What about the phenomenon of garlic yellowing? Pay attention to observe whether the root knot nematode is blamed [map]
I believe that people who have had experience in growing garlic have encountered the phenomenon of garlic yellowing. Especially in recent years, due to various factors in production, the phenomenon of garlic yellowing is particularly prominent, resulting in reduced garlic production. The quality of the garlic is also reduced. At present, it is the period of garlic planting, what causes garlic yellowing, and how to avoid the yellowing of garlic, which has become a major concern of many farmers. Garlic is yellow, the main reason is the improper management of fertilizer and water, soil acidification and so on. However, in fact, the yellow color of garlic is more likely to be caused by pests and diseases, especially the root knot nematode disease which is particularly harmful in recent years. Root-knot nematode disease is caused by nematodes infesting crops. There are many kinds of crops that are harmful to root-knot nematodes. If trees, melons, solanaceous fruits, beans and other crops are harmed by nematodes, garlic is not listed. According to experts, in recent years, with the adjustment and upgrading of China's agricultural structure, coupled with factors such as traditional planting patterns and limited arable land, the crop multiplication index is generally high, and vegetables, melons, etc. grown in some plots. The host plants of nematodes have a long time, and the root-knot nematode disease is seriously endangered. More insect sources are left in the soil, and garlic is often rotated or interplanted with these host plants, which leads to the occurrence of garlic root-knot nematode disease, especially It is more serious in greenhouses, greenhouses and protected areas. According to the observation, when the second instar larvae of garlic root-knot nematode harms garlic, the young part (root tip) of the fibrous root will be pierced through a sharp needle. The root knot will hinder the absorption of nutrients and water by the root system, and the root growth will be hindered and often appear. Not a new root phenomenon. However, the symptoms of the aboveground diseased plants are not obvious at the initial stage of the injury, but as the disease progresses, the growth is weak, the leaves are yellowish green, and the leaves are scattered, similar to the symptoms of lack of water and fat. With the development of the disease, the diseased plant gradually yellowed, wilted, and even withered and died. It can be seen from this that prevention of garlic yellowing is inseparable from the control of garlic root knot nematodes. Experts said that prevention and control of root-knot nematodes should focus on prevention and treatment, with prevention as the mainstay. Preventive measures can take agricultural and physical control methods, while root-knot nematodes need to be combined with chemical agents to achieve optimal control. In the choice of pharmaceuticals, farmers can choose Yinghui killing agent. Garlic is yellow, the main reason is the improper management of fertilizer and water, soil acidification and so on. However, in fact, the yellow color of garlic is more likely to be caused by pests and diseases, especially the root knot nematode disease which is particularly harmful in recent years. Root-knot nematode disease is caused by nematodes infesting crops. There are many kinds of crops that are harmful to root-knot nematodes. If trees, melons, solanaceous fruits, beans and other crops are harmed by nematodes, garlic is not listed. According to the observation, when the second instar larvae of garlic root-knot nematode harms garlic, the young part (root tip) of the fibrous root will be pierced through a sharp needle. The root knot will hinder the absorption of nutrients and water by the root system, and the root growth will be hindered and often appear. Not a new root phenomenon. However, the symptoms of the aboveground diseased plants are not obvious at the initial stage of the injury, but as the disease progresses, the growth is weak, the leaves are yellowish green, and the leaves are scattered, similar to the symptoms of lack of water and fat. With the development of the disease, the diseased plant gradually yellowed, wilted, and even withered and died. It can be seen from this that prevention of garlic yellowing is inseparable from the control of garlic root knot nematodes. Experts said that prevention and control of root-knot nematodes should focus on prevention and treatment, with prevention as the mainstay. Preventive measures can take agricultural and physical control methods, while root-knot nematodes need to be combined with chemical agents to achieve optimal control. This article URL: How to do garlic yellowing phenomenon? 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