JPH10117659A - Applying method for liquid pesticide for paddy rice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple and power saving method capable of easily applying a desired quantity of liquid pesticide at the target place of a paddy field. SOLUTION: A liquid pesticide for paddy is applied to a flooded lower paddy filed from the nozzle 9 of an accumulator application casing 1 like direct projection. The nozzle 9 is provided with a straight hole and a 0.5 to 3mm tip bore. The liquid pesticide is packed within the casing 1 and the handle 3 of the piston shaft of a pump 2 is vertically moved to add/accumulate pressure within the casing. Then by holding the casing and pulling the lever 7 of the casing 1 from the a levee, the liquid pesticide is applied to the target place of the paddy field as gathered chemical liquid stream from the nozzle 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel method for spraying a liquid agricultural chemical for paddy rice.

[0002]

2. Description of the Related Art Conventionally, as a method of spraying pesticides on paddy fields, solid granules are mainly sprayed. As a method of spraying liquid pesticides, a method of spraying a concentrated emulsion directly from a container to a paddy field by hand, A method of spraying from a drainage path using a water tippo type sprayer attached to a chemical solution container (JP-A-6-5463)
No. 8) and the like. The former method involves spraying into paddy fields, but paddy fields under flooded conditions are difficult to walk due to the soft ground, and it is hard work to spray chemicals. There is a disadvantage that. In addition, the latter method is a labor-saving method, as compared to a method of spraying in a paddy field, since the spraying is performed from the avenue. However, since this method is a method of spraying by repeatedly performing an operation of placing a finger on the trigger portion of the water tippo type sprayer and pulling the finger toward the user, hands and arms gradually become fatigued by repeating the operation. It has the disadvantage of coming.
In addition, the amount and distance of the chemical solution sprayed from the nozzle changes depending on the degree of triggering, and furthermore, when the trigger is triggered, the reaching distance of the chemical solution flow jumping out of the nozzle first and the reaching distance of the chemical solution flowing out of the nozzle last are changed. Since it is very different (the chemical liquid flow that first jumps out of the nozzle reaches the farthest and gradually decreases in distance), it has a drawback that it is difficult to apply a desired amount to the target location in the paddy field.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art.
It is an object of the present invention to provide a simple and labor-saving method capable of easily spraying a desired amount of a liquid pesticide on a target site of a paddy field.

[0004]

SUMMARY OF THE INVENTION The present invention is a method of spraying a liquid pesticide for paddy rice directly from a nozzle of a pressure accumulating spray container to a flooded sewage paddy field. A pressure-accumulation type spray container is a spray container that can pressurize and accumulate the inside of a container after filling with a liquid pesticide, and sprays the liquid pesticide in the container from the nozzle by opening a passage to the nozzle when spraying. Meaning of the form. The term “direct spraying” means that a chemical liquid flow is sprayed from a nozzle to a target location in a paddy field.

In the pressure accumulating type spray container, the chemical liquid flow is continuously sprayed from the nozzle simply by pushing the lever (pressing the lever to open the passage to the nozzle). Compared to the case, there is no drawback that the hand or the arm is fatigued, and it is more labor-saving. When spraying liquid pesticides directly using a pressure accumulating spray container,
Since the chemical liquid stream jetted from the nozzle reaches a farther place than the water tippo type sprayer, it can be sprayed over a paddy field having a larger area. In addition, in the case of the pressure accumulating type spray container, there is no problem that the reaching distance of the chemical liquid flow that first jumps out of the nozzle is different from the reaching distance of the chemical liquid flow that finally jumps out as in the case of the water tippow type sprayer. In a short time, the desired amount of the liquid pesticide can be easily applied to a desired location in the paddy field, and therefore, the liquid pesticide can be more uniformly and efficiently applied to the paddy field in a shorter working time.

[0006] The pressure accumulating spray container is desirably lightweight, and is therefore preferably made of plastic.
Its main part must be made of a resin having high strength, durability and chemical resistance. Container volume is 100-2000
About 0ml is desirable, and 500-5000m
About 1 is preferable.

