JPS62267208A - Herbicide for lawn - Google Patents

Abstract

PURPOSE:To provide the titled herbicide containing an active component produced by mixing bensulide and MCPA, exhibiting high herbicidal activity against all kinds of weeds including broad-leaved weeds such as shepherd's purse, etc., and having broad margin of application time. CONSTITUTION:The objective herbicide contains an active component consisting of a mixture of (A) bensulide (O,O-diisopropyl-S-(2-phenylsulfonylaminoethyl) phosphorodit-hioate) effective against gramineous weeds and (B) MCPA [(4- chloro-o-tolyloxy)acetic acid] effective also against broad-leaved weeds. It is applied either by soil-treatment or foliar treatment. Foliar treatment of weeds after sprouting is also possible. It can be used for lawn of gold link, green field of park, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION *Field of Industrial Application The present invention relates to a herbicide for lawns used on lawns such as golf courses and park green spaces.

*Conventional technology As a herbicide for lawns such as golf courses and park green spaces, Bensuride, i.e., 0.0-diisopropyl-8-(2-)T-nylsulno-A dilylaminoedil), small sulforodithi-A soil, etc. , is more widely used than before.

Problems that the Nido Invention aims to solve The above-mentioned Benslide can be safely used on Japanese grasses such as Coralysia grass, as well as Western grasses such as Bermuda grass, ryegrass, and bentgrass. An excellent lawn herbicide that is highly effective. However, although there are many different types of weeds in lawns, Benslide is considerably less effective against broad-leaved weeds such as shepherd's purse and Imenoptera (Section 1.3).
．． Figure 5), to deal with this, there was a problem that it was necessary to apply C in layers with different herbicides.

In addition, regarding the relationship between weed growth streaks and herbicidal effects, Bensuride is suitable for soil treatment before weed germination, but
There is also the problem that the weeding effect of stem vegetables 98C is inferior after the weeds have germinated (Figure 3).

The present invention has been made in an attempt to solve the above-mentioned problems with Benslide.

*Means to Solve the Problems In order to solve the problems described in F, the present invention uses MCPA, which is also effective against broad-leaved weeds, namely (4-chloro-
The present invention provides a herbicide for lawns, which is prepared by mixing 0-tolyloxy) acephic acid with Bensuride.

*Examples In the examples below, Bensuride is an emulsified oily liquid with an active ingredient content of 50%, and MCPA is a water-soluble liquid with an active ingredient content of 19.5%. In addition, the amounts used for benslide and MCPA shown in this specification are the amounts of their respective active ingredients (per 10a). It goes without saying that the present invention is not limited to the following examples.

Example 1 250 g of Benslide and 200 g of MCPΔ were mixed,
O-leaf Wj (Refers to the O-leaf stage of the weed grasshopper. The same applies hereinafter.) Place! A lawn herbicide for (pre-emergence soil treatment) was obtained.

Example 2 Benslide 500 ff and MCPA 200y were mixed to obtain a lawn herbicide for treatment during the dry season.

Example 3 750 g of Benslide was mixed with CPΔ2009 to obtain a herbicide for lawn plow 1 for treatment at the 1.5-leaf stage (referring to the 1°5-leaf stage of the weed grasshopper. The same applies hereinafter). .

*Testing for herbicidal effect Next, we tested Benslide (alone), MCPA (single), and the combination herbicide of Poly-Benslide and MCP△ in each of the above examples. I will explain about the effectiveness test.

☆Test weeds In this test, d3 (upper, rice 4) were used as grasses (Mehishiba, Japanese commonweed, Psyllium japonica, and Japanese cypress were used as grasses, and as broad-leaved weeds were A. japonica, Shepherd's purse, Shiroza, and Japanese pufferfish were used.

☆Test method (△) For figures 1 to 4, fill a 10ax 1/14.800 vat with field soil,
Various weed seeds were mixed and leveled on the surface layer 1 r and m. Each herbicide was diluted 6 times in 200μ (per 10a) of water and sprayed at the O-leaf stage and 1.5-leaf stage of the crabgrass. Lost i1 2
A survey was conducted after one day had passed.

(13) Go to No. 5 - In the case of Figure 6, fill a 10ax 1/60.000 hat with field soil,
Various weed seeds were mixed on the surface layer 1 cm and leveled. Each herbicide was stirred in water at 200°C (per 10 a) and treated with soil. An investigation was conducted 45 days after treatment.

☆Test results (Δ) 1st to 1st figure (Δ to 1) 0 confectionery period]! l (Figures 1 and 2) Bensuride (250Sj, alone) 1 has a weeding effect on grass weeds such as crabgrass, but its effect on broad-leaved weeds such as shepherd's purse and dogfish was considerably inferior. (
Figure 1). M CF) △ (200y, alone) 2 had excellent herbicidal power against broad-leaved weeds such as shepherd's purse and dogfish, respectively, but was slightly less effective against grass weeds such as crabgrass and sycamore. figure). However, Benslide 2509 and MCI) Δ200
Lawn herbicide 33 (Example 1) prepared by mixing -C with -C showed excellent weed control on both grass weeds and broad-leaved weeds (Figure 2).

(Δ-2) Treatment at the 1.5-leaf stage of crabgrass (Go to Figures 3 and 4) Bensuride (7!″lOJ, alone) 4 is slightly less effective against grass weeds such as crabgrass, and especially against Japanese sandweed and dogfish The effect was extremely poor (Figure 3).M
CP△ (200S?, alone) 5 had extremely poor effects on grass weeds such as Japanese grass weed and Japanese sagebrush, but showed excellent effects on broad-leaved weeds such as Japanese apricot, shepherd's purse, and white locust (No. 4) figure). However, Benslide 750
Lawn herbicide 6 made by mixing 9 and 200g of MCPA
(Example 3) shows an excellent effect on broad-leaved weeds such as 750g, shepherd's purse, and whiteweed, and also shows excellent effects on grass weeds such as C. 200g (single) 5
The weeding power was significantly higher than the previous one (Fig. 4).

(F3 > Go to Figure 5/6 (B-1) Soil treatment Benslide (250!?, alone) 1' and Benslide (500g, alone) 7 are less effective against shepherd's purse and dogfish, but such as It showed excellent effects against grass weeds (Fig. 5).

~IC)) Δ(200!7, Ili Germany) 2' showed excellent effects against Kogomega Anoturi and Aobi 1, but
The effect against other weeds was slightly inferior.

However, Benslide 2509 and MCP△200
Lawn herbicide 3' (Example 1), which is a mixture of Penthride 50 (EJ) and MCP△2009 (Example 2), is effective against almost all weeds. It showed excellent weeding power (Figure 6).

Effects of the present invention The lawn herbicide prepared by mixing Benslide and MCPA according to the present invention has a d3 effect on foliage and soil treatment.
C also exhibited a synergistic effect due to the combination of both disputants. In other words, the above-mentioned problem with Benslide, which is that it is less effective in dealing with broad-leaved weeds such as shepherd's purse and dogfish, has been solved, and its weeding ability against all kinds of weeds has been greatly improved, and the herbicidal spectrum has been significantly expanded. It has become possible to deal with all types of weeds using only the herbicide of the present invention. In addition, the range of appropriate treatment periods has been expanded, making it possible to treat the shoots and leaves of weeds as soon as they germinate. One of the reasons for this excellent effect is
This is thought to be because the solvent in Bensuride facilitates the absorption of MCPA into the plant body, making it easier to express the synergistic effect within the plant body.

[Brief explanation of drawings]

Figures 1 and 2 are graphs showing the herbicidal effects of various lawn herbicides applied during treatment during the crabgrass season using a certain test method. Figure 2 shows the effect of MCPA (200g, alone)
and shows the herbicidal effect of the lawn herbicide of Example 1. -〇- Figures 3 and 4 are graphs showing the herbicidal effects of each lawn herbicide applied to the 1st and 5th leaf stage treatment of crabgrass using the same test method. 7509, alone)
Figure 4 shows the herbicidal effects of MCPA (200 g, alone) and the herbicide for lawn 1 of Example 3. Figures 5 and 6 are graphs showing the herbicidal effects of each lawn herbicide applied to soil treatment using different test methods. (
Figure 6 shows the herbicidal effect of MCP 50 (EJ, alone).
The herbicidal effects of A (2009, alone), the lawn herbicide of Example 1, and the lawn herbicide of Example 2 are shown. 1.1-: Ben Ride (2 boats) 09, solo) 2.2-
: MCPA (200y, alone) 3.3-: Lawn iI herbicide of Example 1 4: Bensuride (7'509, alone) 5: MCPΔ
(200y, alone) 6: Lawn herbicide of Example 3 7: Bensuride (50o9, alone) 8; Lawn 4V herbicide of Example 2 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A lawn herbicide made by mixing Benslide and MCPA.