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波多黎各的番木瓜有两种花叶病,一种叫波多黎各南海岸花叶病,另一种叫伊萨贝拉花叶病。前者的症状是,叶片有色斑,极度扭曲变形而皱缩;果实有绿色和褐色环纹;组织刺伤后仍有乳汁流出。后者的症状是,叶片有黄斑,稍皱,但没有显著扭曲变形;茎干有油斑;组织刺伤后仍有乳汁流出。与此不同的簇顶病的症状是,树冠停止生长、黄化和僵化,组织刺伤后没有乳汁流出。伊萨贝拉花叶病是在波多黎各北部伊萨贝拉镇附近发生的一种新病毒病,它严重威胁着当地番木瓜的前途。其病原病毒的物理特性是:热钝化温度60℃,稀释限度1—100。病毒并
There are two kinds of mosaic disease in Puerto Rico’s papaya, one is called South Pacific Mosaic disease in Puerto Rico and the other is Isabella mosaic disease. Symptoms of the former are that the leaves have stains that are extremely distorted and wrinkled; the fruit has green and brown rings; and there is still milk flowed out after tissue stabbing. The latter symptom is that the leaves have macular, slightly wrinkled, but no significant distortion; the stem has oil spots; there is still milk outflow after tissue stabbing. The symptom of the different cluster head disease is that the crown ceases to grow, yellow and fossils, and there is no milk outflow after tissue stabbing. Isabella Mosaic Disease is a new virus disease that occurs near the town of Isabela in northern Puerto Rico, which seriously threatens the future of papaya in the area. The physical characteristics of the virus is: heat passivation temperature 60 ℃, dilution limit 1-100. Virus and