In the pressure accumulating type spray container of the present invention, it is particularly important to use a nozzle capable of directly spraying a liquid agricultural chemical for paddy rice. Liquid agricultural chemicals for paddy rice flow to a point other than the target due to the influence, which is not preferable. The structure of the nozzle is not particularly limited as long as it is a structure that can be sprayed directly, and a nozzle having a straight hole is most preferable. The diameter of the tip of the nozzle is determined by the amount of
Although it affects the speed, the reach of the chemical solution flow, and the like, it is generally 0.5 to 3 mm, preferably about 1 to 2 mm. Therefore, the nozzle of the pressure accumulating type spray container has a structure that can be replaced with a nozzle having various tip diameters, or a nozzle having a structure in which the tip diameter of the nozzle can be arbitrarily changed within such a diameter range. Is preferable.

[0008] The accumulator type spray container is generally of a construction in which a pump is attached to the mouth of the container. In the case of such a pressure accumulating type spray container, the pump is removed, and after a certain amount of the chemical solution is filled in the container, the pump is attached and the pump is operated to pressurize the inside of the container. The pressure to be applied depends on the strength of the container and the like, but it is preferable to use a container that can be pressurized to about 5 kg / mm ² . Further, it is preferable to provide a safety valve in the pressure accumulating type spray container in order to prevent the pressure from being increased more than a dangerous pressure. After pressurizing the container,
When the lever is pushed to open the passage to the nozzle, the chemical liquid is vigorously ejected straight from the nozzle. The chemical liquid flow from the nozzle is initially a high-speed linear flow, and slightly widens over a certain distance, but reaches the target location as a substantially uniform chemical liquid flow. Therefore, it is possible to easily spray the required amount of the chemical solution to the target location. In the pressure accumulating type spray container used in the present invention, the reaching distance of the chemical solution flow can be easily set to 10 m or more and about 15 m by selecting the pressure in the container, the tip diameter of the nozzle, and the like. Therefore, a desired amount of the chemical can be sprayed at any spraying point within the range of 0.5 to 15 m (distance from the nozzle).

Examples of the liquid agricultural chemical for paddy rice include herbicides, insecticides, fungicides, etc., with herbicides being particularly preferred. Further, the sulfonylurea herbicide is rich in diffusibility and is one of the most suitable pesticides. As the sulfonylurea herbicide used for paddy rice, pyrazosulfuronethyl [ethyl = 5- (4,6-dimethoxypyrimidine-2) is used. -Ylcarbamoylsulfamoyl) -1-methylpyrazole-4-carboxylate], bensulfuronmethyl [methyl = α- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -o-toluate], imazosulfuron [1- (2-chloroimidazo [1,2-
a] pyridin-3-ylsulfonyl) -3- (4,6-
Dimethoxypyrimidin-2-yl) urea], halosulfuron-methyl, azimsulfuron, ethoxysulfuron,
Synosulfuron, cyclosulfamuron and the like are known. These sulfonylurea herbicides are pesticides.
It may contain one or more species or may contain other herbicides. It is preferable that these pesticides are dispensed so as to spread throughout rice paddies. As the form of the liquid pesticide for rice in the container, for example, emulsion form,
A liquid form, a wettable powder or a wettable granule suspended in water or a flowable form is preferred. Among these, the form in which the water dispersible granule is suspended in water is most suitable for the spraying method of the present invention because of its light weight and compactness, labor saving, safety for agricultural workers, low viscosity properties and the like. Liquid pesticide form. These liquid pesticides are prepared so as to have a spray amount of about 100 to 1000 ml per 10 ares.

The procedure for spraying the liquid pesticide is not particularly limited. For example, after a predetermined amount of water is poured into a container, a predetermined amount of a wettable powder or a wettable powder is added and suspended.
Alternatively, a container is filled with a predetermined amount of an emulsion, liquid agent, or flowable agent, and then a pump is operated to push air into the container to accumulate pressure. While walking on the ridge of the paddy field with this pressure accumulating type spray container, or from appropriate positions on the ridge, push the lever of the container and direct the liquid pesticide for paddy rice from the nozzle of the container to the flooded paddy field. Spray. When the pressure in the container decreases during spraying, the pump is operated again to pressurize the inside of the container. As a form of spraying on the paddy surface,
Depending on the area and shape of the paddy field, an appropriate form such as a picture frame, a stripe, a grid, a spot, or a combination thereof can be adopted. Further, in the case of the pressure accumulating type spray container, since the reaching distance of the direct stream is long, the spraying operation can be completed only from one location of the ridge in the paddy field having a small area.

