall and winter season and phytotoxicity test 1]
In Ibaraki Prefecture, a 1m x 1m plot was made in the Noshiba field, which is undergoing customary growth management in late September, and sparrows were seeded in the plot.
In early October, the prescribed application rates of Compound 1 granular fertilizer prepared by the method according to Examples 1, 2, 3 and Comparative Example 1 and commercial prodiamine-containing granular fertilizer (trade name: Temanax) are uniformly distributed in the compartment. Sprayed on.
The leaf age of the sparrow camellia at the time of treatment was about 1 leaf at the highest leaf age.
The investigation was conducted to investigate the effectiveness of this drug by observing the degree of herbicidal effect against sparrow leaf caterpillar and the degree of phytotoxicity against fever 1 month after drug treatment, 3 months later, and 6 months after the next spring fawn.
The results are as shown in Table-1.

The weeding effect on the weeds in the turf was performed according to the following observation criteria.
0: No herbicidal effect is observed as in the untreated area.
1: The control effect of about 20% is shown with respect to an untreated area.
2: Shows a control effect of about 40% with respect to the untreated section.
3: About 60% of control effect is shown with respect to an untreated area.
4: Shows a control effect of about 80% with respect to the untreated area.
5: Complete death

The investigation of the degree of phytotoxicity on Japanese turf was conducted according to the following observation criteria.
0: Same as untreated zone (no effect)
1: There are slight phytotoxic symptoms 2: Degree of phytotoxicity is observed, but it is judged that there is no practical problem 3: Degree of phytotoxicity is observed, and it is judged that it is not practical 4: The phytotoxicity is enormous and cannot be used practically Degree of judgment 5: Degree of complete death due to phytotoxic symptoms

[Weeding effect on turf weeds in autumn / winter season and phytotoxicity test 2]
In Ibaraki Prefecture, a 1m x 1m plot was made in the Noshiba field, which is undergoing customary growth management in late September, and sparrows were seeded in the plot.
In early November, prescribed application rates of Compound 1 compound fertilizer and commercial prodiamine-containing granular fertilizer (trade name: Temanax) prepared by the method according to Examples 1, 2, 3 and Comparative Example 1 are uniformly distributed in the compartment. Sprayed on.
The leaf age of the sparrow camellia at the time of treatment was about 3 leaves at the highest leaf age.
The investigation was conducted to observe the effectiveness of this drug by observing the degree of herbicidal effect against sparrow leaf caterpillar and the degree of phytotoxicity against fever 1 month after drug treatment, 2 months later, and 5 months after the next spring fawn.
The results are as shown in Table-2.

[Weeding effect on turf weeds in the fall and winter season and phytotoxicity test 3]
In Ibaraki Prefecture, a 1m x 1m plot was made in the Noshiba field, which is undergoing customary growth management in late September, and sparrows were seeded in the plot.
In early December, the prescribed application rates of Compound 1 compound fertilizer prepared by the method according to Examples 1, 2, 3 and Comparative Example 1 and commercial prodiamine-containing granular fertilizer (trade name: Temanax) are uniformly distributed in the compartment. Sprayed on.
The leaf age of the sparrow camellia at the time of treatment was about 4 leaves at the highest leaf age.
The investigation was conducted to observe the effectiveness of this drug by observing the degree of herbicidal effect against sparrow beetle and the degree of phytotoxicity against fever 1 month after drug treatment, 2 months later, and 4 months after the next spring fawn.
The results are as shown in Table-3.

In October treatment, as shown in Table 1, it was shown that long-term weeds can be suppressed with a small amount of active ingredient compared to the granule shown in Comparative Example 1 against weeds that occur in the autumn and winter seasons, such as sparrow leaf catfish. It was.

Moreover, in December treatment, as shown in Table 3, withering power against weeds occurring in the fall / winter season is highly expressed with a small amount of active ingredient compared to Comparative Example 1, and phytotoxicity against wild buckwheat is reduced in the high dose treatment section. It has been shown.

By using a compound fertilizer containing compound 1, weeds were suppressed by controlling the occurrence of annual grass weeds in the turf in the fall and winter seasons from the turf for a long time after chemical treatment. It became possible to provide herbicide-containing granular fertilizer with high safety for Japanese turf. It can be applied to scenes where fertilizer application and annual weed control on Japanese turf can be done with a single spray.

Claims (8)

Contains 2,6-dichlorobenzonitrile, which contains at least two of nitrogen and phosphoric acid, or nitrogen and potassium, does not contain coating adhesives and resins, and has reduced phytotoxicity against Japanese turf Granular fertilizer. Claim 1, wherein the 2,6-dichlorobenzoyl nitrile-containing granular fertilizer, wherein the particle diameter of the granular fertilizer described above is in the range of 0.5 mm to 3 mm. The 2,6-dichlorobenzonitrile-containing granular fertilizer according to claim 1 or 2 , wherein the 2,6-dichlorobenzonitrile-containing granular fertilizer described above is used in a lawn of Japanese turf. In order to suppress sublimation of 2,6-dichlorobenzonitrile, a sublimation inhibitor selected from white carbon, titanium oxide, polyoxyethylene, polyoxyethylene polyoxypropylene and polyoxypropylene is added to the granules. The granular fertilizer containing 2,6-dichlorobenzonitrile according to any one of claims 1 to 3 , characterized by When 2,6-dichlorobenzonitrile is contained in the granular fertilizer, 2,6-dichlorobenzonitrile is impregnated into the granular fertilizer as a solution of a volatile organic solvent selected from acetone, acetonitrile, cyclohexanone, and ethanol , and then dried. The 2,6-dichlorobenzonitrile-containing granular fertilizer according to any one of claims 1 to 4, wherein the fertilizer is a granular fertilizer.   Contains 2,6-dichlorobenzonitrile, which contains at least two of nitrogen and phosphoric acid, or nitrogen and potassium, does not contain coating adhesives and resins, and has reduced phytotoxicity against Japanese turf A method of applying fertilizer to Japanese turf and controlling annual weeds with a single spray using granular fertilizer. The method of performing fertilizer fertilization and annual weed control on Japanese turf according to claim 6 , wherein the particle size of the granular fertilizer is in the range of 0.5 mm to 3 mm. In order to suppress sublimation of 2,6-dichlorobenzonitrile, a sublimation inhibitor selected from white carbon, titanium oxide, polyoxyethylene, polyoxyethylene polyoxypropylene and polyoxypropylene is added to the granules. characterized in that there, a method of performing fertilizer fertilization and first grade weed control against Japanese turf according to any one of claims claim 6 or claim 7 in a single spraying.