Methylthio-diafenthiuron pesticide and application thereof

Abstract

The invention provides a methylthio-diafenthiuron pesticide having a chemical structure shown below and application of methylthio-diafenthiuron as an active ingredient in the preparation of agricultural pesticides. The methylthio-diafenthiuron pesticide is effective in preventing and controlling Lepidoptera and Homoptera pests. The methylthio-diafenthiuron pesticide has the advantages that pesticidal spectrum and bactericidal spectrum are wide, pest-killing and bactericidal times are short, the effect is lasting, a synthetic process is simple, the cost is low, and compounding effect is good.

Description

technical field

[0001] The invention relates to the technical field of agriculture, in particular to a thiobutazone insecticide and its application. Background technique

[0002] Crop diseases and insect pests are one of the main agricultural disasters in our country. It has the characteristics of various types, great impact, and frequent outbreaks. The scope and severity of its occurrence and severity often cause heavy losses to our national economy, especially agricultural production. Common crops in my country are the following types of pests and diseases: rice planthopper, powdery mildew, corn borer, cotton bollworm, wheat rust, cotton aphid, rice sheath blight, rice blast, wheat aphid, wheat red spider, locust, wheat gibberella Diseases, etc. have become major pests and diseases that have seriously affected my country's agricultural production. Due to the long-term use of chemical pesticides for prevention and control, pests have produced varying degrees of resistance to...

Examples

Embodiment 1

[0036] A difenthiuron insecticide and its application, the preparation process is as follows:

[0037] Using 2,6-diisopropylaniline as a raw material, it reacts with bromine to generate 4-bromo-2,6-diisopropylaniline, and then reacts with phenol at 150°C under the catalysis of 8-hydroxyquinoline copper for a long time About 23 hours to get 2,6-diisopropyl-4-phenoxyaniline, 2,6-diisopropyl-4-phenoxyaniline is condensed with NaSCN under hydrochloric acid to generate substituted thiourea at 150 Thermally decompose at ℃ to obtain isothiocyanate, and finally react with tert-butylamine and methylating reagent to obtain the target product, namely 1-tert-butyl-3-(2,6-diisopropyl-4-phenoxyphenyl )-2-methylisothiourea.

[0038] Indoor activity determination of difenthiuron (content 98%):

[0039] 1. Test drug: Take 98% of the original drug of thiobutazone, 95% of chlorantraniliprole TC, 95% of buprofezin TC, and 95.60% of pyridaben TC.

[0040] 2. Insect test targets: indoor reared m...

Embodiment 2

[0050] A difenthiuron insecticide and its application, the preparation process is as follows:

[0051] Using 2,6-diisopropylaniline as a raw material, it reacts with bromine to generate 4-bromo-2,6-diisopropylaniline, and then reacts with phenol at 150°C under the catalysis of 8-hydroxyquinoline copper for a long time About 23 hours to get 2,6-diisopropyl-4-phenoxyaniline, 2,6-diisopropyl-4-phenoxyaniline is condensed with NaSCN under hydrochloric acid to generate substituted thiourea at 150 Thermally decompose at ℃ to obtain isothiocyanate, and finally react with tert-butylamine and methylating reagent to obtain the target product, namely 1-tert-butyl-3-(2,6-diisopropyl-4-phenoxyphenyl )-2-methylisothiourea.

[0052] Determination of EC activity of 20% difenthiuron:

[0053]1. Test agent: 20% diafenthiuron EC, 25% diafenthiuron EC (kaka), 2.5% imidacloprid DMF solution, 95.60% pyridaben TC.

[0054] 2. Insect test targets: 3rd instar mid-instar larvae of diamondback moth P...

technical field

[0001] The invention relates to the technical field of agriculture, in particular to a thiobutazone insecticide and its application. Background technique

[0002] Crop diseases and insect pests are one of the main agricultural disasters in our country. It has the characteristics of various types, great impact, and frequent outbreaks. The scope and severity of its occurrence and severity often cause heavy losses to our national economy, especially agricultural production. Common crops in my country are the following types of pests and diseases: rice planthopper, powdery mildew, corn borer, cotton bollworm, wheat rust, cotton aphid, rice sheath blight, rice blast, wheat aphid, wheat red spider, locust, wheat gibberella Diseases, etc. have become major pests and diseases that have seriously affected my country's agricultural production. Due to the long-term use of chemical pesticides for prevention and control, pests have produced varying degrees of resistance to...

Examples

Embodiment 1

[0036] A difenthiuron insecticide and its application, the preparation process is as follows:

[0037] Using 2,6-diisopropylaniline as a raw material, it reacts with bromine to generate 4-bromo-2,6-diisopropylaniline, and then reacts with phenol at 150°C under the catalysis of 8-hydroxyquinoline copper for a long time About 23 hours to get 2,6-diisopropyl-4-phenoxyaniline, 2,6-diisopropyl-4-phenoxyaniline is condensed with NaSCN under hydrochloric acid to generate substituted thiourea at 150 Thermally decompose at ℃ to obtain isothiocyanate, and finally react with tert-butylamine and methylating reagent to obtain the target product, namely 1-tert-butyl-3-(2,6-diisopropyl-4-phenoxyphenyl )-2-methylisothiourea.

[0038] Indoor activity determination of difenthiuron (content 98%):

[0039] 1. Test drug: Take 98% of the original drug of thiobutazone, 95% of chlorantraniliprole TC, 95% of buprofezin TC, and 95.60% of pyridaben TC.

[0040] 2. Insect test targets: indoor reared m...

Embodiment 2

[0050] A difenthiuron insecticide and its application, the preparation process is as follows:

[0051] Using 2,6-diisopropylaniline as a raw material, it reacts with bromine to generate 4-bromo-2,6-diisopropylaniline, and then reacts with phenol at 150°C under the catalysis of 8-hydroxyquinoline copper for a long time About 23 hours to get 2,6-diisopropyl-4-phenoxyaniline, 2,6-diisopropyl-4-phenoxyaniline is condensed with NaSCN under hydrochloric acid to generate substituted thiourea at 150 Thermally decompose at ℃ to obtain isothiocyanate, and finally react with tert-butylamine and methylating reagent to obtain the target product, namely 1-tert-butyl-3-(2,6-diisopropyl-4-phenoxyphenyl )-2-methylisothiourea.

[0052] Determination of EC activity of 20% difenthiuron:

[0053]1. Test agent: 20% diafenthiuron EC, 25% diafenthiuron EC (kaka), 2.5% imidacloprid DMF solution, 95.60% pyridaben TC.

[0054] 2. Insect test targets: 3rd instar mid-instar larvae of diamondback moth P...

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