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首页> 外文期刊>Plant Disease >Propagule production by Phytophthora ramorum on lilac (Syringa vulgaris) leaf tissue left on the surface of potting mix in nursery pots.
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Propagule production by Phytophthora ramorum on lilac (Syringa vulgaris) leaf tissue left on the surface of potting mix in nursery pots.

机译：毛霉菌（Phytophthora ramorum）在育苗盆中留在盆栽混合物表面的丁香叶（Syringa vulgaris ）上繁殖繁殖。

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摘要

Lilac leaf tissue infected with Phytophthora ramorum was placed on top of potting mix in pots and exposed to different watering regimes or different temperatures to determine if it could serve as a source of inoculum. If pieces of infected leaf were placed in pots containing healthy lilac plants kept under constantly moist conditions or under twice-a-day trickle irrigation for 1 month, inoculum production from infected tissue declined for the first 4 days but declined significantly less steeply under constantly moist conditions. At the end of the experiment, 28% of plants exposed to moist conditions developed root infections, whereas only 6% exposed to trickle irrigation did. If infected leaf pieces were placed on the surface of potting mix in pots containing lilacs and watered for 5 min one, two, or three times a day, inoculum production in the first 4 days declined but declined significantly more slowly in pots watered three times a day. If 0 to 16 leaf pieces were placed on the surface of potting mix in pots containing healthy lilacs under constantly moist conditions, leaf number significantly influenced the incidence of root infection. The effect of temperature was more difficult to quantify. At 10 or 15 degrees C, propagules included zoospores whereas, at 20 or 25 degrees C, they were predominantly sporangia. These results confirm the importance of detached leaves as inoculum producers under greenhouse conditions.
机译：将感染了

Phytophthora ramorum 的丁香叶组织放在盆中的盆栽混合物上，并暴露于不同的浇水方式或不同的温度下，以确定其是否可以用作接种物。如果将受感染的叶子片放在装有健康紫丁香植物的盆中，该植物在持续潮湿的条件下或每天两次twice流灌溉，持续1个月，则受感染组织的接种量在开始的4天内下降，但在持续潮湿的条件下，下降幅度不大条件。在实验结束时，暴露于潮湿条件下的植物中有28％发生了根部感染，而滴灌中只有6％的植物发生了根部感染。如果将感染的叶片放在装有丁香花的花盆中的盆栽混合物表面上，并每天浇水5分钟一次，两次或3次，则最初4天的接种量会下降，但浇水3遍的花盆中的接种量下降的速度要慢得多。天。如果在持续潮湿的条件下，将0到16个叶块放在装有健康紫丁香的花盆中的盆栽混合物表面上，则叶数会显着影响根部感染的发生率。温度的影响更难以量化。在10或15摄氏度下，繁殖体包括游动孢子，而在20或25摄氏度下，繁殖体主要是孢子囊。这些结果证实了在温室条件下离体叶片作为接种物生产者的重要性。

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