鸭梨果实轮纹病潜伏侵染时期及采后发病规律的研究

Study on the Stage of Latent Infection and Regularity of Development of the Pear Ring Rot Disease after Postharvest

本试验以鸭梨为试材果实,研究了不同发育期套袋处理、解袋暴露处理、涂抹和刺伤接种轮纹病菌孢子悬液处理的鸭梨果实采后不同时期的发病规律。结果表明,鸭梨轮纹病菌主要侵染期为盛花期后50～70d,但盛花期110d以后仍然可以侵染,而盛花期后50d内不易感染轮纹病菌;轮纹病病原菌更容易通过伤口侵染;在采后梯度降温贮藏条件下,鸭梨轮纹病的集中发病期为采后40～60d;接种孢子悬液使果实的发病期提前、发病率提高。

In piricola, the order to make sure the latent infection and rotting stage of the ring rot disease caused by Physalospora fruit was bagged and un-bagged at different after blossom, and the smearing and inoculation with Physalospora piricola spore were also conducted regularly during the growth of fruit. The results showed that the main infection time of P. piricola to the pear fruit was from 50 d to 70 d after blossom, the infection was also occurred after 110 d of blossom, but it was not easy to be infected within 50 d after blossom. The pathogen was easily infected the fruit through tiny wound. The rotting fruit was mainly took place at the stage of 40 - 60 d after harvest at the step-cooling storage condition. The fruit inoculated with spore solution at growth stage was more easily decayed than the control.