Effects of vesicular arbuscular mycorrhizae on growth and resistance to Rhizoctonia fragariae of strawberry
1995
Srisakaram, K. | Lumyong, S. (Chiang Mai Univ., Chiang Mai 50200 (Thailand). Dept. of Biology)
This study was designed to evaluate the effect of vesicular-arbuscular mycorrhizae (VAM) on growth, yield and resistance to Rhizoctonia fragariae of strawberry. The experiment was conducted from November 1991 to April 1992. The strawberries were planted in pots to determine growth rate, yield and yield component. The experiment used a split plot design with 5 replications for each of the following inoculations: Acaulospora sp., Glomus sp., a mixture of Acaulospora sp. and Glomus sp. and non VAM. With each inoculation, the main plot consisted of two subplots. Results indicated that VAM plants performed better with regard to growth rate, dry weight of total biomass (stems, leaves, petioless and roots), leaf area and leaf area index. They were significantly higher than non-VAM plants (p0.05), whether R. fragariae was present or not. Average fruit dry weight with the mixed VAM inoculum, even with R. fragariae infection, was significantly higher than other inoculation types. In the absence of R. fragariae, Acaulospora sp. showed the highest rate of infection. In the presence of R. fragariae, the mixed inoculation of VAM showed the highest infection. Whether R. fragariae was present or not, VAM plants were significantly more vigorous than non-VAM plants. It was also found that VAM decreased the pathogenecity of R. fragariae. Results of the study showed that VAM can enhance growth, yield and resistance of R. fragariae in strawberries
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