关键词: 花棒锈病, 重寄生菌, 抑病作用, 以菌哺林

Abstract: Hedysarum scoparium Fisch.et Mey. is an excellent pioneer tree species for sandfixation. Uromyces onobrychidis (Desm.)L v. is one of the common disease on H.scoparium and in some areas it restrict the sandfixation effect of H.scoparium seriously. This paper reported the source of hyperparasite strains, effect of temperature and carbon sources on mycelia growth and sporogensis, inoculation experiment in laboratory and the natural inhibition of hyperparasitism on H.scoparium It was found out that the hyperparasite parasitized on the uredinia and telia of the rust of H. scoparium. When they were parasitized by hyperparasite, the color of uredinia changed from orange yellow to white and that of telia changed from chocolate-brown to pale-brown. At later stage, the uredinia lost their germinating ability, and hyperparasite conidia only occurred at uredinia base. The hyperparasite grew well on PDA and in the temperature of 20~25℃.It was a natural hyperparasitism, the hyperparasite was identified as Sphaerellopsis sp., it has strong inhibitory effect on rust of H.scoparium. If we use the bio-chain sufficiently and artificially interfere the occurrence of this phenomenon early and more, it can improve the sandfixation ability of H.scoparium effectively, its latent meaning is great and it is also a new resource to control tree diseases and to foster forest with fungi.

Key words: Uromyces onobrychidis, hyperparasite, inhibitory effect, foster forest with fungi