CH660110A5 - TRIAZINE AS A PEST CONTROL. - Google Patents

Description

The present invention relates to the use of 2,4,6-triamino-l, 3,5-triazines for the treatment of parts of plants which are brought into the soil, such as tubers, onions or seeds (seeds from cultivated plants) or for seed furrow application for protection this seed and the parts of plants growing from it against phytopathogenic pests.

The 2,4,6-triamino-1,3,5-triazines to be used according to the invention have the formula

A

N N

I II (I),

HJ- «« -NHR,

2 \\ / 1

N

wherein Ri is cyclopropyl (compound A) or isopropyl (compound B).

2nd

5

10th

15

20th

25th

30th

35

40

45

50

55

60

65

3rd

660 110

Compound A of formula I, wherein Rj is cyclopropyl, is in DOS 2 736 876 and compound B of formula I, wherein Rj is isopropyl, is in J. Med. Chem. 10 (1967), 457 as an insecticide described.

Surprisingly, it has now been found that after the treatment (dressing) of seeds or after the seed furrow application with the two compounds of the formula I, not only the seeds such as tubers, onions or seeds, but also the parts of the plants growing therefrom before being damaged by eating and sucking insects or representatives of the order Akarina remain protected for a longer period.

According to the invention, the use of 2,4,6-triamino-1,3,5-triazines of the formula I for controlling insects and representatives of the Akarina order is therefore proposed, which is characterized in that the seeds of useful plants, in particular cotton and rice, simultaneously or in close proximity with a compound of formula I. Spreading in close proximity in the context of the invention is to be understood both as the soil application of a compound of the formula I into the seed furrow or on a very limited area around the seed, and also the sowing of seed pretreated with a compound of the formula I.

Seed dressing has proven to be a particularly suitable method for pretreating the seed. The active compounds of the formula I can be added in solid or liquid formulations in a pickling apparatus. In general, the dressing process is considered complete when the intended amount of active ingredient is evenly distributed over the seeds.

Depending on the type of dressing known per se (dry, wet, wet or mud dressing), 100 kg of seed is treated with 1 to 50 kg of a solid or liquid formulation which contains 5 to 75% of an active ingredient of the formula I. The customary solid or liquid formulations of the active compounds of the formula I can generally be used for seed treatment (dressing) and for seed furrow application.

Formulation examples: (% = weight percent)

Carboxymethyl cellulose 37% aqueous formaldehyde solution. Silicone oil in the form of a 75% aqueous emulsion of water

1% 0.2%

0.8% 32%

The finely ground active ingredient is intimately mixed with the additives. This gives a suspension concentrate from which suspensions of any desired concentration can be prepared by dilution with water.

15 c) granules a)

b)

Active ingredient of formula I kaolin

Fumed silica 20 attapulgite

5% 94% 1%

10%

90%

The active ingredient is dissolved in methylene chloride, sprayed onto the carrier and the solvent is then evaporated off in vacuo.

d) emulsion concentrate a)

b)

Active ingredient of formula I.

10%

10%

Nonylphenol polyethylene glycol

ether (5-45 mol AeO)

3%

-

Ca-dodecylbenzenesulfate

3%

-

Castor oil polyglycol ether

(36 mole AeO)

4%

-

Castor oil thioxilate

-

25%

Cyclohexanone

30%

15%

Butanol

-

Xylene mixture

50%

-

Ethyl acetate

-

50%

a) Spray powder

Active ingredient of formula I.

Na lignin sulfonate

Na lauryl sulfate

Na-Diisobutylnaphthalenesulfonat Nonylphenolpolyäthylenglykol-ether (7-35 mol AeO) Fumed silica bentonite

The active ingredient is mixed well with the additives and ground well in a suitable grinder. Spray powder is obtained which can be diluted with water to form suspensions of any desired concentration.

a)

b)

c)

20%

50%

75%

5%

5%

-

3%

-

5%

-

6%

10%

2%

_

5%

10%

10%

67%

27%

-

45

b) suspension concentrate

Active ingredient of formula I ethylene glycol

Nonylphenol polyethylene glycol ether (15 mol AeO)

Na lignin sulfonate

40% 10%

6% 10%

From this concentrate, any desired concentration can be adjusted by dilution with water.

Example 1:

In a glass bottle, 100 g of cotton seeds are pickled with 55% 10% emulsion concentrate of active ingredient A by rotating and shaking the bottle. The pickling amount per 100 g of cotton seeds is 2 g, respectively. 5 g of active ingredient A.

60 With 2% resp. 5% active ingredient A treated cotton seeds are sown in pots. 3 cotton plants in the 3 - 4 leaf stage grown from these seeds in the greenhouse at 25 - 30 C are seeded in a 20 l container with 20 freshly hatched Spodoptera littoralis larvae L-1. The container is then sealed with a cloth. 4 days after the infestation, the Spodoptera littoralis larvae residing on the cotton plants and living and dead individuals are evaluated.

660 110 4

Table 1

% Mortality of Spodoptera littoralis larvae on cotton plants which are grown from seeds which have been treated with active ingredient A.

Evaluation 4 days after the L-1 larvae of Spodoptera littoralis were applied to the cotton plants

Seed dressing living in% mortality stage damage to cotton plants with% larvae

Active ingredient A

2%

5%

control

5 2

20th

L-2 L-2 L-2

75 90 0

significantly reduced compared to control significantly reduced compared to control

Example 2:

100 g of rice seeds with a 10% emulsion concentrate of active ingredient A are pickled in a glass bottle by rotating and shaking the bottle. The pickling quantity is 2% active ingredient A per 100 g rice seeds.

Rice seeds treated with 2% active ingredient A are sown in pots. Two weeks after emergence, the plants are infected at weekly intervals with 20 Nym-20 phen from Nilaparvata lugens (N-3). 5-8 days after the infestation, the live and dead rice leafhoppers on the rice plants are evaluated.

Table 2

% Mortality of Nilaparvata lugens (N-3) on rice plants which are grown from seeds which have been treated with 2% active ingredient A.

Infestation after souffle

% Mortality evaluated 5 days after infestation (2 repetitions)

2 weeks

3 week

4th week

5th week

6th week

7th week control

60/70 60/70 50/40 100/90 80/90 100/80 0/0

45

50

55

60

65

Claims (2)

660110 PATENT CLAIMS 1. The use of 2,4,6-triamino-l, 3,5-triazines of the formula NH, I 2 Â N N I II H N- # «-NHR,, 2 \ / 1 N where Ri is cyclopropyl or isopropyl, for seed treatment or seed furrow application to protect the seed and the plant parts growing therefrom against phytopathogenic pests. 2. The use according to claim 1 of the compound of the formula / \ NN • I II / H-N- * »-NH- * 2 \ / \ N • for dressing tubers, onions and seeds of crops or for applying seed furrows to protect this seed and the parts of it growing from damage by insects and representatives of the Akarina order. 3. The use according to claim 2 of the compound of the formula A NN • I II / HN- * • -NH- * 2 \ / \ N • for dressing cotton and rice seeds to protect these seeds and the plant parts growing from them against damage by insects. 4. Use according to claim 1, characterized in that the seed in close proximity with a compound of the formula NH I 2 i \ N N I I! H N- * »-NHR, 2 \\ / 1 N brings out, wherein Rj means cyclopropyl or isopropyl. 5. Use according to claim 4, characterized in that the seed and a compound of the formula NH. I 2 i \ N N I II H "N-" "-NHR. , 2 \\ / 1 N where Ri is cyclopropyl or isopropyl, are applied in the same furrow.