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进入春季后气温开始回升,风力加强,天气晴好,空气干燥,对于保护地栽培的玫瑰来说,这是一年中最宝贵的时段之一。此时的气候条件最适宜其生长,主枝上可萌发大量光泽鲜亮的嫩枝,根颈部可长出许多紫红色的粗壮水枝,将有很不错的产花量。可是与此同时,几种易发生的病虫害也有可能大规模地发生,造成极大的损失,必须严加预防。一、白粉病春季气温回升后,温室的通风得到改善,外界的干燥空气进来,白天室温一般在22℃以上,湿度较小,夜间温室处于密闭状态,温度15～18℃,水分蒸发后不能及时换气,更会提高室内相对温度,这些条件都利于白粉病孢子的萌发、形成。在这个季节的花卉市场上,染有白粉病的玫瑰比比皆是。普通的预防方法一般是进行常规打药,如喷洒拜
After spring, the temperature starts to rise, the wind strengthens, the weather is fine and the air is dry, which is one of the most precious time of the year for protected cultivated roses. At this time the most suitable climatic conditions for its growth, the main branch can be a lot of shiny bright shoots, roots and neck can grow a lot of purple thick stalks, there will be a very good yield. However, at the same time, several diseases and pests that are prone to occur are also likely to occur on a large scale, causing great losses and must be strictly prevented. First, the powdery mildew Spring temperatures pick up, the greenhouse ventilation to be improved, outside the dry air come in during the day at room temperature generally above 22 ℃, humidity is small, the greenhouse at night was closed, the temperature 15 ~ 18 ℃, after the evaporation of water can not be timely Ventilation, but also increase the indoor relative humidity, these conditions are conducive to the germination of powdery mildew spores, the formation. In this season’s flower market, pink roses are abound. Ordinary prevention methods are generally used to fight drugs, such as spraying worship