How to prevent and control Huanglongbing in Shantang mandarin? Detailed practical techniques
What is Shantang mandarin Huanglongbing? How to prevent and control Shantang mandarin Huanglongbing? We also ask experienced netizens to help explain. Shantang mandarin Huanglongbing, also known as yellow shoot disease, is an important disease on citrus and a major domestic plant quarantine target, capable of destroying an entire grove of citrus trees. Therefore, Zhongdiwang has compiled the harm and control of Huanglongbing to Shantang mandarin...
What is Shantang mandarin Huanglongbing? How to prevent and control Shantang mandarin Huanglongbing? We also ask experienced netizens to help explainShantang mandarin Huanglongbing, also known as yellow shoot disease, is an important disease on citrus and a major domestic plant quarantine target, capable of destroying an entire grove of citrus trees. Therefore, Zhongdiwang has compiled the harm and control methods of Huanglongbing to Shantang mandarin, listed in detail below for netizens' reference.
The harm of Shantang mandarin Huanglongbing:
In the early stage of Shantang mandarin Huanglongbing, "yellow shoots" with uniformly yellowed leaves appear on the tree canopy, or irregular mottling of alternating yellow and green where leaves begin to yellow from near the base of the veins or from the leaf margins. On new shoot leaves that sprout again on diseased branches, the areas near the main and lateral veins remain green while the mesophyll yellows.
In addition, when Shantang mandarin plants in the initial stage of Huanglongbing sprout new shoots, a small portion of yellowed new shoots often emerges from the green canopy, which is the so-called "inserted golden flowers".
The spread of Huanglongbing is mainly caused by the Asian citrus psyllid, which feeds on the sap of diseased plants and then transmits the disease to healthy trees through its saliva.
Control methods for Shantang mandarin Huanglongbing:
Method one,Because the psyllid is the main insect pest spreading Huanglongbing, the first prevention method is to control and manage the Asian citrus psyllid so that Shantang mandarin branches and shoots emerge uniformly. During each period of tender shoot emergence, you can use 25% Shāmiekuai at 1000 times dilution, or 4.5% Haolü microemulsion at 1500 times dilution, or 20% Wanchongdi at 1500 times dilution to spray and protect the shoots.
Method two,For fruit trees with mild Huanglongbing, drill a hole at the base of the main trunk; the hole depth should be 2/3 of the main trunk diameter, then inject 2 to 5 liters of 1000×10-6 tetracycline hydrochloride solution through the hole opening with a syringe.
Method three,For fruit trees with severe Huanglongbing, once discovered, it is recommended to dig them out immediately, remove them from the orchard and burn them.
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