黑麦草冠锈病的发生发展规律和防治技术研究

黑麦草冠锈病是西安市禾草草坪上的重要病害,主要危害多花黑麦草,也危害早熟禾和剪股颖。3月上旬禾草返青后即开始发病,6～10月为发病最严重的时期,12月中旬以后越冬。机械剪草和喷灌是造成该病严重发生和流行的重要因素。通过试验,采用农业防治(减少剪草次数和喷灌次数)和化学防治(喷百理通、三唑酮、腈菌唑等农药)等项技术措施,可有效地控制该病的蔓延和危害。以上技术措施已在36hm2禾草草坪上连续应用两年,防病效果显著。

Studies on the Regularity of Occurrence and Development of Ryegrass Crown Rust(Puccinia coronata Corda) and Its Control Techniques

Ryegrass crown rust,caused by Puccinia coronata Corda,is animportant disease on the grminaceous lawn in Xi''an city.It mainly damages Lolium multiflorum Lam.,it also damages Poaannua L.and Agrostis mut sumurae Hack.It begins to infect the lawn in the first ten days of March when the graminaceous grass turns to green.From June to October is the mostserious period of disease development.After the second ten days of December,it begins to over winter.Mechanical mowing and sprinkling irrigation are the main factors inducing the serious disease occur rence and epidemic.Through experiment,we found that cultural practices(reduce the mechanical mowing and sprinkling irrigation times)and chemical control(spray fungicides,such as Bayleton,Triadimefon,Myclobutanil et al)can effectively control its development and damage.Those techniques were utilized on 36 hm² gram inaceous lawn in the continuous two years,and the effect is significant.