Application of fusaric acid to inhibition of ustilaginoidea virens

Abstract

The invention provides application of fusaric acid to inhibition of ustilaginoidea virens. A situation that fusaric acid is capable of effectively inhibiting mycelial growth and spore germination of the ustilaginoidea virens is found through a mycelial growth rate method and a spore germination bacterial colony inhibition method. A situation that the fusaric acid has a better control effect to ustilaginoidea virens is found through a field trial result. Dosages of effective constituents are 200mg / L, 300mg / L and 400mg / L, and average control effects of the effective constituents to the ustilaginoidea virens can respectively reach 48.40 percent, 54.92 percent and 63.08 percent. The first research of the application finds that the fusaric acid has strong inhibition function and good control effect to the ustilaginoidea virens, and provides a new scientific thought for further developing and researching and creating a novel agricultural bactericide and applying to the control of the ustilaginoidea virens.

Description

technical field [0001] The invention relates to the field of plant disease prevention and control, in particular to the application of fusaric acid in inhibiting rice smut bacteria. Background technique [0002] Rice false smut is caused by Chlorosclerotinum oryzae ( Ustilaginoidea virens (Cooke) Tak) fungal disease of panicles of rice. Because the disease occurs more frequently in the years when rice grows well, it is called "Valley of Harvest Years". The disease occurs in the rice producing areas of the world. Before the 1980s, the disease occurred sporadically and was a secondary disease. After 2000, with the popularization of hybrid rice varieties with dense panicle type, the improvement of fertilization level and the change of climatic conditions, rice false smut has risen from the original secondary disease to the main disease in rice areas. The disease mainly occurs at the heading stage of rice. The rice curve ball produced by the pathogen not only causes a signif...

AI Technical Summary

Problems solved by technology

However, in recent years, due to the single use of Jinggangmycin on a large scale all year round, it has been reported that rice smut bacteria are resistant to Jinggangmycin

In 2011, Xiao Youhua found that the relative control effect of 20% Jinggangmycin water-soluble powder on diseased ears was only 40% (test of rice false smut pesticide control, Zunyi Science and Technology, 2011, 2:7-9); and Zhang Min also reported that Jinggang Mymycin has very poor control effect on rice false smut (Causes of large-scale occurrence of rice false smut in Nanchong City and countermeasures, Sichuan Agricultural Science and Technology, 2011, 3: 46-47)

At present, there are commercial products using Fusarium metabolites (biotin) to make fusaric acid in China, but there are no reports on the use of Fusarium metabolites (biotin) to inhibit and control rice smut

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