JPS5948807B2 - Acaricide, insecticidal composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acaricidal and insecticidal composition for controlling mites and/or pests.

Mites are found on citrus fruits, various fruit trees such as apples and pears, vegetables such as strawberries, eggplants, and watermelons, carnations, roses, etc.
It parasitizes flowers such as chrysanthemums and leaves of tea plants, causing great damage to these crops.

Currently, a large number of acaricides are commercially available for use in controlling mites under the trademarks of Kelsen, Citrazine, Tedeon, Danicut, Brictran, and the like.

However, the generation period of mites is short, and the number of generations per year reaches more than ten.

Therefore, the number of times they are controlled is increased, and they are more likely to develop resistance than other pests, making their control a major problem.

Therefore, in order to avoid the development of resistance, it is considered to avoid repeated use of the same drug as much as possible, and to control by rotating drugs with different mechanisms of action, or by using mixtures thereof.

In addition, many pests other than mites parasitize and damage the various agricultural crops mentioned above, but there is a large selective toxicity between mites and mixed insects, and there are almost no drugs that are effective against both.

Therefore, acaricides and insecticides are generally used in combination to control mites and pests at the same time.

An object of the present invention is to provide an acaricidal and insecticidal composition that exhibits a synergistic control effect against both insects and insect pests by incorporating specific agents.

The present invention provides S-[(2-methoxy-5-oxo-1,3,
Contains 4,-thiadiazolin-4-yl)methyl 0゜0-dimethylphosphorothiolothione) (hereinafter referred to as DMTP) and p-chlorophenyl p-chlorobenzenesulfonate (hereinafter referred to as CPCBS) as active ingredients. This is an acaricidal and insecticidal composition characterized by the following.

DMTP is expressed by the following formula (1), and is effective against pests, but has low effectiveness against mites.

CPCBS is expressed by the following formula (2), and exhibits some degree of egg-killing and adult-killing power against mites, but is ineffective against pests.

In the present invention, by blending these drugs, the drawbacks of each are compensated for and synergistic acaricidal and insecticidal effects are exerted.

The blending ratio of DMTP and CPCBS is 1=5 to 5 by weight.
A range of :1 is desirable, and a range of 1:2 to 2:1 is particularly preferred.

The acaricidal and insecticidal composition of the present invention can be formulated by mixing these two types of active ingredients, but in addition to these active ingredients, carriers, diluents, surfactants, dispersants, other auxiliaries, etc. It can be formulated into aquariums, emulsions, powders, flow dusts, etc.

These preparations can be sprayed directly or diluted with water to an appropriate concentration and used.

Good effects can be obtained when the concentration is 250 to 500 ppm.

As carriers, talc, kaolin, bentonite, diatomaceous earth, white carbon, clay, starch, etc. can be used, as diluents, water, xylene, toluene, chlorobenzene, cyclohexane, alcohol, etc. can be used, and surfactants,
Commercially available dispersants can be used.

The acaricidal and insecticidal components of the present invention are other acaricides, insecticides,
It can also be used in combination with disinfectants and the like.

The acaricidal and insecticidal composition of the present invention has synergistic acaricidal and insecticidal effects, and exhibits a more remarkable control effect than when each active ingredient is used alone.

And the effect lasts for a long time, making it difficult for resistance to develop.

In particular, it has a high control effect against insects and mites, and its ovicidal and adulticidal powers increase synergistically.

In addition, the insecticidal efficacy is synergistically increased against pests such as citrus lily bugs, apples, tea worms, and vegetables ``spodoptera.''

Next, preferred blending examples of the present invention will be described, but additives and blending ratios may be varied within a wide range.

All blending ratios are expressed in weight %. Formulation example l Wettable powder DMTP 25%, CPCBS 25%, wetting agent Tsurupol 35 s-L (Toho Chemical KK registered trademark) 3%, Discsol WK (Daiichi Kogyo Kagaku KK registered trademark) 3%, auxiliary Carplex (Shionogi & Co., Ltd. KK registered trademark) No. 5 as an agent and Radiolite (Showa Kagaku KK registered trademark) No. 39 as a carrier are uniformly mixed and pulverized to obtain an irrigation agent.

Formulation example 2 Emulsion DMTP 25%, CPCBS 25%, xylene 40% as diluent, Trupol 3001 as emulsifier
10% is uniformly dissolved to form an emulsion.

Formulation example 370-Dust DMTP 10%, CPCBS 10. %, isopropylhydrodanephosphate 2% Carplex 30% as adjuvant, Zikryte 5G-9 as carrier
0 (Ziklite Chemical Mining KK registered trademark) is mixed and pulverized to form flow dust.

Next, the effects of the acaricidal and insecticidal composition of the present invention will be shown by test examples.

The tested drug was formulated according to the following formulation example (% by weight).

Test Example 1. Control effect test on black-and-white spider mites. 50 ml of an irrigation agent solution with a prescribed concentration (the same concentration below DMTP and CPCBS) was thoroughly sprayed with a spray can on eggplants planted in 4-inch pots that were infested with white-throated spider mites, and We investigated the number of living adults.

The results are shown in Table 1.

