SU680615A3 - Insecticide - Google Patents

Description

(54)

INSECTICIDE

one

This invention relates to chemical plant protection products, specifically to the use of derivatives of substituted coumarin as an insecticide.

The use of 3- (alkoxyphenylcarbamoyl) -4-hydroxycoumarin as a pesticide is known l. However, the insecticidal properties of these compounds are insufficient at low dosage rates.

The purpose of the invention is to expand the range of active insecticides based on coumarin derivatives.

This goal is achieved by using derivatives of the substituted coumarin of the formula

R is phenyl unsubstituted or substituted once, twice with halogen, halogen, 4-cytrophenyl, 3-trifs methylphenyl.

It is also known the use of compounds of the formula I as a bactericide 23.

The method of obtaining derivatives of substituted coumarin is based on the interaction of adjacent zshir of the formula

OH S-1

P

0

with appropriately substituted aniline at 100–200 ° C under normal or elevated pressure in an inert solvent, as well as on the interaction of 4-hydroxycoumarin with isocyanate or azidani at normal or elevated pressure in an inert solvent,

Compounds of the formula

Ri

Co-NH

Sh

The table shows compounds of formula 1 with various radicals.

The proposed compounds are converted by conventional methods, common in the manufacture of preparative Forms, into ready-to-use forms. Forms of application are common: solutions, dispersions, dusts, granules, etc.

Example 1. Efficacy against Leptinotarsa deceralineata.

For a potato bush 15 cm high, 25 ml of a 1: 1 mixture of acetone and water containing 0.1; 0.5 and 0.01% of the test compound

After drying, 10 larvae of the species Leptinotarsa decemlineata (stage L.) were settled on each bush of potatoes. Then, in order to prevent possible resettlement of X1 larvae, each plant was covered with a plastic cylinder, covered with a copper lid that permits gases, iepes for 2 days to determine damage from damage.

Results were assessed by a five-year system.

100% damage at 0.1 wt.% Active substance 1 point

Traces of damage at 0.1 wt.% Active substance 2 points.

Traces of damage at 0.05% by weight of active substance 3 points.

Traces of damage at 0.01 wt.% Active substance .5 points

Connection 1 2 3 4 6 8 10 12 13 A

Rating: 2535552551

3- {4-methoxyphenylcarbamoyl) -4-hydroxycoumarin (compound A) was used for comparison.

Example 2. Efficacy against Spodoptera littoralis.

5 Two cotton with a height of 15 cm were sprayed with 25 ml of a 1: 1 solution of acetone and water containing 0.1; 0.05% and 0.01% of the test compound.

0 After drying, the plant was inhabited by 5 Spodoptero littoralis larvae (stage Lj). Each plant was covered with a plastic cylinder covered with copper.

5 cap, permeable gases. Through

2 days determined to die from obedan

The results are shown below.

Connection 123456789 0 10 11 12 13 A

Evaluation; 353555353355 551

Example 3. Efficacy against Iiucillia serikata.

To 2 ml of the nutrient medium was added 2 ml of an aqueous solution containing 0.1% TecT-BettiecTBa .. Then to the nutrient medium. about 30 newly hatched Lucillia serikata larvae were germinated and insecticidal efficacy was examined after 96 h by determining the degree of mortality.