DK145214B - PROCEDURE FOR COMBATING INJURY INSECTS AND INSECTIVE MEDICINE TO EXERCISE THE PROCEDURE - Google Patents

Description

(W)

as) DENMARK nEV

(12) PUBLICATION MANAGEMENT OR 1452UB

DIRECTORATE OF THE PATENT AND TRADEMARKET SYSTEM

(21) Application No. 185/77 (51) | nt.CI.3 A 01 N 47/24 (22) Filing date J311 · 1977 (24) Running day 18 Jan · 1977 (41) Aim. available 19 * Christmas. 1978 (44) Submitted 11 · · 1982 (86) International Application No. "(86) International Filing Day" (85) Continuation Day "(62) Master Application No." (30) Priority "(71) Applicant FISONS LIMITED, London, GB .

(72) Inventor Quinton Ashton Geering, GB.

(74) International Patent Bureau.

(54) Method of combating harmful Insects and no means for carrying out the procedure.

The present invention relates to a method for controlling harmful insects in places that are attacked or exposed to them, which is characterized by adding to that site: (A) 2,2-dimethyl acid. 1,3-benzodioxol-4-yl-N-methylcarbamate and (B) 2-methyl-2- (methylthio) propionaldehyde-O-methylcarbamoyloxime (aldicarb).

In addition, according to the invention, there is provided an insecticidal agent for carrying out the method, which is characterized in that it comprises (A) and (B).

The method and agent of the invention are unexpectedly advantageous.

D

145214 2 like. Components (A) and (B) are synergistic in that they are surprisingly effective. The method and the agent achieve a greater insecticidal effect, e.g. against harmful insects that attack crops above the ground than the additive effect of the components concerned. They are particularly useful against harmful insects in crops.

The amount ratio of (A) to (B) may vary over a wide range depending on such factors as the particular site to be treated, the particular harmful insects to be combated, and the particular effect desired. Generally, however, the ratio of (A) to (B) may be e.g. from 1:20 to 5: 1. Usually there is a greater amount of weight of (B) than of (A). Preferably, the ratio of (A) to (B) is 1: 1-2.5. Parts, quantities and percentages in this specification are by weight unless otherwise indicated.

The necessary components (A) and (B) may be supplied together in an agent comprising (A) and (B). The agents can be prepared by mixing the ingredients. The agents may first be prepared in the form of concentrates, e.g. contains 0.5-85% of the required components (A) and (B) in total, and these concentrates can be diluted with water or a hydrocarbon, usually water, at the site of application by spraying, usually such that the total concentration of (A) and (B) is 0.02-3%, e.g. 0.1-3%, preferably 0.15-2%. However, in a preferred embodiment, the agents are prepared directly for delivery or application, e.g. in the form of powders or granules. A preferred agent is in the form of a granule containing 1.5-3% (A) and 3-5% (B), e.g. 1.5% (A) and. 3.5% (B).

Thus, in general, the present agent may contain e.g. 0.02-85% total of (A) and (B).

The agents usually contain a carrier and / or a surfactant.

The carrier may be a liquid, e.g. water (for example, the water used to dilute a concentrate for use). An organic solvent may be present with the water, but this is not usually used.

The carrier may be a liquid other than water, e.g. an organic solvent, e.g. a water-immiscible solvent, e.g. a hydrocarbon boiling in the range of 130-270 ° C in which the necessary components are dissolved or suspended. A concentrate containing an organic solvent may contain a surfactant such that the concentrate acts as a self-emulsifiable concentrate when mixed with water.

The carrier may be a solid which may be comminuted. Examples of suitable solids include limestone, clay, sand, mica, chalk, attapulgite, diatomite, perlite, sepiolite, silica, silicates, lignosulfonates and solid fertilizers. The carrier may be of natural or synthetic origin or may be a modified natural material.

Wettable powders that are soluble or dispersible in water can be prepared by mixing the necessary components with or without a carrier with a surfactant. However, the required components are preferably mixed with a solid support to form a powder, powder or granular product. In a preferred process, granules containing (A) and (B) are prepared by (a) dissolving (A) and (B) in a volatile solvent to form a solution containing 10-30% by weight in total of (A) ) and (B), spray the solution onto absorbent granules and evaporate the solvent from the granules to constant weight thereof to form granules which are impregnated throughout with a mixture of (A) and (B], which granules contain 5-15 weight - a total of (A) and (B), or by (b) filling non-absorbent granular grains in a rotating, winged drum, and subsequently filling in the drum, with time intervals between each addition, (i) adhesives, (ii) (A) and (B), individually or in combination, and (iii) absorbent powders to prevent the granules from adhering to each other and to facilitate passage through application apparatus, and then aiming for removal of oversized material, to form granular granules coated with a mixture of (A) o g (B) containing granular grains not exceeding 10% by weight in all of (A) and (B).

The term "surfactant" is used in the broad sense to include materials which are alternately called emulsifiers, dispersants and wetting agents. Such agents are well known in the art of insecticide.

The surfactants used may comprise anionic surfactants, e.g. soaps, fatty sulfate esters such as dodecyl sodium sulfate, octadecyl sodium sulfate and cetyl sodium sulfate, fatty aromatic sulfonates such as alkyl benzenesulfonates or butyl naphthalenesulfonates, more complex fatty sulfonates such as the amide condensation product of oleic acid or N

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The surfactants may also comprise nonionic agents, e.g. condensation products of fatty acids, fatty alcohols or fatty substituted phenols with ethylene oxide, or fatty esters and ethers of sugars or polyhydric alcohols, or the products obtained from the latter by condensation with ethylene oxide or the products referred to as block copolymers of ethylene oxide and propylene oxide .

