A new glycoside agricultural insecticidal compound

A compound and the technology of willow willow, applied in the field of pesticides, can solve the problems of excessive pesticide residues and food safety threats, and achieve the effect of large yield, low pressure and wide distribution of plants

Inactive Publication Date: 2015-09-30
PESTICIDE INST XIBEI AGRI & FORESTRY TECHUNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long-term and high-frequency application of pesticides, the pests have developed resistance or resistance to the above-mentioned pesticides to varying degrees. To achieve the ideal control effect, the only way to continuously increase the dosage of pesticides is to cause the pesticide residues in agricultural products to exceed the standard, which poses a threat to food safety. serious threat
The present invention provides a plant-derived steroidal glycoside compound, which has the advantages of novel structure and unique mechanism of action. At the same time, there is no compound of this type of structure in the current commercial insecticides

Method used

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  • A new glycoside agricultural insecticidal compound
  • A new glycoside agricultural insecticidal compound
  • A new glycoside agricultural insecticidal compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] compound separation

[0011] Put 500g of the plant root bark and crushed plant sample in a 5L round bottom flask, add 3000mL methanol for reflux extraction for 3 hours, filter the supernatant, then add 3000mL methanol for reflux extraction for 2 hours, filter the supernatant liquid, the combined filtrates were concentrated under reduced pressure to about 100 mL. The concentrate was suspended in 400 mL of water, and then extracted three times with 500 mL of n-butanol, the butanol phases were combined, and concentrated to near dryness under reduced pressure. After the concentrate 60.0g chloroform was dissolved, the sample was mixed with silica gel, transferred to a silica gel column (4.0×100cm), and eluted with sherwood oil / acetone=9 / 1, 8 / 2, 7 / 3 (volume ratio) successively. Rinse 1000mL with each solvent ratio, collect one portion per 100mL, concentrate 6 / 4 of the eluent to dryness, transfer it to a silica gel column (3.0×50cm), and use petroleum ether / acetone=7 / 3, 6 / 4 (...

Embodiment 2

[0013] Preparation of 0.2% Glycoside Emulsion in Water

[0014] Weigh 20.0g of the crude extract containing the compound involved in the present invention (containing the compound ≥ 0.20g involved in the present invention) and dissolve it in 35g xylene, then add non-ionic surfactant Nongru 4005.0g, TX-55.0g, 35g of water, stirred until emulsified, to obtain the water emulsion in which the compound is an active ingredient, wherein the active ingredient content is 0.2%.

Embodiment 3

[0016] Preparation of 0.1% Glycoside microemulsion

[0017] Take by weighing the crude extract 10.0g (compound ≥ 0.10g involved in the present invention) that contains the compound involved in the present invention and be dissolved in 20g methanol, then add anionic surfactant calcium dodecylbenzenesulfonate (DBS-Ca ) 3.0g, 337.0g non-ionic surfactant Ning milk, 60g water, stirred to a transparent homogeneous phase, to obtain the compound as the microemulsion of the active ingredient, wherein the active ingredient content is 0.10%.

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Abstract

The invention provides a periploca sepium bunge neo-glycoside compound with agricultural insecticidal activity, belonging to the technical field of pesticides. The compound provided by the invention has the structural formula shown in the specifications, and the IUPAC (International Union of Pure and Applied Chemistry) chemical name thereof is delta<5>-pregnene-3beta,17alpha-dyhydroxyl-,20(S)-oxy-(2-O-acetyl-beta-D-digitalose(1->4)-beta-D-cymarose-(1->4)-beta-D-cymarose-(1->4)-beta-D-cymarose-(1->4)-((1->5)-3,7-dideoxy-4-O-methyl-alpha-D-glucose-2-ketoheptose(2,4)-dyhydroxyl-(1->3)-beta-D-cymarose). The compound provided by the invention has strong stomach toxicity insecticidal activity selectively on cabbage worm, plutella xylostella and beet armyworm, and can be processed into an agricultural insecticidal preparation.

Description

Technical field: [0001] The invention relates to the technical field of pesticides, in particular to the use of a new compound of bark willow new glycosides for preventing and treating cabbage caterpillar, diamondback moth and beet armyworm. technical background: [0002] Lepidoptera insects such as cabbage caterpillar, diamondback moth, and beet armyworm are important pests that threaten the production of cruciferous vegetables such as cabbage and cabbage. Generally, there are 3-4 generations a year, and even more than 10 generations in the southern region, resulting in a 20% reduction in production. % - 30%, severe production reduction can reach more than 60%. The main technical method currently used to control such pests is still chemical control, mainly insecticides such as beta-cyhalothrin, beta-cypermethrin, abamectin, and emamectin. Due to the long-term and high-frequency application of pesticides, the pests have developed resistance or resistance to the above-mentio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07J7/00A01N45/00A01P7/04
Inventor 师宝君白建军吴文君魏少鹏姬志勤胡兆农
Owner PESTICIDE INST XIBEI AGRI & FORESTRY TECHUNIV
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