JPS59210007A - Agricultural and horticultural fungicidal composition - Google Patents

Abstract

PURPOSE:The titled composition exhibiting extremely improved controlling activity against various kinds of blights such as powdery mildew of cucumber, etc. without providing crops with phytotoxicity, obtained by blending a highly purified machine oil having specific low sulfonating value with kasugamycin. CONSTITUTION:100pts.wt. highly purified machine oil having <=10 sulfonating value is blended with 2-50pts.wt. kasugamycin to give an agricultural and horticultural fungicidal composition exhibiting extremely improved synergistic controlling effects on various kinds of blights such as powdery mildew of cucumber, downy mildew of cucumber, leaf mold of tomato, etc., which are slightly expected from effects of each agent of its own. The machine oil has lower sulfonating value than conventional machine oil, and the amount of it used is small, so it has lower phytotoxicity to crops and usable without anxiety.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fungicidal composition for agricultural and horticultural use, which is characterized by blending highly purified machine oil with a sulfonation value of 10 or less and kasugamycin (hereinafter abbreviated as KSM).

Conventionally, machine oil has been widely used as a control agent for mandarin oranges, apples, caterpillars, and scale insects.

It is also used as a horticultural disease control agent, but it is used to control late rot disease in grapes (2,000 years ago). Its disease control activity is considerably inferior to that of conventional known horticultural fungicides.
Therefore, it is necessary to spray at a high concentration of 4,000 to 9,700 ppm per day.

For this reason, it has the disadvantage that phytotoxicity is likely to occur if sprayed during the growing season of crops.

In recent years, pesticide pollution has been debated, and there is a strong demand for safe use of pesticides, so by taking advantage of the characteristics of conventional machine oil,
There was a strong desire to develop new drugs that could overcome these drawbacks.

In view of these circumstances, as a result of intensive study on a mixture of machine oil and a known fungicide for horticulture, we found that highly refined machine oil, which is mainly used as an insecticide and acaricide, has a rice-potato fungicide effect. K used as a disease control agent
The present invention was completed based on the finding that mixing SM exhibits extremely excellent control activity against various diseases such as cucumber powdery mildew, cucumber rot, and tomato leaf mold.

The effect of the agricultural and horticultural fungicidal composition according to the present invention is not simply an additive effect of the pesticidal effects of each single agent, but is an extremely outstanding effect that is difficult to estimate from the inherent effects of each agent. It was confirmed that there was a clear synergistic effect.

The active ingredient of the agricultural and horticultural fungicidal composition according to the present invention (highly refined machine oil f used as the Yoshiichi ingredient) has a lower sulfonation value than conventional machine oils and requires less use. B against high-quality fruits such as mandarin oranges and apples, scale insects, etc.: 42'T
When used with FIJ-&, there is less worry about drug damage and it can be used with peace of mind. However, its bactericidal activity is mediocre, and it causes phytotoxicity to vegetables such as cucumbers, so it cannot be used alone as a control agent for I. leaf mold, as shown in the test example below. However, by mixing it with KSM, a known fungicide, it was able to exhibit sufficient disease control activity for practical purposes without giving any medicinal effects to crops, making it a useful fungicide for agriculture and horticulture. sell.

When implementing the present invention, it is preferable to set the mixing ratio of machine oil and KSM to an appropriate value depending on the conditions of use and the target to be controlled. KSM2~ for 100 parts of refined machine oil
Practically speaking, it is preferable to mix it in a ratio of 50 parts by weight.

The dosage form of the sterilizing composition for common use in farms of the present invention can be appropriately selected depending on the usage situation, but it is usually preferable to use it as a suspended pA solution. Active agents used in the suspension include, but are not necessarily limited to, solhitan monolaurate, lauryl sulfate, polyoxyethylene solhitan monooleate-1, and white carbon. It's not a thing.

Further, by using the agricultural and horticultural fungicidal composition of the present invention in combination with other fungicides and insecticides, a wide range of pests and diseases can be controlled at the same time.

Next, the effects of the agricultural and horticultural fungicidal composition of the present invention will be specifically explained using test examples.

