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脐腐病是番茄的一种主要生理性病害,因发病从果实脐部开始,故得名。发病初期在幼果脐部(即果顶部)出现一水浸状斑点,以后随着果实的生长和病情的发展,病斑逐步扩大,一般病斑直径为1—2厘米,严重的可扩展到果实的三分之一以上。发病后期病斑凹陷,在潮湿条件下,因受腐生霉菌的寄生而呈现出黑色或粉红色。发病果实大多丧失食用价值,因此番茄发生脐腐病为害,会严重影响产量和品质。番茄为什么会发生脐腐病呢?大量研究的共同结论是由于植株缺钙所引起的。番茄植株缺钙的原因是多方面的:一、长期阴雨,土壤含水量过高,影响了根系的正常生
Umbilical rot disease is a major physiological disease of tomato, because of the onset of the umbilical cord from the fruit, it is named. Early onset of juvenile umbilical (ie, the top of the fruit) appeared a flooding-like spots, and later with the growth of the fruit and disease progression, disease gradually expanded, the general lesion diameter of 1-2 cm, can be severely extended to More than a third of the fruit. In the later stages of disease, the lesion is concave and dark or pink due to the parasitic fungus mold in humid conditions. Most of the fruits of the loss of edible value, so the occurrence of umbilicus tomato damage, will seriously affect the yield and quality. Why does tomato produce umbilicus? The common conclusion of numerous studies is due to calcium deficiency in plants. Tomato plant calcium deficiency is due to many reasons: First, long-term overcast, soil moisture is too high, affecting the normal root students