Study on the control of toxin contamination from Fusarium head blight

doi:10.16178/j.issn.0528-9017.20240099

Abstract

Abstract:

Fusarium head blight (FHB) not only directly reduces wheat yield but also contaminates wheat grains with toxin produced by its pathogens, posing significant food safety risks. Therefore, improving FHB management and advancing toxin mitigation technologies are critical. This study evaluated the efficacy of mainstream FHB control agents in both disease suppression and toxin reduction. Two-year trials demonstrated that spraying 40% prothioconazole·tebuconazole suspension concentrate (600 mL·hm^-2) or a combination of 200 g·L^-1 pydiflumetofen suspension concentrate (900 mL·hm^-2) and 250 g·L^-1 propiconazole emulsifiable concentrate (600 mL·hm^-2) at the early flowering stage achieved over 77.0% control efficacy against FHB. These treatments restricted deoxynivalenol (DON) and zearalenone (ZEN) levels below 700 μg·kg^-1 and 200 μg·kg^-1, respectively. A second application 7 days after the initial treatment did not significantly enhance control efficacy but further reduced toxin levels in epidemic years. Additionally, pre-harvest spraying of 25% phenamacril suspension concentrate (1 500 mL·hm^-2) further decreased Fusarium toxin content in grains, though effectiveness varied between years, with more pronounced reductions during FHB epidemics. These findings provide practical insights for managing Fusarium toxins in wheat.

Key words: Fusarium head blight, chemical agents, control efficacy, toxins

CLC Number:

S435.121.4+5

SHOU Linfei, LI Chunyuan, ZHU Jianzhen, QIU Haiping, CHAI Rongyao, ZHANG Zhen. Study on the control of toxin contamination from Fusarium head blight[J]. Journal of Zhejiang Agricultural Sciences, 2025, 66(8): 1938-1943.

Figures/Tables 6

References 22

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处理	药剂、剂量及次数	减毒用药与剂量
22T1	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,2次	清水
22T2	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,2次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
22T3	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2 + 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,2次	清水
22T4	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2 + 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,2次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
22T5	48%氰烯·戊唑醇悬浮剂750 mL·hm^-2,2次	清水
22T6	48%氰烯·戊唑醇悬浮剂750 mL·hm^-2,2次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
22CK	清水	清水

处理	药剂、剂量及次数	减毒用药与剂量
22T1	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,2次	清水
22T2	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,2次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
22T3	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2 + 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,2次	清水
22T4	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2 + 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,2次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
22T5	48%氰烯·戊唑醇悬浮剂750 mL·hm^-2,2次	清水
22T6	48%氰烯·戊唑醇悬浮剂750 mL·hm^-2,2次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
22CK	清水	清水

处理	药剂、剂量及次数	减毒用药与剂量
23T1	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,1次	清水
23T2	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,1次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
23T3	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2+ 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,1次	清水
23T4	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2+ 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,1次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
23T5	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,2次	清水
23T6	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,2次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
23T7	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2+ 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,2次	清水
23T8	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2+ 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,2次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
23CK	清水	清水

处理	药剂、剂量及次数	减毒用药与剂量
23T1	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,1次	清水
23T2	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,1次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
23T3	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2+ 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,1次	清水
23T4	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2+ 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,1次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
23T5	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,2次	清水
23T6	40%丙硫菌唑·戊唑醇悬浮剂600 mL·hm^-2,2次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
23T7	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2+ 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,2次	清水
23T8	200 g·L^-1氟唑菌酰羟胺悬浮剂900 mL·hm^-2+ 250 g·L^-1丙环唑乳油600 mL·hm^-2组合,2次	25%氰烯菌酯悬浮剂1 500 mL·hm^-2
23CK	清水	清水

处理	病情指数	防治效果/%
22T1	1.40±0.39	83.3±4.62 a
22T3	1.38±0.24	83.5±2.85 a
22T5	2.79±0.57	66.8±6.83 b
22CK	8.40±1.30	0