山东小麦叶锈病发生规律与防治研究

叶锈菌可在自生麦苗越夏,并成为侵染秋苗的主要菌源,以秋苗潜育菌丝为主要越冬方式.春季发病重与越冬菌量大、最低温月温度较常年高、4月份气温回升早以及4～5月份雨量和雨露日多有关.通过1057份小麦品种抗性鉴定,鲁麦1、2、3、5、7、8号等品种综合抗性和丰产性均较好.适期晚播或用20%粉锈宁乳油亩用量50～100毫升防治有效.

A STUDY ON OCCURRENCE AND CONTROL OF WHEAT LEAF RUST(pUCCINIA TRITICINA ERIKS)

Wheat leaf rust ( Puccinia triticinia Eriks ) might oversummer on volunteer wheat seeding and then becomes the main pathogen infecting the wheat crop in autumn. The fungi overwinter mainly by the insidious mycelia in autumn wheat. Heavier infection by the fungus in spring is correlated to combination of larger population of the overwintering pathogen, higher temperature in Junuary,earlier warm up and more rainfall and dew days in April and May. Resistant appraisal of 1057 samples of wheat varieties suggested that "Lumei" No. 1, 2, 3, 5, 7, 8 are excellent varieties with good resistance and high-yield at present. The disease can be controlled by once spraying Triadimefon 20% at 50—100ml per mu, and by sowing properly later.