Paecilomyces lilacinus and application thereof

Abstract

A (P.lilacinus)YES-2 CGMCC No. 2012, its bacterial agent and use are disclosed. The process is carried out by taking polymer sodium alginate as base skeleton, taking (P.lilacinus)YES-2 CGMCC No. 2012 mycelium and spore mixture as active ingredients, taking diatomite as carrier, forming sodium alginate and polyvalent positive ion into gel and sodium alginate-calcium chloride reacting to obtain final product. The prevention rate reaches to 50-60%. It's stable, cheap and convenient. It has no chemical residual and pollution for agricultural product and environment. It can be used to prevent plant root nematode.

Description

technical field [0001] The invention relates to a strain of Paecilomyces lilacinus and its application, in particular to a strain of Paecilomyces lilacinus and its agent and the application of the agent in preventing and treating plant root-knot nematode diseases. Background technique [0002] Among the four major pathogens that cause plant infectious diseases, plant parasitic nematodes are more harmful than bacteria and viruses, and are second only to fungal diseases. Plant parasitic nematodes cause about 100 billion US dollars of losses in world agricultural production every year, among which root-knot nematodes (Meloidogyne spp.) are the most harmful type of plant parasitic nematodes, and the economic losses caused by the world's important economic crops are as high as tens of millions of dollars each year. tens of billions of dollars. Within the genus Meloidogyne, M. incognita, M. arenaria, M. javanica and M. hapla The root-knot nematodes of the four species are the mo...

AI Technical Summary

Problems solved by technology

[0005] 1. Most of the existing biocontrol agents for the prevention and treatment of plant nematode diseases are spore preparations, which have high requirements for the production of upstream active ingredients, and often require two-step fermentation (liquid fermentation combined with solid fermentation) to obtain the active ingredient, fungal spores, and the preparation process is very cumbersome

[0006] 2. The level of dosage form is low. At present, most of the biocontrol agents for nematode control are powders, suspension concentrates, etc., with extensive technology and poor soil applicability, which is not conducive to soil environment application, and it is often difficult to overcome the unfavorable environmental factors that inhibit germination in soil. Form a colony, and these preparations mostly appear in the form of seed coating or seed dressing, and the amount of bacteria carried is very limited

Therefore, the lack of market competitiveness limits its application

[0007] 3. The stability is poor, and the activity of the bacterial agent loses very quickly, resulting in a short shelf life of biocontrol agents, making it difficult to produce commercially

In order to ensure that the preparation has a long shelf life, strict storage conditions are often required, which directly limits the large-scale application of fungal biopesticides

[0008] To sum up, although the biological control pesticides for plant nematode diseases in the soil have a very broad market space, some strains with certain biocontrol potential have been obtained through the research on the biological control of plant parasitic nematodes for a long time, but their industrial application is still limited. The progress is slow, and there is a lack of preparations that can meet the needs of nematode biocontrol in actual production

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