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夏播马铃薯主要病虫害有:晚疫病、早疫病、环腐病及瓢虫。防治方法如下:晚疫病:在马铃薯生育期内,遇长时间高温、高湿气候,容易流行晚疫病。在多雨年份,马铃薯生育后期发病更为严重。防治方法:在发病前,植株长到半尺多高时,每隔10天喷一次等量式波尔多液,共喷2～3次,每亩每次用药液100～150斤。如能喷施瑞毒霉或百菌清,防治效果更好。喷药时,植株上下、叶背叶面都要喷到喷匀。
Summer sowing potato pests are: late blight, early blight, ring rot and ladybug. Prevention methods are as follows: Late blight: In the potato growth period, the case of prolonged high temperature, high humidity, prone to late blight. In wet years, the incidence of potato is more serious later in life. Prevention and treatment methods: before the onset of the plant grows to half a foot high, once every 10 days sprayed an equal amount of Bordeaux mixture, a total of 2 to 3 times spray, with 100 to 150 pounds per acre solution. If you can spray Rumex or chlorothalonil, the prevention and treatment effect is better. Spraying, the plant up and down, leaves back to spray to spray evenly.