Evaluating new biological and chemical controls for Pythium root dieback of carrot

评估胡萝卜腐霉根顶枯病的新生物和化学控制方法

• 批准号: 451929-2013
• 负责人: McDonald, MaryRuth
• 金额: $ 1.82万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=540548
• 关键词: Evaluating; new; biological; chemical; controls

Pythium root dieback is an extremely destructive disease of carrots in many parts of the world and many regions of Canada, including Ontario and Manitoba. The disease is caused by the soil borne plant pathogen Pythium irregulare and a number of other, related Pythium species. These pathogens produce motile zoospores that are attracted to root exudates and can infect the root at any stage. When carrots are in the seedling stage, any damage to the developing root causes the root to stop growing and to produce several branched tap roots. The disease is called Pythium root dieback and the symptom is known as 'forking' and results in an unmarketable root. In fields with high populations of Pythium pathogens, complete crop failure can result from forking.

腐霉根顶枯病是世界许多地区和加拿大许多地区（包括安大略省和马尼托巴省）胡萝卜的一种极具破坏性的疾病。 该病害是由土传植物病原体不规则腐霉和许多其他相关腐霉属物种引起的。 这些病原体产生活动的游动孢子，被根部分泌物吸引，并可以在任何阶段感染根部。当胡萝卜处于幼苗阶段时，对正在发育的根部的任何损害都会导致根部停止生长并产生多个分枝的直根。这种疾病被称为腐霉根顶枯病，其症状被称为“分叉”，导致根无法销售。 在腐霉病原体大量存在的田地中，分叉可能会导致作物完全歉收。