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首页> 外文期刊>Colture Protette: CP >Epidemiological aspects of Uredo sp. infection on Paris daisy (Argyranthemum frutescens).
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Epidemiological aspects of Uredo sp. infection on Paris daisy (Argyranthemum frutescens).

机译：Uredo sp。的流行病学方面。感染巴黎雏菊（Argyranthemum frutescens）。

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摘要

Trials under controlled conditions were conducted on Paris daisy (Argyranthemum frutescens) cv. Yellow Star to determine the effect of duration of leaf wetness and temperature on disease severity and incubation period of Uredo sp., the causal agentof rust. Duration of leaf wetness and temperature both had significant effects on rust development, evaluated by counting the number of uredospores per plant. The optimal temperature for infection is around 15℃: at such a temperature, 6 h leaf wetness are sufficient to cause severe infection. The incubation period for Uredo sp. was 11-13 days when plants were kept at 20-25℃, 15-16 days at 15-18℃ and 19-20 days when plants were maintained at an average temperature of 10℃. When plants were maintainedat an average temperature of > 25℃, rust did not develop: symptoms were not visible even 30 days after artificial inoculation. In plants kept at an average temperature of 3-4℃, the incubation period was 30 days. On the basis of the data obtained in thepresent study, indications for the adoption of proper cultural practices are provided.
机译：在受控条件下对巴黎雏菊（Argyranthemum frutescens）cv进行了试验。用黄色星号确定叶的湿润时间和温度对锈病的致病因子Uredo sp。病害严重程度和潜伏期的影响。叶的持续时间和温度都对铁锈的产生有显着影响，通过计算每株植物的孢子孢子数量来评估。最佳的感染温度约为15℃：在此温度下，6小时的叶片湿度足以引起严重的感染。 Uredo sp。的潜伏期。将植物保持在20-25℃的温度为11-13天，将植物保持在15-18℃的温度为15-16天，而将植物保持在10℃的平均温度为19-20天。当植物平均温度保持在25℃以上时，不会生锈：即使在人工接种30天后，症状也仍然不可见。在平均温度为3-4℃的植物中，潜伏期为30天。根据本研究获得的数据，为采用适当的文化习惯提供了指示。

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