JPH07138104A - Seed disinfectant - Google Patents

Abstract

PURPOSE:To obtain a seed disinfectant having high activity against bakane disease of rice plant. CONSTITUTION:This seed disinfectant contains 2-chloroethyltrimethylammonium chloride as an active ingredient.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seed disinfectant containing 2-chloroethyltrimethylammonium chloride (hereinafter also referred to as chlormequat) as an active ingredient.

[0002]

2. Description of the Related Art Fusarium moniliforme (Fusa)
Rium moniliforme is a filamentous fungus that causes diseases in various plants, and this Fusarium moniliforme is distributed worldwide. In Japan, rice bacillus seedling disease, rice plant blight, soybean wilt disease, maize red mold disease, and cotton wilt disease are known, and especially rice sprouting disease is one of the important diseases. This disease is known to transmit seeds,
Seed disinfection is one of the important tasks in rice cultivation. In the past, this disease was controlled by disinfecting seeds with a mercury agent, but after the use of the mercury agent was stopped, benzimidazole-based agents became the mainstream. However, the control effect was reduced due to the emergence of benzimidazole-resistant bacillus seedling fungi, and ergosterol biosynthesis inhibitors are currently used as alternative agents.

[0003]

Although ergosterol biosynthesis inhibitors are highly effective against rice scab seedling disease, there is concern that resistant bacteria may be expressed as a fungicide. When resistant bacteria develop, there is no other effective drug. The purpose of the present invention is to
It is to provide a safe and effective seed disinfectant.

[0004]

Means for Solving the Problems The present inventors have found that when chlormequat, which has been conventionally used as a stem culm elongation inhibitor for wheat, is used as a seed disinfectant for rice, it exhibits high activity against rice scab seedling disease. The present invention has been completed and the present invention has been completed.

That is, the present invention is a seed disinfectant characterized by containing 2-chloroethyltrimethylammonium chloride (chlormecote) as an active ingredient.

The seed disinfectant of the present invention can be used not only for rice seeds infected with benzimidazole-sensitive rice bacillus seedling disease fungi,
It is also effective against paddy infected with benzimidazole-resistant bacteria.

As a disinfection method, for example, the seed disinfectant of the present invention is diluted with water, and the resulting solution (usually 200 to 20000) is diluted.
ppm, preferably 500 to 2000 ppm).

According to these methods, when the seed disinfectant of the present invention is used, even if a known seed disinfectant is used, resistant bacteria appear and the disinfection effect is insufficient. It will come into effect.

Further, even if the conventional inhibitor alone cannot provide a complete controlling effect against rice scabbed seedling disease, the addition of the present compound can be expected to bring about a complete effect.

Furthermore, when used in the above method, the seed disinfectant of the present invention is a seed disinfectant which is extremely safe in practical use because it does not harm rice and has low toxicity to fish. sell.

When the chlorme coat according to the present invention is used as a seed disinfectant, it can be used by formulating it into a generally used form such as a liquid agent.

The content of chlormequat according to the present invention in the seed disinfectant is suitably 10 to 50% by weight (% by weight) of the total amount of the preparation. In addition, the compound of the present invention can be used as a mixture with other seed disinfectants in order to save labor and ensure control effect.

Further, the seed disinfectant of the present invention may be mixed with other bactericidal components, insecticidal components, plant growth regulating components and the like.

[0014]

EXAMPLES Examples will be specifically described below.
The present invention is not limited to the examples below.

Example 1 Chlormecoat 46 parts Water 54 parts The above components are mixed and dissolved to obtain an aqueous solution.

This is diluted 10 to 1000 times with water,
The rice seedling disease can be controlled by immersing the seed paddy in a liquid having a volume 1 to 2 times the weight of the seed paddy for 10 minutes to 48 hours.

[0017]

The effectiveness of the compound of the present invention as a seed disinfectant will be described below with reference to test examples.

Test Example 1 A rice variety was inoculated with a fungus seedling disease fungus during the flowering period of Nihonbare, and the harvested rice was soaked in an aqueous solution of chlormecote for 24 hours and then soaked in water for germination. The seedlings were sown in a soil for raising seedlings, and the number of diseases was investigated at the 4th leaf stage to determine the control effect. As shown in Table 1, chlormecote significantly suppressed the occurrence of rice scab seedling disease in the nursery box and showed a high effect.

[0019]

[Equation 1]

[0020]

[Table 1]

Test Example 2 Seed disinfection was performed in the same manner as in Test Example 1 using a rice variety, Koshinishi (inoculated paddy as in Test Example). As shown in Table 2, the germination of rice scab seedlings was suppressed by disinfecting the seeds with chlormecote.

[0022]

[Table 2]

Test Example 3 A rice variety, Koshinishi (the same paddy as in Test Example 2) was used, added to a seed disinfectant for rice, and seed disinfected in the same manner as in Test Example 1. As shown in Table 3, the rice seedling disease was completely controlled by adding it to a known seed disinfectant.

[0024]

[Table 3]

Claims (1)

[Claims] 1. A seed disinfectant comprising 2-chloroethyltrimethylammonium chloride as an active ingredient.