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非侵染性病害的种类及田间诊断要点非侵染性病害是由不良环境条件扰乱了植物正常的新陈代谢而引起的。常见的有: (一)营养病:由于某种营养物质过多或缺少,使植株营养失调而发生病害。如氮肥过量造成植物的徒长,组织生长桑嫩而倒伏;又如缺乏微量元素铁能引起果树上的黄化病,缺钾引起棉花的红叶茎枯病等。 (二)温度不适引起的病害:作物生长需要适宜的温度,超过作物能够忍受的温度都能使作物出现生理性病害.如高温干旱、强
Types of Non-Infectious Diseases and Points to Diagnose in the Field Non-infective diseases are caused by disrupting the normal metabolism of plants caused by poor environmental conditions. Common are: (A) Nutritional Diseases: As a result of excessive or lack of nutrients, so that plant malnutrition and disease. Such as excess nitrogen caused by plant lengthened, tissue growth Sang Nen lodging; Another example is the lack of trace elements iron can cause yellowing disease on fruit trees, potassium deficiency caused by cotton leaves blight and so on. (B) diseases caused by temperature discomfort: crop growth requires appropriate temperature, more than the crops can tolerate the temperature of the crop can cause physiological diseases such as high temperature and drought, strong