JPS5843905A - Fungicide and insecticide composition for rice crop - Google Patents

Abstract

PURPOSE:The titled composition that contains as active ingredients, 3-allyloxy- 1,2-benzisothiazole-1,1-dioxide, a systemic organophosphate and a carbamate insecticide, thus showing synergic effect against a variety of pests to rice plant economically and safely. CONSTITUTION:The objective composition comprises 3-allyoxy-1,2-benzisothiazole-1,1-dioxide, a systemic organophosphate such as O, O-dimethyl O-[3-methyl- 4-(methylthio)phenyl]thiophosphate and a carbamate insecticide such as 2- isopropoxyphenyl-N-methyl carbamate, 2-isopropylphenyl-N-methyl carbamate. It shows strong synergism which is developed quickly and retained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the use of 3-allyloxy-hecopenziisothiazole-/,/-sooxide and a permeable organophosphorus system and/or
The present invention also relates to a rice sterilizing and insecticidal composition containing one or more carbamate insecticides as an active ingredient.

More specifically, 3-tyryloxy-/, 2-penfi:
/f7:/-#-/, /-N';
o,o-dimethyl-o-[3-methyl-cou(methylthio)phenylcothiophosphate (hereinafter referred to as "fenthion"), ), ma, o, o-
Dimethyl-2,2,2-trichlor-/-hydroxyethylphosphonate (hereinafter referred to as "trichlorfon")
and/or as a systemic carbamate-based insecticide, Koinozolopoxyphenyl-N-methylcarbamate (hereinafter referred to as "Propoxur J") 1.2-1 Noglobylphenyl-N-1fk Carbamate (hereinafter referred to as "Inzolocaso") 2-Secondary Butylphenyl N-Methyl Carbamate (hereinafter referred to as rBPMCJ) or 2-Secondary Butylphenyl-N-Methyl Carbamate (hereinafter referred to as rBPMCJ). It exerts a remarkable synergistic control effect against diseases such as sheath blight and leaf blight, and at the same time has a control effect against major pests of rice, especially planthoppers, leafhoppers, leafhoppers, and rice leafhoppers. The present invention provides a novel sterilizing and insecticidal composition.

In recent years, as rice cultivation methods have become more labor-saving and mechanical transplantation of young seedlings has become widespread throughout the country, major changes have appeared in the appearance of diseases and insect damage to rice.

In particular, the high temperature period during the ripening stage of rice is longer than ever, and diseases such as blast, sheath blight, and leaf blight are occurring more frequently.Increasing damage caused by pests such as planthoppers, leafhoppers, leafhoppers, and leafminers. also shows a growing trend. However, it is extremely difficult to simultaneously and completely control these various diseases and insect pests of rice.Therefore, new sterilizers, insecticides, and their control technologies are needed that can comprehensively control rice pests and diseases in a labor-saving and economical manner. development is desired.

"Probenazole", one of the active ingredients of the present invention, is
Special public Shogu No. 3-3-3rO and special public Shoter 37
This is a systemic blast control agent disclosed in the specification of No. 2117, and is a known drug that has extremely low toxicity to humans, livestock, and fish and shellfish, and causes almost no phytotoxicity to adult rice seedlings. The water surface application technology for this ``propenazole'' in granule form has been established, and it is currently in widespread practical use as a control agent for rice blast. In addition, for the initial control of pests and diseases in rice seedlings that have been mechanically transplanted, which has recently become widespread, sufficient effects can be achieved with a chemical application rate of approximately 2 to 10 minutes of the amount applied after transplanting. There is a strong demand for so-called lees processing technology, in which chemicals are applied directly to rice seedling boxes, from the viewpoint of labor-saving and economic efficiency.

In view of these circumstances, the present inventors have conducted intensive studies by testing various drugs with different action characteristics.