Test Example 1 (Tomato Leaf Mold Control Effect) Mulch-cultivated seedlings of tomatoes (variety: Hikari) were fertilized in a field (fertilization fif: : per lo area with CDU chemical N:P:, 15 kg of each ingredient, and 600 kg of compost as base fertilizer). Sumitomo urea composite solution llt! No. 2 200 times solution was irrigated once at a rate of 150 mons per 10 ares.) with a needle width of 18
0 cm, 2 rows I- with a spacing of 45 cm, and each test plot has 1
A double system of 8 stocks in each ward was adopted. Chemical powder 11j is a diluted solution of a suspension prepared according to Example Sweat 3 times every 5 to 7 days from the initial onset of tomato leaf mold disease.
It was sprayed with a small shoulder sprayer to 50 to 200 letters.The test spray liquids all contained a spreading agent /\Iten A (trade name for a spreading agent containing 30% polyoxyethylene alkyl ether). (registered trademark of Hokuko Chemical Industry Co., Ltd.) was added in an amount of 0.01%.

Eight days after the final spraying, the disease onset survey was conducted on 35 leaflets (total of 70 leaflets) in 1 section of leaf blades from 5th to 81st from the bottom, using the following evaluation criteria and formula to determine the inferiority of the diseased area (%). After determining the number of lesions, the control value (%) of each sprayed area was calculated by comparing it with the number of lesions in the non-sprayed area.

Inspection criteria for diseased lesions Disease index: 5 Nidomado leaf: 80% or more" Nidomado leaf area ratio: 4 Nidomado leaf: Less than 60-80%: Nidomado leaf: Less than 60-80% Less than 40-60% of leaf spot area ratio 2 Less than 20-40% of leaf blight on tomato leaves [Area ratio of 1, less than 1-20% of leaf spot on tomato leaves U
[Area commission.

0: No disease onset × lOO In addition, in the present invention, whether or not there is synergy by mixing two types of drugs is determined by the following formula.
The expected value (PE) of the mixture was determined using the formula (Iby), and the presence or absence of a synergistic effect was determined from the relationship with the measured value (PC).

Pa: Actual control value by spraying highly purified machine oil Pb: KS
The criteria for determining the actual control value effect using the M dispersion 4j are as follows.

PC>PE: Synergistic effect PC=PE: Additive effect PC<PE: antagonistic effect The results are shown in Table 1.

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

Back 1 Example 1 1', 60 parts of refined machine oil (all parts by weight are shown below), 3 parts of sorbitan monolaurate, and 2 parts of finely ground lauryl sulfate were added, and the mixture was further ground to 5μ or less using a jet mill. After adding 30 parts of KSMi and 5 parts of white carbon and mixing with a stirrer, stir thoroughly using a homogenizer, colloid mill or homomixer.
A viscous suspension of the invention is obtained.

For actual disease control, shake this suspension thoroughly, dilute it 400 to 600 times with water, and use an appropriate spraying device to spray it on the plant at a rate of 80 to 350 g/10 are. Spray with.

Shigon I III M machine oil 55 parts, Nrubitan Monoole I
n-1-3 part, holoxyshetylene nonylphenyl-
1 part of polyoxyethylene sorbin monooleate and 1 part of polyoxyethylene sorbin monooleate were mixed together, and then 35 parts of KSM raw material, which had been pulverized to less than 5 μm using a jet mill, and 5 parts of white carbon were added. The following treatment is carried out in the same manner as in Example 1 to obtain a viscous suspension of the present invention. The method of use is the same as in Example 1.

Subiwa 1 60 parts of highly refined machine oil, 2 parts of polyoxyethyl 1/sorbitan monolaurate, and 3 parts of sorbitan monolaurate were mixed, and then 30 parts of KSM raw material finely ground to 5μ or less with a jet mill and white carbon 5 1 part and proceed as in Example 1 to obtain a viscous suspension of the invention. The method of use is the same as in Example 1.

KSM raw material was mixed with 80 parts of highly refined machine oil, 7 parts of polypropylene glycol, 3 parts of polyoxyethylene sorbitan monolaurate, and 3 parts of sorbitan monolaurate, and then finely ground to less than 5 μm using a jet mill. 2 parts of white carbon and 5 parts of white carbon are added and the following treatment is carried out in the same manner as in Example 1 to obtain a viscous suspension of the present invention. Shake this suspension thoroughly before use. 600~10 with water
Dilute to 00 times and use appropriate RF! ! Spray on the plants at a rate of 710 ares per 80 to 350 m using a cloth utensil.

Patent applicant: Hokuko Chemical Industry Co., Ltd. 42

Claims (1)

[Claims] A sterilizing composition for agricultural and horticultural use, characterized by blending highly refined machine oil with a sulfonation value of 10 or less and kasugamycin.