For comparison, the commercially available acaricide Kelton [ROHM・
&)・-S Company Registered Trademark-Active Ingredients 2.2.2-)
[Lichlorol, 1-bis(p-chlorophenyl)ethanol] The results with and without spraying are also shown.

Test Example 2 Ovicidal efficacy test against false red spider mite Spraying 30 rnl of emulsion at a predetermined concentration per pot onto the eggs of false red spider mite that have settled on green bean leaves in a greenhouse t ~ 1
The ovicidal rate was examined after 0 days.

The results are shown in Table 2, and the concentration is 250 ppm.
Figure 1 shows a graph of blending ratio vs. ovicidal rate in the case of .

Table 2 also shows the results in the case of Kelton scattering.

Test Example 3 Adulticidal efficacy test against false spider mites A 30ml solution of a predetermined concentration of wettable powder per pot was sprayed on adult false spider mites parasitized on green bean leaves in a greenhouse, and the number of living and dead insects was determined after 3 days. Daki rate was calculated.

The results are shown in Table 3, and the concentration is 250 ppm.
A graph of blending ratio vs. acaricidal rate is shown in FIG. 2.

Table 3 also shows the results in the case of Kelsen dispersion.

: Test Example 4 Mandarin orange - Control effect test against mites Mandarin orange - 50 rnL of a predetermined concentration solution of a hydrating agent was thoroughly sprayed with a spray gun on summer fruit seedlings planted in 4-inch pots that were infested with mites, and over time, the number of live and adult mites increased. I looked up the numbers.

The results are shown in Table 4.

The results with and without Kelsen spraying are also listed.

Test Example 5 Control effect test against Kanzawa spider mite A predetermined concentration solution of an irrigation agent was sprayed at a rate of 400 per 10 ares on tea plants infested with Kanzawa spider mites, and the number of inhabiting adult insects was examined over time after spraying.

The results are shown in Table 5.

The results with and without Kelsen spraying are also listed.

Test Example 6 Control effect test on Kelsen-resistant two-spotted spider mites Infested with Kelsen-resistant two-spotted spider mites, sufficiently sprayed 50 rIxl of a predetermined concentration of hydrating agent on apple seedlings with a spray gun, and after spraying, the inhabitation occurred over time. The number of adult insects was investigated.

The results are shown in Table 6. The results with and without Kelsen spraying are also listed.

Test Example 7 Insecticidal Efficacy Test on Kokaku Monbumaki Apple leaves were immersed in a solution of a predetermined concentration of water use agent, placed in an ice cup, and 3rd instar larvae of Kokaku Monbumaki were released there. After 72 hours, the number of live and dead insects was checked to determine the insecticidal rate. I asked for

The results are shown in Table 7, and a graph of blending ratio vs. insecticidal rate at a concentration of 250 ppm is shown in FIG.

For comparison, the results obtained using the commercially available insecticide Cyanox (Sumitomo Chemical KK registered trademark - active ingredient p-cyanophenyldimethyl phosphorothionate) are also shown.

Test Example 8 Insecticidal efficacy test against Yano's Chilling Tit Mandarin orange leaves infested with Yan's Chilling Tit 2nd instar larvae are immersed in a solution of a predetermined concentration of watering agent, and when the untreated plot becomes adults, the number of immature and adult beetles is determined. Growth rate was calculated using the formula.

The results are shown in Table 8. 10 Adults Number of immature adults Growth rate @) □ × 100 Based on the results of the pre-distribution number, DMTP alone has an initial control effect against mites, but it rapidly becomes less effective over time. It can be seen that compared to the case where CPCBS alone is not very effective from the beginning, the combination of both has a remarkable pesticidal effect and the effect lasts for a long time.

It is also found that the pesticidal effect is good when the mixing ratio of both is in the range of 1:5 to 5:1, and particularly in the range of 2:1 to 1:2.

As for the insecticidal effect, the combination of the two shows a more pronounced effect than the combination of the two alone, indicating a synergistic effect.

The present invention has been described above, and the acaricidal and insecticidal composition of the present invention has a remarkable control effect on both mites and pests, and the effect is highly durable.

[Brief explanation of the drawing]

Figure 1 is a graph showing the blend ratio vs. ovicidal rate for Test Example 2 at a concentration of 250 ppm, and Figure 2 is a graph showing the ovicidal rate for Test Example 3 at a concentration of 250 ppm.
Graph showing blending ratio vs. acaricidal rate in ppm, 3rd
The figure is a graph showing the blending ratio vs. insecticidal rate in the case of Test Example 7 at a concentration of 250 ppm.

Claims (1)

[Claims] I S-C<2-methoxy-5-oxo-1,3°4
-thiadiazolin-4-yltmethyl)0,0-dimethylphosphorothiorothionate and p-chlorophenyl p
- A miticidal and insecticidal composition comprising chlorobenzenesulfonate as an active ingredient. The blending ratio of 2B-CC methoxy-5-oxo-1,3,4-thiadiazolin-4-yl)methyl 0.0-dimethylphosphorothiolothionate and p-chlorophenyl p-chloropensene sulfonate is by weight. 1:5~5:l
The composition according to claim 1, which is