Preventive and Therapeutic Effects of New Fungicides on Rice Blast

Jinqi Feng, Aiqing Feng, Xiaoyuan Zhu, Jianyuan Yang, Shen Chen and Jing Su

Asian Agricultural Research, 2023, vol. 15, issue 06

Abstract: [Objectives] The paper was to identify the characteristics and the potency of new fungicides to rice blast disease, and study their preventive and therapeutic effects on the disease. [Methods] Six new and conventional fungicides with different mechanisms of action were selected to compare their preventive and therapeutic effects on rice seedling blast in greenhouse. [Results] The agents which showed to be highly efficacious in blast prevention (greater than 90%) were 25% pyraclostrobin EC, 20% fenoxanil SC, 75% tricyclazole WP and 50% prochloraz-manganese WP sprayed at the dosages of 112.5-150, 180-360, 270-450 and 450-600 g/ha, respectively. The therapeutic effect of new fungicides 25% pyraclostrobin EC and 50% prochloraz-manganese WP on rice blast were above 90% when the dosages were 90-150 and 360-600 g/ha, respectively. The therapeutic effect of the conventional fungicide 40% isoprothiolane EC on rice blast was 69.04% when the dosage was 480 g/ha, while those of other fungicides were worse. [Conclusions] Both 25% pyraclostrobin EC and 50% prochloraz-manganese WP have good preventive and therapeutic effects on rice blast, which will provide a reference for the use of these fungicides in the field.

Keywords: Agribusiness (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:ags:asagre:341837

DOI: 10.22004/ag.econ.341837

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