冷季型草坪枯死规律及其病原的研究

1997～1998两年中从我校8个冷季型草坪上的调查研究结果表明，冷季型草坪成团枯死的主要病原有5种腐霉菌，4种镰刀菌和2种丝核菌。当年新播草坪大量枯死主要是腐霉菌引起的幼苗猝倒和茎叶腐烂所致。腐莓菌的为害同播种期密切相关，从3月上旬至6月上旬，病害为害程度随播种期的推迟而急剧加重，上年10月下旬以后至当年3月上旬之前播种可十分有效地减轻腐霉菌的为害。二、三年生草坪上以镰刀菌和丝核菌引起的枯草团为主。

Studies on the Pattern of the Dead Turf Areas and Their Pathogonic Species From Cool-Season Grasses

Investigation results show that five Pythium, four Fusarium and two Rhizoctonia are main pathogenic species from cool-season grasses in our college in 1997 and 1998. Pythium is main pathogeny by causing damping off and rot of stem and leaf in new seedlingr. There is a closer relation betwee harm of Pythium rapid increased as put off of sowing time, from the first ten-day period of March to the first ten -day period June. The harm can be markedly reduced by sowing in the last ten-day period of October to the prist ten-day period of March. Fusarium and Rhizoctnic are main pathogenic species in cool-season grasses which sowing of year before and last year.