Why honeysuckle seedlings die

Mr. Li from Qiaotouhe Town, Wuyuan City: I bought more than 300 honeysuckle seedlings at a price of RMB 1 per plant in December last year. Now the seedlings are growing poorly, and some have died. What are the reasons? Is there a cure?

Reporter's reply: After receiving a phone call from Mr. Li, the reporter immediately consulted Wang Xiaoming, a honeysuckle expert from the Provincial Academy of Forestry. Wang Xiaoming said that there are many reasons leading to the death of the honeysuckle seedlings. According to Mr. Li’s seedling source, the initial judgment may be a species problem. That is, Mr. Li is likely to buy a grafted seedling of honeysuckle.

According to Wang Xiaoming, China's honeysuckle production is divided into northern and southern production areas. The varieties of honeysuckle planted in the northern producing areas are mainly varieties of the Lonicera series, such as Jiufeng No.1, Jinfeng No.1 and Menghua No.1-6, etc.; the honeysuckle planted in the southern producing areas is mainly of the Lonicerae species, such as Jin Cuilei, Yin Cuili, Bai Yun, Xiang Lei No.1, Bud Lei No.1 and so on.

Seedlings of the honeysuckle varieties planted in southern China are grafted seedlings, cutting seedlings, and tissue culture seedlings. At present, many grafted seedlings on the market are grafted with old roots of Lonicera macranthoides (usually the root is cut into 10-15 cm or so). Due to the weak vitality of old roots, low survival rate of afforestation and short economic life, it is easy to get root rot. There are also species of northern honeysuckle rootstocks used as rootstocks, but after grafting to survive, there is a phenomenon of mutual exclusion at the later stage, and the tree vigor is not prosperous. If the cultivation and management are not good, it can easily lead to root rot.

The main symptom of root rot is dark, rotten roots, followed by water loss, atrophy, and finally plant death. It is recommended that Mr. Li take honeysuckle seedlings for root inspection. If it is determined that it is a root rot, it is necessary to prevent and treat plants that are not diseased. Chemical control can be used to irrigate the roots with 95% hymexazol 1500 times, the effect is better, and it can also be irrigate with thiophanate-methyl or chlorothalonil 700 times. About 2.5 kilograms of eucalyptus perfusing water, irrigation once every 10 days, even irrigation 2 times. Root rot is a devastating disease of honeysuckle. If symptoms such as dehydration and atrophy of leaves have appeared, it means that prevention and treatment are late. It is imperative to keep the soil dry and prevent root rot pathogens from spreading to the unaffected plants with the water stream.

Wang Xiaoming reminded that scientific selection of seedlings is a guarantee of high quality and high yield cultivation of honeysuckle. When planting honeysuckle in southern areas such as Hunan, it is best to choose good quality honeysuckle tissue culture seedlings, although the price is more expensive, about 5 yuan/plant, but after the virus-free treatment, with less pathogenic bacteria, strong cold resistance, pure varieties, yield The chlorogenic acid content of the active ingredients is high, the growth potential is strong, the root system is developed, and the seedling growth period is short. The survival rate of the general afforestation is above 90%, and the yield in the later period is obvious.

In addition, this year's rain, lack of light, honeysuckle appear slow growth, development delays, some low-lying areas, but also easily lead to root water. If this situation results in poor growth of honeysuckle, it is necessary to conduct management of soil and fertilizer such as ditching, dehumidification, and fertilization.

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