【摘要】 在辽宁东部山区人工红松林中,设置了10处固定观测点,对红松落针病(Lophodermium maximum)的流行规律进行了定位研究。该病害于每年4月下旬开始显露病状,5月中旬开始落叶,5月下旬至6月上旬为落叶盛期;罹病针叶落地后,很快出现子囊盘,于6月下旬开始开裂,7月下旬为盛期。子囊孢子飞散盛期为5月下旬至8月上旬,高峰期为7月下旬;在距地面0.3至4.8m的空间范围内子囊孢子的分布无明显差异,子囊孢子的飞散与温度、湿度、降雨密切相关,温度高、湿度大、降雨量多有利于子囊孢子飞散。用硫磺烟剂或代森铵液剂防治该病,均可收到良好效果;7月中旬为最佳施药期。更多还原

【Abstract】 Korean pine needle east caused by Lophodermium maximum is am important disease of Korean pine plantation of Northeastern China. Orientated observation studies were carried out at ten fixed observation points in Korean pine plantation, in the eastern mountainous region of Liaoning province from 1983 to 1986. The results are given as follows: 1. The symptoms of Korean pine needle cast begin showing in the last ten days of April. The needle begin casting in the mid May and abundant period is in the last ten days of May to the first ten days of June. 2. Ascoearps occur quickly on casted needle. 3. Ascocarps begin opening in the last ten days of June and the abundant pe(?)iod in the last ten days of July. The dispersing abundant period of ascospores is from the last ten days of May to the first ten days of August. The high period is in the last ten days of July. There is no significant different for the space distribution of the ascospores from 0.3 to 4.8 metre high. The amount of dispersing aseopores is correlaive with temperature, humidity and precipitation. It is useful to disperse for aseospores with high temperature, humidity and precipitation. 4. Sulphur smoking agent and Ambam liquid have been used for this disease and took good effect. The mid July is the optimum time to use these fungicides.更多还原