INOCULUM PRESSURE AND THE DEVELOPMENT OF STEM RUST EPIDEMICS IN BARLEY
INOCULUM PRESSURE AND THE DEVELOPMENT OF STEM RUST EPIDEMICS IN BARLEY
复制标题
DOI：
10.1071/ar9910769
复制
发表时间：
1991-01-01
影响因子：
--
通讯作者：
PLATZ, GJ
中科院分区：
文献类型：
--
作者：
DILLMACKY, R;REES, RG;PLATZ, GJ
通过田间试验研究了接种压力对两个不同抗性大麦品种上小麦条锈菌流行的影响。 通过在地块内接种病灶和/或战略性使用杀真菌剂来确定处理。 保持额外的“无锈”处理，以提供谷物产量和品质的比较。 锈病的严重程度，锈病发病率和粮食产量和quality之间的关系也examined.Initial接种水平是重要的，在确定疾病的严重程度和发病率为个人流行病，然而，严重的流行病发展下最“生锈”的易感品种帆船治疗和粮食产量下降高达58%。 中抗品种Grimmett在相应处理下的流行较轻，抗性价值明显，产量损失不超过12%。 产量降低通常与晶粒尺寸和重量降低有关。
The effects of inoculum pressure on the development of epidemics of Puccinia graminis tritici in two barley cultivars with different levels of resistance were examined in two field experiments. Treatments were established by inoculation of foci within plots and/or the strategic use of fungicides. Additional 'rust-free' treatments were maintained to provide comparisons of grain yield and quality. Relationships between rust severity, rust incidence and grain yield and quality were also examined.Initial inoculum levels were important in determining disease severity and incidence for individual epidemics; however, severe epidemics developed under most 'rusted' treatments of the susceptible cultivar Galleon and reduced grain yield by up to 58%. Epidemics under corresponding treatments of the moderately resistant cultivar Grimmett were less severe, and the value of the resistance was evident with yield losses not exceeding 12%. Yield reductions were usually associated with reduced grain size and weight.