As a result, "zolopenazole" and "disulfoton", "
Mixtures in combination with fenthion, trichlorfon, zolodexur, iso!locarp, or rBPMCJ are effective as rice fungicides, especially against rice blast, sheath blight, and leaf blight. It has been found that these drugs reliably and synergistically or synergistically exhibit the effect of enhancing efficacy.

In addition, the rice seedling glaze treatment can control rice blast and early rice leaf blight without causing the above-mentioned chemical damage to rice, and at the same time, by increasing the residual effect, planthoppers, leafhoppers, etc.
It can also control pests such as leafminers and leaf beetles.

The bactericidal and insecticidal compositions of the present invention exhibit remarkable synergistic and synergistic effects that are completely unexpected from the effects of using each active ingredient alone, with immediate and residual effects.

The present invention was made based on such new findings,
The bactericidal and insecticidal composition of the present invention can simultaneously control the major diseases and pests of rice as described above with a synergistic effect, so the amount of the active ingredient used may be smaller than the usual amount of a single ingredient.
Therefore, there is less concern about toxicity to humans and livestock, chemical damage to useful crops, and environmental pollution, so it can be used with confidence, and is labor-saving and economical. Since the rice sterilizing and insecticidal composition of the present invention has such characteristics, it has extremely high practicality.

The bactericidal and insecticidal composition of the present invention is prepared by adding the active ingredient and various carriers and various auxiliary agents that are normally used in the formulation of agricultural chemicals to form a powder (DL-type powder) by a method generally used in the agricultural chemical manufacturing field. ), wettable powders, liquids, preparations, flowables, fine granules, granules, tablets, and other desired forms.

The carriers used in the present invention include solid carriers such as clay, talc, kaolin, diatomaceous earth, and silica; alkaline carriers such as benzene, xylene, toluene, kerosene, and alcohols (e.g., methanol, ethanol, isozolonol, n- Liquid carriers such as (butanol), ketones (eg, acetone, methyl ethyl ketone, cyclohexanone) are used. These can be formulated with appropriate amounts of surfactants and other auxiliary agents, such as stabilizers and spreading agents, for use.

"Glopenazole" used as the active ingredient of the present invention
The blending ratio of the permeable organic phosphorus and/or carbamate insecticide is 0.0 parts by weight of the former and 0.0 parts by weight of the latter. /~
It is appropriate to use 70 parts by weight. In addition, in the composition of the present invention, the amount of active ingredients to be mixed is 0.00% by weight.
It can be blended in the range of / to 5%, preferably 0
0j-70%.

In practical use, the mixed active compound content in the various formulations and spray preparations mentioned above is generally between 0.0/-
A range of 30 weights, preferably 09/-/j weights is appropriate.

The composition of the present invention can also be applied as a means for absorbing multiple components from the lower part of the rice body to exhibit bactericidal and insecticidal effects.

One of the embodiments is a mode in which the composition of the present invention is applied under irrigation conditions, so-called water surface application, which includes soil surface treatment, soil mixing treatment, underwater treatment, water surface treatment, and the like. In this case, the composition of the invention is conveniently in the form of granules, such as microgranules, granules, granules, tablets, and the like. The term "granular material" as used herein is not limited by its size, shape, manufacturing method, etc., and includes, for example, rod-shaped, spherical, cylindrical, elliptical, irregularly shaped, plate-shaped, and other forms called tablets. Contains smallpox.

In another embodiment, the composition of the present invention is applied to rice seedling cultivation soil for young seedlings during the seedling-raising period. The cultivation soil referred to here may be any medium that allows rice seedlings to grow, and any commonly available materials may be used. Then, the composition of the present invention is applied to the soil by an effective method for distributing it as uniformly as possible in the soil.

In this embodiment, there are two methods: a method in which the composition of the present invention is incorporated into the soil in advance, and a method in which the composition is treated before transplanting. In the latter case, as in the case of water surface application, it is convenient for the composition of the invention to be in the form of granules.