[0011]

1 and 2 show an example of a pressure accumulating type spray container used in the method of the present invention. In FIG. 1, reference numeral 1 denotes a container body of a pressure accumulating type spray container;
Is a pump, 3 is a handle of a piston shaft (also functions as a handle having a container), 4 is a safety valve, 5 is a gauge rod of a safety valve, 6 is a lever valve, 7 is a lever, 8
Denotes a nozzle pipe, 9 denotes a nozzle, 10 denotes a maximum memory position of a liquid amount, 11 denotes a funnel type inlet of a container, and 12 denotes a hose. The main part of the accumulator type spray container is made of chemical resistant high strength engineering plastics. The pressure accumulating type spray container is of a type in which the container is sprayed by holding the container by hand, but a string to be hung on a shoulder may be provided as necessary. The capacity of the container is about 1 to 5 liters.
The side wall of the container body 1 is made of a transparent or translucent resin so that the amount of liquid in the container can be seen. The pump 2 is hermetically connected to the mouth of the container body 1 by screwing or fitting, and pressurizes the inside of the container by grasping the handle 3 and operating the piston shaft of the pump 2 up and down. Have been. As shown in FIG. 2, the pump 2 is removed from the container, and the medical solution is filled in the container. Numeral 10 indicates the maximum memory position of the amount of the medicinal solution that can be filled. For example, in the case of a 2 liter spray container, it indicates the position of the liquid level when the container is filled with the 2 liter medicinal solution. When the chemical liquid is filled above the maximum memory position, the volume of the air chamber in the container above the liquid level is reduced, and the spraying time is shortened. After filling the liquid medicine, the pump 2 is attached and the inside of the container is pressurized by operating the pump. The pressure in the container is above a certain pressure, for example, about 5 kg /
The safety valve 4 is provided so as not to exceed ² cm ² . As shown in FIG. 2, when the inside of the container is pressurized by the pump, the gauge bar 5 of the safety valve 4 gradually comes out, and the pressure becomes about 5
The valve is opened so that the pressure does not increase further at kg / cm ² . After pressurizing the inside of the container, the lever-type valve 6 is grasped by hand, and when the lever 7 is pulled in the direction B, the valve opening is opened, and the chemical in the container is ejected from the nozzle 9 through the nozzle pipe 8. The tip diameter of the nozzle is about 1 to 1.3
mm. While the lever 7 is being pulled in the direction B, the chemical liquid is ejected from the nozzle 9, and the injection is stopped when the liquid is returned to the position C.
Therefore, by pulling the lever 7 with the nozzle 9 directed to a target location in the paddy field, a desired amount of the chemical solution can be sprayed directly onto the target location. When the lever is raised to the position A, a continuous injection state is obtained even when the finger is released from the lever. In this type of pressure accumulating type spray container, a desired amount of a chemical solution can be sprayed directly onto any point within a range of 0.5 to 15 m from the nozzle.

