[关键词]
[摘要]
以禾谷镰孢菌为研究对象,在室内测定不同浓度可溶性硅和不同杀菌剂及其互配对禾谷镰孢菌生长的影响。结果表明,可溶性硅浓度越大,对禾谷镰孢菌的抑制率越高,1 666.7 mg/L硅处理后对禾谷镰孢菌的抑制率达30.3%。40%咯菌腈·氟唑菌酰羟胺(0.008 mg/L)对禾谷镰孢菌的毒力最强(EC50=0.008 mg/L),可溶性硅与40%咯菌腈·氟唑菌酰羟胺混配可明显降低对禾谷镰孢菌的抑制率,降幅为8.7%~12.87%;可溶性硅与5%香芹酚按不同比例混配对禾谷镰孢菌互作效应不同;可溶性硅与其他四种杀菌剂混配都能促进对禾谷镰孢菌的抑制。田间药效试验表明,除40%咯菌腈·氟唑菌酰羟胺外,其他5种杀菌剂与硅肥混合喷施防效和产量都高于单喷,其中,混合喷施2 000 mg/L可溶性硅肥+25%吡唑醚菌酯防效最好,增产最高。
[Key word]
[Abstract]
Fusarium graminearum was taken as the research object, and the effects of different concentrations of soluble silicon, different fungicides and interaction of fungicides on the growth of F.graminearum were determined in the laboratory. The results showed that the inhibition rates of 1 666.7 mg/L silicon to F.graminearum were 30.3% the higher concentration of soluble silicon, the higher the inhibition rate to F.graminearu. 40% Fludioxonil· fluconazole hydroxylamineon had the highest toxicity to F.graminearum(EC50=0.008 mg/L), 40%Fludioxonil·fluconazole hydroxylamineon the pathogen of Corn stalk rot was obviously reduced by 8.7%-12.87%. The effect of the mixture of soluble silicon and carvacrol on the interaction of F.graminearum was different, the other fungicides could promote the inhibition of F.graminearum among them. The results of field efficacy test showed that, in addition to 40% Fludioxonil·fluconazole hydroxylamineon, the other 5 fungicides and silicon fertilizer combined spraying had higher control effect and yield than single spraying, among which 2 000 mg/L soluble silicon fertilizer plus 25% Pyraclostrobi had the best control effect and the highest yield increase.
[中图分类号]
S435.131
[基金项目]
甘肃省重点研发计划(18YF1NA011)、甘肃省玉米产业技术体系(GARS-02-03)、甘肃省青年科技基金计划(20R10RA482)、甘肃省定西市科技计划(DX2021AR09)项目、甘肃省陇原青年人才创新个人项目(甘组通字〔2021〕17号)