Nematode extract and application thereof

Abstract

The invention belongs to the field of pesticides, and particularly relates to a nematode extract and application of an active compound of the nematode extract as a nematicide. The nematode extract is extracted by taking nematodes as raw materials, and the extract contains a series of compounds with nematicidal activity. One or more of the nematode extract, the active compound, the salt or the ester thereof can be mixed with agriculturally acceptable solvents and / or auxiliary materials to form a nematicidal preparation, and the nematicidal preparation is used as a nematicide for protecting plants against nematode infection or harm.

Description

technical field [0001] The invention belongs to the field of pesticides, and in particular relates to a nematode extract and its application as a nematocidal preparation. Background technique [0002] Nematodes, belonging to the phylum Nematodes, can be found everywhere in fresh water, sea water, and land. It is an animal group second only to insects in diversity. Currently, there are more than 28,000 recorded species, including 256 families and 2,271 genera. There are still a large number of species that have not yet been identified. name. In 1743, after the British scientist Needham first discovered the tritici nematode in diseased wheat grains, different reports of various types of nematodes appeared successively in various regions of the world. In 1993, Yeates and other scholars divided the nutritional groups of nematodes into 8 groups according to the feeding characteristics of nematodes, the structure of the esophagus, and the method of predation, among which plant-pa...

AI Technical Summary

Problems solved by technology

The active ingredients mainly include abamectin, thiazolphos, isofenphos-methyl, methamidophos, methyl bromide, aldicarb, amino-oligosaccharins, triamron, cartap, metamuc, carbofuran, and butylsulfone Carbofuran, etc. Most of the products are organophosphorus products, which are highly toxic. Most of the pesticides have a general inhibitory effect on pine xylophilus parasitic in woody plants such as Pinaceae. The fatality rate of wood nematode is less than 30%

Existing studies have shown that the ethanol extracts of Artemisia argyi, Gallopia vine, Sophora chinensis, Bovis chinensis, Herba Asarum and Adenophora aurantiae have strong poisonous activity against root-knot nematodes of bananas, and peppermint, neem, Polygonum water, pokeweed, Methanol extracts of Medicinal Plants such as Flyweed, Artemisia annua, Lianda and other medicinal plants have good poisonous activity against soybean cyst nematodes, but these extracts are only toxic and active against specific species of nematodes, and the components of active nematode active substances Its mechanism of action and practical application need to be further studied

[0010] At the same time, based on the classification, main form, reproductive mode, and most importantly Significant differences in the tolerance of pesticides or compounds can prove to a considerable extent that the same class of pesticides and / or compounds have incomparable anti-nematode effects on different nematodes

Hu Junjie (2017, East China University of Science and Technology) took the nematode-killing 5-HT3 receptor antagonist MDL-72222 as the lead, by changing the position of the aza double bridge chain, and introducing the pesticide active group thiadiazole or thiazolyl , designed and synthesized 61 unreported 3-azabicyclo[3.2.1]octane arylthiadiazole / thiazole compounds, and tested 42 of them against Meloidogyne incognita and B. xylophilus Activity experiment (nematode in vitro test), the result shows: have 6 kinds of compounds to have certain inhibitory activity to pine wood nematode in the tested compound; The compounds with inhibitory activity against pine xylophilus are different; that is, the antinematode activity of the same class or even the same compound against different nematodes is not comparable

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