The pressure accumulating type spraying container shown in FIG. 3 is of a type in which a spraying operation can be performed by grasping a handle with a hand and pushing down a lever with a thumb, as compared with the type shown in FIG. It is a more handy type. In FIG. 3, 21 is a container body, 22 is a handle,
23 is a lever, 24 is a pump, 25 is a nozzle, 26 is a safety valve, 27 is the highest memory position of the liquid amount, 28 is a dip tube, and 29 is a reinforcing column of the container. The main part of the pressure accumulating type spray container is made of high-strength chemical-resistant engineering plastics like the pressure accumulating type spray container shown in FIG. The capacity of the container is about 0.5 to 1.5 liters. The pump 24 is hermetically connected to the mouth of the container body 21 by screwing, and is configured to pressurize the inside of the container by operating the pump up and down. The pump 24 is removed from the container, and the chemical is filled in the container. After filling the drug solution, the pump 24 is attached to the container, and when the inside of the container is pressurized by the pump, the gauge bar of the safety valve 25 comes out gradually, and when the pressure is about 5 kg / cm ² , the valve is opened and the pressure is reduced. It is configured so as not to be higher. After pressurizing the container, grasp the handle 22 with your hand,
When the lever 23 is depressed with the thumb, a passage to the nozzle 25 is opened, and the chemical solution passes through the dip tube 28 and passes through the nozzle 25.
Inject from As shown in FIG. 4A, the nozzle 25 is a short nozzle having a length of about 5 cm, has a straight hole, and has a tip diameter of 1 to 2 mm. The nozzle 25 is replaceable and can be replaced with nozzles having various tip diameters. Further, the nozzle 25 can be replaced with a long nozzle shown in FIG. 4B or a two-stage long nozzle whose length can be extended as shown in FIG. Even in this type of accumulating type spray container, the reach of the chemical solution flow reaches 10 m or more. Therefore, it is possible to directly spray a desired amount of the chemical solution at an arbitrary point within a range of 0.5 to 10 m from the nozzle.

[0013]

Example 1 Rice was transplanted to four paddy fields in a 30a (30 × 100 m) section by a standard method, and the water depth was kept at 4 cm. Seven days after transplantation, the following drugs were sprayed. Commercially available imazosulfuron, pyributicarb, Daimlon flowable (trade name: award flowable, hereinafter referred to as award; pyributicarb: O-3)
-Tert-butylphenyl = 6-methoxy-2-pyridyl (methyl) thiocarbamate; Daimulon: 1- (α,
α-dimethylbenzyl) -3- (paratolyl) urea],
Bensulfuron-methyl-pyributicarb-Dimron Flowable [trade name: Calshot Flowable, hereinafter referred to as Calshot], Bensulfuron-methyl-tenilchlor, Daimlon Flowable [trade name: Xametz Flowable, hereinafter referred to as Xametz; Tenylchlor: 2-chloro-N- (3 -Methoxy-2-thenyl) -2, ', 6'
-Dimethylacetanilide] was prepared in an amount of 1500 ml. In addition, 180 g of pyrazosulfuron-ethyl cafenstrole water dispersible powder (test name: NC-355 water dispersible powder, hereinafter referred to as NC-355) is dissolved in water and 1500 g
A solution in ml was prepared. Filling the liquid pesticide into the container (2000 ml capacity) of the accumulator type sprayer shown in FIG.
The pump was operated and pressurized and accumulated until the pressure in the container became about 5 kg / cm ² . With this accumulator type sprayer, once every 3 to 4 steps (1.5 to 2 m intervals) from the ridge,
Shake the nozzle slightly in the horizontal direction to spray the medicine about 6 m from the ridge. This operation was repeated to make a round around the ridge, and a total of 1500 ml of the medicine was sprayed in a frame shape at a point about 6 m from the ridge of the paddy field of 30 × 100 m. As a control for each drug, a prescribed amount of the same drug (50 ml /
a) was evenly spread over 4 m ² (2 × 2 m). Effect: The effects of chemical injury were evaluated 2 weeks after spraying and 4 weeks after spraying. The criterion was determined in 6 stages from 0: no effect to 5: complete death, and the average of the survey points at 5 locations in each section was calculated. (Outline of tillage) Chemical treatment 7 days after rice transplanting Cultivar Koshihikari (2.5 leaf stage) Weed occurrence at the time of treatment Nobie: 0.5 leaf stage, Onion: Onset, Firefly: Onset, Spodoptera: Not occurring, Omodaka: Not yet Occurrence, Azena: Not generated Table 1 shows the results.

