Background
Nematodes belong to the class Nematoda of the linear phylum of invertebrates. Plant parasitic nematodes in plants and soils are characterized by small size, short life cycle, many species, extremely fast reproduction, wide distribution and difficult identification of damage symptoms. They are one of the main pathogens of plant invasive diseases. Compared with pathogens such as fungi, bacteria, and viruses, nematodes have the characteristics of actively tending and using needles to penetrate into the host, and transfer damage by themselves. The losses caused to crops are more difficult to estimate than other diseases. Nematodes are transmitted through soil or seeds, can infect and feed on parasitic plants, secrete biochemical toxins, transmit diseases caused by other microorganisms, affect the growth and development of crops, and cause plant yield reduction, quality decline, and even death.
Introduction of Nematicides
Historically, compounds such as carbon disulfide and formaldehyde have been used to control phytopathogenic nematodes, but the control effect is minimal. The use of agents to control nematodes is an effective method commonly used in modern agriculture, which can quickly or even completely control nematode communities in a short period of time. Therefore, when the nematicides are used, the crop yield is significantly increased.
Nematicides are a class of agents used to control plant pathogenic nematodes. The most important measures to control nematodes are chemical control, biological control, tillage and cultivation measures. Among them, the use of chemical nematicides and biological nematicides to control plant nematodes is the most simple and effective method.
Classification of Nematicides
1. Use
According to different uses, nematicides are divided into two categories. One type is obligate nematicides, that is, agents that are only active against nematodes at the concentration used, and are used to specifically control nematodes. Another group is facultative nematicides, ie agents that are active against most organisms at the concentrations used. These nematicides have a variety of uses.
2. Source
According to the source of raw materials, nematicides can be divided into chemical nematicides and biological nematicides. As an important class of nematicides, chemical nematicides have received extensive attention, and their research, development and application have played an important role in ensuring agricultural production. The variety of biological nematicides is still very limited, and the effect is not satisfactory.
(1) Biological Nematicides
Biological nematicides are a class of agents that use biologically derived preparations to control nematodes. Depending on the source, biological nematicides include bacterial-derived biological nematicides (such as Pasteurella), fungal-derived biological nematicides (such as Verticillium pachyphyllum, Paecilomyces lilacinus), plant-derived biological nematicides (eg matrine).
Nematicides and Metabolite Standards
Catalog No. BLP-000209
Name Dichlofenthion-[d3]
CAS 1293994-85-0