The surfactants may also comprise cationic agents, e.g. cetyltrimethylammoniumbromide.

Preferred surfactants include fatty alkyl sulfates, alkylarylsulfonates, fatty alkyl ethoxylates, sulfated fatty alkyl ethoxylates, dialkylsulfosuccinate esters, the amide condensation product of oleic acid and N-methyltaurine, lignin sulfonate salts, condensed hydrogen sulfide and formaldehyde

The agents may contain a coating of an adhesive, e.g. a cellulose ether and this may prolong the residual effect by forming a coating and thus inhibit the physical removal of the active ingredients, e.g. as a result of wind, rain or wear and tear.

Instead of adding (A) and (B) together in an agent as described above, they can be administered separately in analogues containing alone (A) or (B), in particular as a complete or part of a chemical insecticide program in a crop season. A preferred order is that (A) is applied at or immediately before sowing a crop, and (B) is applied after the emergence of the crop. Both simultaneous and sequential administration can be used, e.g. a mixture of (A) and (B) applied at or immediately before sowing a crop and (B) applied after the emergence of the crop.

Preferably, a mixture of (A) and (B) is applied or applied.

(A) and (B) can be mixed immediately before use. However, they have conveniently already been mixed.

The agent of the invention may be presented in a single package in which (A) and (B) are already mixed, and furthermore in a single package intended to accommodate (A) and (B), e.g. in the form of agents as described above, in separate containers for mixing (A) and (B), e.g. in a spray tank, for use.

An additional pesticide may be used in conjunction with or in admixture with component (A) or (B). Eg. For example, (A) and (B) can be applied separately and an additional pesticide can be added together with (A). Alternatively, an agent comprising a mixture of (A), (B) and the additional pesticide may be added. Usually, the ratio of (A) to the additional pesticide ranges from 1:10 to 20: 1, e.g. from 1:10 to 10: 1. The additional pesticide may be an insecticide or acaricide. It can also be a molluscicide, e.g. methiocarb (3,5-dimethyl-4-methylthiophenylmethylcarbamate) or methaldehyde, or a nematicide, e.g. phenamiphos (ethyl 3-methyl-4- (methylthio) phenyl-1-methylethyl phosphorus amidate), aldicarb (2-methyl-2- (methylthio) propylideneamino methylcarbamate) or oxamyl (S-methyl-N ', N '-dimethyl-N- (methylcarbamoyloxy) -1-thio- oximidat). The additional pesticide is usually an acaricide, molluscicide or nematodicide.

Fertilizers can be used with the insecticides contained in the composition according to the invention.

Plants, soils, land or water areas or other areas can be treated by the method of the invention. It is preferably carried out outdoors or in greenhouses.

The method and agent of the invention can be used against a wide variety of harmful insects. The method and agent are particularly useful against harmful insects in crops (i.e., desired plants) which may be horticultural crops, but are preferably agricultural crops, e.g. potatoes, maize, sugar beet, cotton, rice, wheat, citrus crops, sugar cane, cabbage crops or tobacco, in particular maize or sugar beet. Thus, the method and agent are preferably used in a place where a crop is growing or growing. The mixture of the present insecticides, or St of them when the second is added later, is applied at or immediately before sowing; it can be incorporated into the soil immediately before sowing. Preferably, both (A) and (B) are applied to the soil when (A) greatly increases the effect of (B).

The method and agent of the invention are useful against soil-borne harmful insects for desired plants, such as larvae of the genus Agriotes, beetle beetle Atomaria linearis,

Symphylans, Collembola and budworm, e.g. Agrotis spp. They are also useful against harmful organisms that attack desired plants above the ground, such as ragweed flies (Pegomyia betae), aphids, e.g. Myzus persicae and Aphis fabae, cicadas, eg rice cicadas, shield lice and wool lice.

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In the method according to the invention, in particular, such amounts are used that hectares are fed 1/4 - 2kg, preferably 3/4 -1kg, in total (A) and (B). Preferably 200-360 g are added, e.g. 240 g, of (A) per per hectare and preferably 400-700 g, e.g. 560 g, of (B) per ml. acres.

The invention is further illustrated by the following example.

Example

The separate and combined effects of (A) 2,2-dimethyl-1,3-benzodioxol-4-yl-N-methylcarbamate and (B) 2-methyl-2- (methylthio) -propionaldehyde-O-methylcarbamoyloxime were determined by attempts at beet. Pelleted sugar beet seed treated with the fungicide thiram (tetramethylthiuram disulfide) was planted in furrows and granules containing (A), (B) or mixtures of (A) and (B) were distributed along the furrows in the amounts of active ingredient listed below. Nothing (A) or (B) was used on control pieces. Each treatment was repeated 5 times and a determination of the number of green aphids (Myzus persicae) was made 6 weeks after seeding. The average number of aphids per ten plants were calculated as the average of the count results for ten plants from 5 repetitive soils, and the number of aphids is listed below as a percentage of the number of aphids on the untreated control plants.

Amount of A Amount of B Aphids as% g / ha_i_g / ha_of control_ 1022 0 19.9 .0 274 100.0 1022. 274 13.9

It is seen that although B alone had no effect, when mixed with A, it diminished the aphid population, a result showing synergism.