[0014]

Example 2 Rice was transplanted to one paddy in a 10a (25 × 40 m) section by a standard method, and the water depth was kept at 4 cm. Seven days after transplantation, the following drugs were sprayed. Commercially available etofenprox surf agent [trade name: trebon surf; hereinafter referred to as trebon; etofenprox: 2- (4-ethoxyphenyl) -2]
-Methylpropyl = 3-phenoxybenzyl = ether] was prepared in an amount of 500 ml. Fig. 3
The container (1000 ml capacity) of the pressure accumulating type sprayer shown in (1) was filled, and the pump was operated to reduce the pressure in the container to about 5 kg / cm ^2.
It was pressurized and accumulated until it became. Hold this accumulator type sprayer in hand, and shake the accumulator type sprayer slightly laterally once every 3 to 4 steps (1.5 to 2 m intervals) from the ridge, and move about 6 m from the ridge. Spray the drug at the point. This operation was repeated to make a round around the ridge, and a total of 500 ml of the medicine was sprayed in a frame shape at a point about 6 m from the ridge of the paddy field of 25 × 40 m. As a control for each drug, a prescribed amount of the same drug (50
ml / a) was uniformly sprayed over 4 m ² (2 × 2 m). The judgment of the chemical damage was made one week after spraying. Judgment criteria: Effect: number of adults, number of larvae, leaf damage rate Injury: 0: no effect to 5: investigation of 40 strains in each of 6 stages of complete withering (summary of cultivation) Chemical treatment 7 days after rice planting Variety Akinohikari (2.2 leaves) Period) Target pest Rice water weevil Spray date May 22 The results are shown in Table 2.

[0016]

Example 3 Rice was transplanted to one paddy in a 10a (25 × 40 m) section by a standard method, and the water depth was kept at 4 cm. The following drugs were sprayed 35 days after transplantation. A product obtained by diluting 500 g of commercially available flutranil wettable powder (trade name: Monkat wettable powder, hereinafter referred to as moncut; flutranil: α, α, α-trifluoro-3′-isopropoxy-o-toluanilide) in 10,000 ml of water. Prepared. This liquid pesticide (2000
ml) of the accumulator type sprayer shown in FIG.
Volume) and operate the pump to reduce the pressure in the container to about 5
It was pressurized and accumulated until it reached kg / cm ² . Holding this accumulator type sprayer, once every 3 to 4 steps (1.5
(At intervals of 2 m), the nozzle is slightly swung laterally to spray the medicine at a point about 6 m from the ridge. This operation was repeated to make a round around the ridge, and a total of 10,000 ml of the drug was sprayed in a frame shape at a point about 6 m from the ridge of the paddy field of 25 × 40 m. As a control for each drug, a prescribed amount of the same drug (2000 L, 10 L / a) was evenly applied to 4 m ² (2 × 2 m). Effect: The chemical damage was evaluated 4 weeks after spraying. The criteria were as follows: Effect: Calculate the control value of the control treatment. Injury: 0: No effect to 5: Complete mortality. (Outline of tillage) Chemical treatment 35 days after rice transplanting Cultivar Koshihikari (2.5 leaf stage) Infestation disease Rice blight disease The results are shown in Table 3.

[0018]

Example 4 Rice was transplanted to two paddy fields in a 30a (30 × 100 m) section by a standard method, and the water depth was kept at 4 cm. Seven days after transplantation, the following drugs were sprayed. 180 g of bensulfuron-methyl / cafentrol granule wettable powder produced in the following formulation example 1
In addition, 180 g of imazosulfuron / cafentrol water-dispersible granule produced in Preparation Example 2 below was sprayed on a paddy field in the same manner as in NC-355 in Example 1. In the same manner as in Example 1, the above two agents were uniformly applied as a control. The effects and phytotoxicity were determined by the same method and criteria as in Example 1, and the results are shown in Table 4.

