JPS5832804A - Agricultural and horticultural germicidal composition - Google Patents

Abstract

PURPOSE:An agricultural and horticultural germicidal composition, containing thiophante-methyl, etc. or benomyl and a calcium compound as active constituents, capable of exhibiting improved cotrolling effects on blights caused by resistant germs of crops, and having a high effect. CONSTITUTION:An agricultural and horticultural germicidal composition thiophanate-methyl (R is CH3 in the compund of formulaI) which is a germicide capable of exhibiting improved effects on the control of blights of grains, vegetables, fruit trees, flowering plants, etc. with high safety for men and cattle from the standpoint of the toxicity or thiophanate (R is C2H5 in the compound of formulaI) or benomyl (the compound of formula II) and a calcium compound as active constituents. Calcium chloride, calcium carbonate, calcium secondary phosphate, etc. may be used as the calcium compound. The mixture is directly or mixed with various carriers or assitants and formulated, and effective for controlling powdery mildew of cucumbers and tomatoes, gray mold of kidney beans, etc., and applied to the disinfection of seeds or soil.

Description

Detailed Description of the Invention The present invention provides a compound represented by the general formula (wherein R represents a methyl group or an ethyl group) (hereinafter, a compound where R is a methyl group is referred to as thiophanate methyl, and when R is an ethyl group, it is referred to as thiophanate methyl). )
The present invention relates to a fungicide composition for agricultural and horticultural use that is characterized by containing a compound represented by the formula % or formula % (hereinafter referred to as benomyl) and a calcium compound as active ingredients, and is highly effective and practically excellent. The purpose of this invention is to provide a disinfectant.

Compounds (T) and (IO represented by the above general formula) are fungicides that exhibit excellent control effects even when used alone for controlling diseases of grains, vegetables, fruit trees, flowers, etc., and are effective against humans and livestock. It is extremely safe in terms of toxicity and is currently widely used to control a wide range of diseases.On the other hand, the emergence of diseases and resistant bacteria that are not effective with this compound alone has made it difficult to actually control it. There are problems such as decreased efficacy. It is of practical importance to elucidate ways to avoid the development of resistant bacteria to compounds (1) and (In). It has generally been proposed to use it in combination with or alternately spraying, and there are many examples of success to some extent.However, this has not yet been fully resolved.

The present inventors have conducted various studies to obtain a control effect that is effective against diseases caused by resistant bacteria by using the present compound in combination with other drugs. Application to 1: Compared to the effect of single use of each compound,
Calcium compounds that are applied at the same time include calcium acetate, calcium diphosphate, calcium carbonate, Calcium chloride, calcium citrate, calcium phosphate dihydrate, calcium hydroxide, calcium hydrogen phosphate, calcium chloride sulfate, calcium cyanamide, etc. are included, but mixtures of these may also be used. In actual application, in order to make it easier to use as a pesticidal agent,
Can be mixed with carriers and active agents and other additives;
Usual forms of use of pesticides, such as wettable powders, emulsions, granules,
It can be used in the form of powder, flowable, etc. Examples of carriers used include clay, talc, diatomaceous earth,
Bentonite, white carbon, etc. are used. The above-mentioned products can be diluted with water or sprayed as they are, and the composition of the present invention can also be used to disinfect seeds or applied to soil.

Furthermore, the composition of the present invention may be mixed with other agents such as fungicides, insecticides, acaricides, herbicides, plant growth regulators, spreading agents, and fertilizers during application. It is also possible to apply it.

Some test examples regarding the pest control effect of the composition of the present invention are shown below.

KM Example 1゜A control test was conducted using the composition of the present invention against cucumber powdery mildew, which is resistant to the present compound. A chemical solution of a predetermined concentration was sprayed on potted cucumber seedlings (variety: Sacchimidori), and 3 days later, conidia of resistant powdery mildew were inoculated. Chemical spraying 1
After 5 days, the degree of disease onset was investigated and the control value was calculated from comparison with the unsprayed area. The results are shown in Table 1.

Table 1 Test Example 2. A control test of the composition of the present invention against naturally occurring tomato powdery mildew was conducted. A chemical solution of a predetermined concentration was sprayed on tomato seedlings (variety: Daigo Fukuju) in a greenhouse where the disease was progressing, and a second similar spraying was performed 7 days later. Seven days after the second spraying, the rate of diseased leaves and severity of disease were measured, and the control value was calculated from comparison with the non-sprayed area. The results are shown in Table 2.

Table 2 A control test of the composition of the present invention against gray bean gray mold was conducted. In the potted green beans (variety: Nagausura) fungus,
A predetermined concentration solution of the composition of the present invention is sprayed and kept in a greenhouse for 7 days, after which the treatment agent is cut off and placed in a greenhouse petri dish.Bacteria susceptible to and resistant to the compound of Botrytis clnerea Inoculate each mycelia at 20”C.
After keeping it for 4 days, the degree of disease onset was investigated, and the control value (4) was calculated based on the lesion area of the untreated control plot. The results are shown in Table 3.

Table 3 Applicant: Nippon Soda Co., Ltd. Agent Haruyuki Ito Same Yoshimi Yokoyama

Claims (1)

[Claims] Contains a compound represented by the general formula S 1 1 (wherein R represents a methyl group or an ethyl group) or a compound represented by the formula % and a calcium compound as active ingredients. An agricultural and horticultural fungicide composition characterized by: