FI70771B - BLADE EQUIPMENT FOR THE PURPOSE OF OPERATING CONDITIONS - Google Patents

Description

1 70771

This invention relates to a foliar herbicide composition. In particular, this invention relates to a composition for controlling herbaceous weeds in the cultivation of 1- and / or 2-locust, especially cruciferous crops such as rape, oilseed rape and cabbage.

In particular, one of the obstacles to the expansion of oilseeds such as oilseed rape and oilseed rape has been the lack of an effective foliar herbicide for a wide range of weeds.

Oilseeds and other cruciferous plants are cultivated on all soil types and are suitable intermediate crops in the crop rotation.

There are several dozen different weeds in the crops.

Currently available soil and foliar herbicides and mechanical weed control methods are not sufficient to control weeds from growing cruciferous crops. The disadvantage of soil herbicides is that they are not sufficiently effective in soil-containing soils and the spray treatment must be carried out before sowing the crucifers, in which case the need for control is not yet known.

Of the known pesticides, 3,6-dichloropicolinic acid is a selective systemic foliar herbicide that acts only on weeds of the family Compositeae (mycorrhizal). The application rate is 150 g active ingredient / ha. Benazoline, on the other hand, has a limited potency: Matara (Galium spp.) And Stellaria spp. 2 70771 belong to the range of potencies, with a systemic and selective foliar effect. The application rate is 400-60U g of active ingredient / ha. Metazachlor is a foliar and soil-action systemic herbicide sprayed on leaves or soil. The application rate is 1500 g / ha.

All of these substances have a number of disadvantages, such as: thereby contaminating crops.

The increase in usage increases costs and it is not possible to exceed the approved usage. In addition, increasing the amount of use would significantly increase the risk of damage to the actual crop.

It has now surprisingly been found that metazachlor is synergistic with benazoline and 3,6-dichloropicolinic acid when sprayed on herbaceous weeds in crops. Even a small amount of metazachlor, together with benazoline and 3,6-dichloropicolinic acid, when appropriately formulated and sprayed as an aqueous mixture with a suitable wetting agent, increases the efficacy of these herbicides in a rapeseed rapeseed crop to such an extent that the interaction is synergistic.

Metazachlor, on the other hand, is ineffective on weeds when used in small amounts.

3 70771

The benazoline used in the pesticide composition of the present invention is 4-chloro-2-oxobenzothiazolin-3-ylacetic acid of the formula

Cl

-OF. CH COOH I

2

S

and is manufactured by FBC Limited (England) under the trademark "Legumex".

The metazachlor used in combination with benazoline in the pesticide composition of the present invention is 2-chloro-N- (2,6-dimethylphenyl) -N- (1H-pyrazol-1-ylmethyl) acetamide of formula

H C

/ i ~ \ f

C) - N - C - CH - Cl II

V— / CH

\ I 2

H N

‘/ \ And manufactured by BASF AG (Federal Republic of Germany) under the trade mark" Butisan s ".

The 3,6-dichloropyric acid used in the pesticide mixture of benazoline and metazachlor of the present invention is 3,6-dichloropyridine-2-carboxylic acid of formula 4,70771

I III

L i-COOH Cl N

by Dow Chemical Co. (USA) manufactures under the trademark "Matrigon".

The best overall effect against uniform weeds is obtained with a pesticide mixture containing metazachlor, benazoline and 3,6-dichloropicolinic acid in a weight ratio of about 5: 1: 1.

When assessing synergism, the S.R. In Colby's "Weeds" 15 (1967): 1, p. 20-22, for the triple compounds: (X) (Y) (Z) 111 E = __, where 10,000 E = expected% inhibition of growth and 1 X, Y and Z are the individual potencies of the active ingredients in%. 112

At the same time, it has been found that the known potency of any of the active substances in question on susceptible weeds has not been reduced or that a reduction in the amount of active substance has reduced the potency on benazoline-sensitive weeds (eg stellaria spp. And Galium spp.). No detrimental effect on crops has been observed.

In addition, the soil effect of metazachlor prevents weed germination after pesticide spraying.

5 70771

Due to the interaction, the effect of the herbicide combination increases on weeds for which the individual substances have no effect.

Among these weeds, e.g. Polygonum spp., ga-leopsis spp. and spergula spp. The mixture can be sprayed as an aqueous suspension or brushed with known application equipment with cross-flowering cultivation patterns at leaf stage 2-8.

The active compound mixture according to the invention can be prepared in various product forms, such as solutions, emulsion concentrates, suspensions, powders, pastes and granules. The uses depend entirely on the intended use. These are prepared in known ways, e.g. by mixing active ingredients and additives, i.e. liquid solvents, liquefiable gases under pressure and / or solid carriers, optionally using surfactants, i.e. emulsifiers and / or dispersants and / or blowing agents. If water is used as an additive, e.g. organic solvents can be used as co-solvents. However, it is also possible to prepare concentrates of the active ingredient, emulsion or dispersant and, if appropriate, solvent, which are suitable for dilution with water.

Suitable liquid solvents are, in particular, aromatic solvents, such as xylene, toluene, polyterpentines, benzene or alkylnaphthalene, chlorinated aromatic or chlorinated aliphatic hydrocarbons, such as chlorobenzene, chloroethylene or methylene chloride and methylene chloride, aliphatic hydrocarbons, aliphatic hydrocarbons, such as. alcohols such as butanol and glycol as well as their ethers and esters, ketones such as acetone, methyl ketone or cyclohexanone, strongly polar solvents such as dimethylformamide and dimethyl sulfoxide as well as water. As solid carriers, natural stone flour such as kaolin, clay, talc, chalk, quartz, attapulgite, montmorillonite or diatomaceous earth and synthetic stone flour such as highly dispersed silica, alumina and silicate can be used. Suitable emulsifiers are, for example, polyoxyethylene fatty acid esters or ethers, alkyl and aryl sulfonates and alkyl sulphates. Typical dispersants are lignin, sulphite waste liquor and methylcellulose. Other known active ingredients can also be added to the active compound combinations according to the invention, such as, for example, insecticides, fungicides, graminisides, herbicides, growth regulators, antidotes and plant nutrients, evaporation inhibitors or soil improvers.

The invention is described in more detail below by means of examples. Example 1

Rapeseed weed control test.

The following weeds: chenopooium album, stellaria media, niatricaria dioeca, tripelurospermum inodorum, spergula arvisis, galeopsis spp., Polyconum spp., Viola spp., Vicia spp., Fumaria officinalis and myosotis arvensut experimental agents. Wetting agents were added to the aqueous pesticide solution. The weed count was performed after 6 weeks. For weighing the residual weed biomass, the samples were dried for 24 h at 105 ° C. The weed area was 2 0.25 m / fold. All treatments were randomized to blocks. The treatments were repeated 4 times. The results are shown in Table 1 below.

7 70771

Table 1.

Rapeseed weed control test

Break down Rich- Rapeseed yield remaining power% kg / ha

Metazachlor + benazoline + 3,6-dichloropicolinic acid 759 g + 150 g + 150 g / ha 20.4 75.57 1433 x

Metazachlor 750 g / ha 83.6 -0.12 1440

Benzoline 150 g / ha 78.6 5.87 1481 3.6-dichloropicolinic acid 150 g / ha 47.5 43.11 1457

Comparison of substances 288 g benazoline + 3.6-dichloropicolinic acid 48 g / ha 36.9 55.8 1431

Metazachlor 1500 g / ha 52.5 37.13 1356 Untreated 83.5 0.0 1432 x

Not significantly different from untreated.

The following results were obtained from the values in Table 1: 8 70771

Active substance g / ha herbaceous biomass plant amount% power%

Metazachlor + benazoline + 3,6-dichloropicolinic acid 750 + 150 + 150 24.43 75.57

Metazachlor 750 g 100.12 -0.12

Benazoline 150 g 94.13 5.87 3.6-dichloropicolinic acid 150 g 56.70 43.11

The amount of weed biomass and the% of weed power are the weight reduction of weed 2 plant biomass in g / m compared to the untreated.

100 x 94 x 57 E = = 53.58% 1 - 10,000 and 100 - E = 46.42% calculated power% 75.57% observed power% and 75.57 - 46.42 = +29% synergism after the addition of 750 g of metazachlor to a mixture of benazoline and 3,6-dichloropicolinic acid.

Example 2

Rapeseed herbicide test.

The same weeds as in the experiment of Example 1, except for matricaria dioeca, Vicia spp., And myosotis arvensis, averaged 183 / m ^ The experimental procedure was the same as in Example 1 except that there were 2 multiples. The results are shown in Table 2 below.

70771 9

Table 2.

Rich- Rapeseed yield% kg / ha I Metazachlor + II benazoline + II 3,6-dichloropicolinic acid 625 g + 125 g + 125 g / ha 63.6 2477 I + II + III 1250 g + 250 g + 250 g / ha 88 , 4 2328 Untreated 0.0 2339 It is clear from this example that the mixture according to the invention does not adversely affect oilseed rape either, although at the same time it destroys the weed.

Example 3

The mixture according to the invention was also compared with a mixture of benazoline and 3,6-dichloropropionic acid. The mixtures were used to treat weeds in the garden land without shading useful crops. The results are given as the averages of the four blocks, and it can be seen from the results shown in Table 3 below that the amounts of weeds differ significantly between the different treatments and that a clearly better result is obtained for the mixture according to the invention.

Table 3 Treatment 1. metazachlor + benazoline + 3,6-dichloropicolinic acid, 750 g + 150 g + 150 g / ha 2. benazoline + 3,6-dichloropicolinic acid, 150 g + 150 g / ha 3. Untreated Treatment Sulfur content Power Dry crop yield Power pcs / m2% g / m2% 1,108 63.02 14.6 72.50 2,188 35.62 28.9 45.57 3,292 - 53.1