[0020]

(Preparation Example) [Preparation Example 1] Bensulfuron-methyl / cafentrol granule wettable powder Bensulfuron-methyl 8.7 parts, cafenstrole 5
0 parts, 7 parts of sodium ligninsulfonate, 10 parts of naphthalenesulfonic acid formalin condensate, 2 parts of polyoxyethylene alkyl phenyl ether sulfate, 20 parts of ammonium sulfate, and 2.3 parts of kaolin clay, and mixed with a single track mill (( (Seishin Corporation). Next, a predetermined amount of granulation water is added, and a universal mixer (Co., Ltd.)
(Dalton) and granulated with a basket-luser (BR-200, manufactured by Fuji Paudal Company) equipped with a 0.5 mm screen, and dried at 50 ° C. for 2 hours to obtain the wettable powder of the title. .

Formulation Example 2 Imazosulfuron / Cafentrol Granule Water Dispersant In Formulation Example 1, 8.7 parts of bensulfuron-methyl is used in 10.5 parts of imazosulfuron, 20 parts of ammonium sulfate in 20.5 parts, and 2.3 parts of kaolin clay. Imazosulfuron cafenstrole wettable powder was obtained in exactly the same manner as above except that was replaced by 0 parts.

[0023]

It is difficult to spray a desired amount of a liquid pesticide to a target portion of a paddy field by the conventional method using a water tappo sprayer. However, according to the present invention, a desired amount of the liquid pesticide is supplied from a ridge to a paddy field. And the pesticide can be easily and efficiently sprayed on the paddy field in a shorter working time. In addition, when a liquid pesticide is directly sprayed using a pressure accumulating type spray container, the chemical liquid jet sprayed from the nozzle reaches a farther distance than a water tepow type sprayer, so that it can be spread over a larger paddy field. Spraying is possible. Also,
The method of the present invention using a pressure accumulating type spray container can be achieved by simply pressing a lever, and a chemical liquid stream is continuously sprayed from a nozzle, so that it is compared with a water tappo sprayer which sprays by repeating a triggering operation. It is more labor-saving.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an example of a pressure accumulating type sprayer used in the present invention.

FIG. 2 is a diagram showing a state in which the pressure accumulating sprayer of FIG.
It is explanatory drawing of the method of pressurizing the inside of a container.

FIG. 1 is an explanatory view of another example of a pressure accumulating type sprayer used in the present invention.

FIG. 4 is an explanatory diagram of various replacement nozzles.

[Explanation of symbols]

 1,21 Accumulator type spray container, 2,24 Pump 3,22 Handle 4,26 Safety valve 5 Gauge rod of safety valve 6 Lever type valve 7,23 Lever 8 Nozzle pipe 9,25 Nozzle 10,27 Maximum liquid volume Memory location 11 Funnel type inlet 12 Hose 28 Dip tube

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeru Ishii 3-7-1 Kandanishikicho, Chiyoda-ku, Tokyo Nissan Chemical Industry Co., Ltd. (72) Inventor Takuwa Kamagai 722-1, Tsuboicho, Funabashi-shi, Chiba Industrial Co., Ltd.

Claims (9)

[Claims] 1. A method for spraying a liquid pesticide for paddy rice directly onto a flooded sewage paddy from a nozzle of a pressure accumulating spray container. 2. The pressure-accumulation type spray container has a volume of 100 to 200.
2. The method according to claim 1, wherein the volume is 00 ml. 3. The method according to claim 1, wherein the form of the liquid pesticide for rice is a form in which a wettable powder or a wettable powder is suspended in water, a flowable form or an emulsion form. 4. The liquid pesticide for paddy rice is a herbicide.
The described method. 5. The method according to claim 1, wherein the distance from the nozzle of the pressure accumulating type spray container to the spraying point of the liquid agricultural chemical for paddy rice is 0.5 to 15 m. 6. The method according to claim 1, wherein the liquid pesticide for paddy rice is a form in which a water dispersible granule is suspended in water. 7. The method according to claim 1, wherein the liquid agricultural chemical for paddy rice is an agricultural chemical containing a sulfonylurea herbicide. 8. The method according to claim 1, wherein the liquid agricultural chemical for paddy rice is an agricultural chemical containing pyrazosulfuron-ethyl. 9. The method according to claim 1, wherein the liquid pesticide for rice is a pesticide containing bensulfuron-methyl, imazosulfuron, halosulfuron-methyl, azimusulfuron, sinosulfuron or cyclosulfamuron.