Epiphytic Populations of Xanthomonas albilineans and Subsequent Sugarcane Stalk Infection Are Linked to Rainfall in Guadeloupe
Epiphytic Populations of Xanthomonas albilineans and Subsequent Sugarcane Stalk Infection Are Linked to Rainfall in Guadeloupe
复制标题
DOI：
10.1094/pdis-93-4-0339
复制
发表时间：
2009-04-01
期刊：
影响因子：
4.5
通讯作者：
Daugrois, J. -H.
中科院分区：
文献类型：
--
作者：
Champoiseau, P.;Rott, P.;Daugrois, J. -H.
在瓜德罗普建立了三个独立的田间试验，在不同的农艺和降雨条件下10研究甘蔗叶腐病的病原体白叶枯病菌（Xanthomonasalbilineans）对甘蔗植物的叶际污染和感染。无病害但易受叶烫伤的品种。B69566在三个1年的作物周期中种植和监测。在无病试验附近的甘蔗田中存在叶腐病污染的甘蔗叶圈出现严重的早期污染。后来，一些特殊的气象事件，如热带风暴，也对病原体的空中传播起到了重要作用。木蠹蛾附生种群间呈显著正相关。albilineans的最大附生种群数与降雨量之间存在显著的相关性，但叶片坏死症状的发生并不总是与随后的茎部感染有关。albilneans，降雨和随后的茎感染之间。因此，降雨量是风险评估中需要考虑的关键因素。在潮湿的热带地区，可能必须修订甘蔗叶枯病流行的标准、健康甘蔗材料的繁殖规程和叶枯病抗性的筛选方法。
Three separate Field trials were established in Guadeloupe under different agronomic and rainfall Conditions 10 Study phyllosphere contamination and infection of sugarcane plants by Xanthomonas albilineans, the causal agent Of Sugarcane leaf scald. Disease-free and leaf scald susceptible cv. B69566 was planted and monitored during three 1-year crop cycles. Presence of leaf scald contaminated sugarcane fields in the proximity of the disease-free trials appeared critical ill early contamination of the sugarcane phyllosphere. Later on, particular meteorological events, such as tropical storms, were also important in aerial spread of the pathogen. A positive correlation was round between epiphytic populations of X. albilineans and severity of leaf necrotic symptoms, but Occurrence of leaf symptoms was not always related to subsequent stalk infection, However, when the data of the three crop seasons were considered together,,I high correlation was found between rainfall and maximum epiphytic Populations of X. albilneans, and between rainfall and Subsequent stalk infections. Consequently, rainfall is a key factor to be considered in evaluation of risk,. of leaf scald epidemics, and protocols for propagation of healthy sugarcane material and screening method,, for leaf scald resistance may have to be revised in humid tropical locations.