Effect of Exogenous Silicon Application and Irrigation Methods on Powdery Mildew of Poa pratensis

doi:10.11924/j.issn.1000-6850.2013-3139

Abstract

Abstract: In order to explore the controlling of powdery mildew disease on Poa pratensis from the silicon application and irrigation point of view, this indoor potted experiment was carried out to study the effect of application of silicon and root irrigation on powdery mildew disease of Poa pratensis. The results showed that root irrigation had insignificant as well as differential inhibitory effect on powdery mildew disease of Poa pratensis, and increased disease for those in grave conditions (for the gramineous grass while the disease was serious, root irrigation would aggravate the disease severity). The external application of SiO2 could significantly decrease the disease index and the disease severity(P＜0.05). With the increase of the silicon materials input, the disease severity decreased within the concentration of silicon (0, 31, 92, 275 mg/m2) set up in experiment. Key words: Poa pratensis; soluble silicon; root irrigation; powdery mildew; disease index.

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