The amount of the composition of the present invention to be used varies depending on various factors such as the degree of damage, location, tendency of occurrence, weather, environmental conditions, dosage form, component content in the preparation, embodiment, etc. In general, for water surface application, 3 per 10 ares as a granular preparation.
Apply at a rate of ~Ji. Furthermore, when treating the rice seedling cultivation soil, the seedling cultivation soil surface/lr00 is added as a granular preparation.
cm2 (This is a commonly used seedling box, length x width x
It is applied at a rate of 30 to 1 sot per height = A Occm x 30 cm x 3 cm).

Next, some examples of the present invention will be shown, but the present invention is not limited only to the following examples.

Examples/(Granules) "Propenazole" 3 parts by weight "Zo. Poxul" 3 parts by weight Sodium ligmon sulfonate ≠ parts by weight Lauryl sulfate 2 parts by weight Kerr is Kiji methylcellulose 1 part by weight and clay 7 parts by weight After mixing and pulverizing the mixture, an appropriate amount of water is added to granulate it, dried in a fluidized fluid dryer, and sieved to obtain granules.

This granule is applied to box-raised seedlings for mechanical transplantation of young and medium-sized seedlings, and is sprayed evenly per box to JOJ on the day of transplantation to Honda to prevent rice blast disease and Honda's early pests, the rice rot grub, rice seedlings, etc. This granule was used to control leaf blast, leaf blight, planthoppers, planthoppers, and planthoppers in rice plants that had been transplanted to rice fields by 100% with a synergistic effect.
3 per 10 ares using a suitable granulator for ~70 days
By applying it to the water surface at a rate of 100 kg, the pests were controlled with a synergistic effect.

Example 2 (granules) "Propenazole" / 5 parts by weight "Daisulfoton" j parts by weight Clay granules
73.3 parts by weight The above clay granules were placed in a rotary mixer, and while rotating, the above amounts of "Probenazole" and "Daisulphoton" dissolved in an organic detergent were sprayed on, and after uniformly wrinkling, the mixture was heated at tto-so℃. Dry to form granules - This granule is applied to seedlings grown in boxes for mechanical transplantation of young and medium-sized seedlings, and is sprayed evenly on the day of transplantation to Honda to prevent rice blast and planthoppers.・1o leafhoppers with synergistic effect
os was controlled.

Example 3 (granules) "Glopenazole" in parts by weight "Fention" V parts by weight r BPMCJ
3 parts by weight polyvinyl alcohol 2 parts by weight and 7 parts by weight mixture of Merck and clay. Form into granules of z~1lIII and dry.

This granule is used to control leaf blast, leaf blight, planthoppers, and leafhoppers in rice after transplanting to Honda.
The pests were 100% controlled with a synergistic effect by applying the mixture to the water surface at a rate of 10 are/#3) using a suitable granulator a few days in advance.

The mixed active compounds according to the invention are characterized by a substantially improved efficacy as well as by very low toxicity for warm-blooded animals, so that the compositions are of great utility.

The unexpectedly superior and remarkable effects of the mixed active compounds of the present invention can be seen from the following test results when used against rice blast disease.

Test example / Preparation of test compound for seedling box application against rice blast disease: Predetermined amount of active compound and two parts of polyvinyl alcohol,
and carrier such that the total amount is 100 parts by weight: the remaining amount of clay is thoroughly mixed and pulverized, an appropriate amount of water is added and kneaded, and the particle size is 0.000. A~/11 granules are prepared, dried, and used for the test.

Test method: Paddy rice (variety: Asahi), length x width x height 60cm x
The seedlings were cultivated in a 30 cm x 3 ctx plastic seedling box for 20 days, and the predetermined granules prepared as described above were uniformly scattered over the entire fence to the indicated dosage.

The day after chemical application, take the young seedlings with the soil still attached and measure the diameter/
, 2C1l white porcelain/,) were transplanted three each. After transplantation,
Normal submerged cultivation was continued in a glass room, and after 20 days, rice blast fungus spores were spray inoculated. Seven days after inoculation, the degree of morbidity of the potted insects was graded and evaluated according to the following criteria, and the control value (equity) was determined. At the same time, the degree of drug damage was evaluated using the following criteria.

