A drug for preventing and controlling rice blast fungus

Abstract

The invention discloses a medicine for preventing and controlling rice blast fungus. The research of the present invention finds that tangeretin can interfere with the formation of appresses of conidia, has a significant delay effect on the formation of appresses of rice blast fungus, has obvious inhibitory effect on rice blast, and inhibits the pathogenicity of rice blast fungi. It has good application value in the prevention and control of plague and drug development.

Description

technical field [0001] The invention relates to the field of plant disease prevention and control, more specifically, to a medicine for preventing and controlling blast fungus. Background technique [0002] Rice is one of the three major grains in the world and is a very important food crop. Rice blast is a rice disease caused by Magnaporthe oryzae. It is the first of the three major diseases of rice. It occurs in all rice-growing regions in the world. It has caused large-scale losses in production and has become a major threat to food security. Moreover, rice blast often recurs and is extremely difficult to control. [0003] The current main control strategies for rice blast include breeding of resistant varieties, application of chemical pesticides and biocontrol bacteria to prevent and control rice blast fungus (Sun Shuyuan et al., 1986; Law et al., 2017; Xing et al., 2017; Zhu et al. al., 2016). However, these strategies have their own limitations: the planting of a s...

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Problems solved by technology

However, these strategies have their own limitations: the planting of a single disease-resistant variety in a large area in successive years leads to the loss of resistance of the variety; the application of pesticides is effective in disease control, but it is easy to pollute the environment, cause pesticide residues, and cause adverse consequences such as pathogenic bacteria resistance. ;Biological control is a very effective measure to prevent and control rice blast, but it is time-consuming and labor-intensive to find and develop bio-control bacteria, and the efficacy of bio-control bacteria is prone to instability

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