Morbidity Level Lesion area ratio■ 0 0 0, to 2 or less 7　　　　　　3〜yo 2　　　　　　6～10 3　　　　　　　　／／−20 t　　　　　　　　　〜tO ｊ　　　　　　Da1 or more This test is the result of 3 pots in 7 districts.

Degree of drug damage 1: No expression Professional: Occurs, but there is no practical problem (recoverable leaves, browning tips) +: Expression, practical problem weak (leaf tip withering) +: medium 〃 +1+: Strong Book: 　　〃〃　　　　　　　　　 The results are shown in Table 1.

The present invention, which has been explained in detail in the detailed description of the invention, can be specifically summarized as follows.

(1) 3-allyloxy-2-benzoia:
/'-h-7,/-dioxide and systemic organophosphorus insecticides, o,o-diethyl-8-λ-(ethylthio)ethylphosphorodithioate, 0.0-dimethyl-〇-[3-methyl -p-(methylthio]phenyl]thiophosphate or 0.0-dimethyl-2,2,2-trichloro-/-hydroxyethylphosphonate, and/or the systemic carbamate insecticide, 2-isopropoxyphenyl-N -Methyl car 5.gmate 1. Characterized by containing one or more types of 2-4 sozolopylphenyl-N-methyl carbamate, or Kosecon/li-7'' tylphenyl-N-methyl carbamate as an active ingredient. Sterilizing and insecticidal composition for rice cultivation.

(2) The composition of the mixed active compound is 1 part by weight of "propenazole" and 1 part by weight of permeable organophosphorus and/or
Alternatively, the rice sterilizing and insecticidal composition according to item (1) above, which contains 0.1 to IO parts by weight of a carbamate insecticide.

(3) A method for controlling rice pests and diseases, which comprises applying an amount of the mixed active compound as an active ingredient for controlling rice pests and diseases to pathogenic bacteria, pests, and/or their growth sites.

(4) A mixed active compound may be used alone or a mixed active compound may be combined with a diluent (solvent and/or filler and /lfc is a carrier) and/or surfactant, and if necessary, stabilizer, e.g. By mixing with a fixing agent and a synergist, the mixed active compound is 0.0/~30% by weight,
Preferably 0.1-/! The pest control method according to item (3) above, using a prepared chemical containing a weight ratio.

(5) The pest control method according to item (3) above, wherein the applied amount of the mixed active compound is about 0.3 to 10 kg, preferably 3 to 1 kg per 1O.

(6) The amount of the mixed active compound applied to the seedling box (length x width x height: 6oclIL x 3ocIL x 3cI)
IL) per about j-,20Of, preferably Fl! ;0-
/ 30? The pest control method according to item (3) above.

Agent's name: Kawahara 1) - Ho

Claims (1)

[Scope of Claims] It is characterized by being impregnated with 7,3-allyloxy-7,2-benziisothiade and a type of permeable organophosphorus-based and/or carbamate-based insecticide or as an adhesive component, −□□〇 Bacteria, killing 1
Kumimono. -re, penetration +am@') 77F
, □1, a, 0.0-diethyl-8-2-Cethylthio)ethyl0,. -lfk2. 2 [3-)fk-months-
(.tilthio)phenylcothiophosphate or -2,2,2-)lichloro-7'-hydroniadiethylphosphonate. The sterilizing and insecticidal composition for rice cultivation according to claim 1. 3. A patent claim that the penetrating i-carbamate insecticide is 2-isopropoxyphenyl-N-methylcarbamate, 2-'7r sozolopylphenyl-N-methylcarbamate, or 2-secondarybutylphenyl-N-methylcarbamate A sterilizing and insecticidal composition for rice cultivation as described in item 1.