Kumquat ulcer disease : ulcer disease is a bacterial disease. The pathogen mainly overwinters on the diseased tissue. It is spread by wind, rain, insects and branches and leaves, and spreads by seedlings, scions and fruits. It is easy to get angry after the storm.

[Prevention and control] In addition to planting disease-free seedlings, attention should be paid to the control of leaf miner. If symptoms are found, the diseased branches and leaves should be cut off in time, burned intensively, and sprayed. Especially before and after the typhoon, it is necessary to strengthen the use of drugs. Adhere to the uniform shoot, unified medication, in the bud length of 1 ~ 2 cm, and 7 days after the medication, the drug has thiabium copper, can be killed, Bordeaux liquid, stone sulfur mixture.

Worconia Huanglongbing

[Hazard] Huanglong disease is the number one killer of the citrus industry. It is a bacterial disease. So far, there is no drug that can be completely cured. It is mainly spread by hibiscus, and can also be spread by grafting, diseased scion, seedlings and dodder.

[Prevention and control] Technically, we should do a good job of "three-plate axe", one is to plant disease-free seedlings, the other is to strictly prevent hibiscus, and the third is to dig the diseased trees. In terms of management, the first is to strengthen training and popularize prevention and control knowledge. The second is to establish a joint prevention mechanism, such as signing village rules and regulations, and third, the local government responsibility system.

Anthracnose

[Hazard] Anthrax is a fungal disease that is prone to disease under high temperature and humidity conditions. Cultivation and management should be strengthened, organic fertilizer should be added, nitrogen fertilizer should be avoided, and water should be removed.

[Prevention and treatment] Drug control can be selected by using 65% of the sensible zinc wettable powder 500 times + 70% thiophanate-methyl WP 800 times solution, 77% copper hydroxide (can be killed) WP 500 times.

Citrus leaf miner

[Hazard] The leaf miner is also called a ghost symbol, which mainly harms the tender shoots of the young leaves. It should be placed in a concentrated position. When the bud is about 1 cm long, spray it, and spray it again for about 7 to 10 days.

[Prevention and treatment] The drug can be selected with 25% insecticidal double agent 500 times solution or 5% imidacloprid EC 1500 times solution or 1.8% avermectin EC 2000 times solution or 2.5% deltamethrin 2500 times solution. The above two are used at the same time.

Citrus citrus hibiscus

[Hazard] Citrus hibiscus is a vector insect that spreads Huanglong disease. It mainly sucks young buds and young leaves. The management should pay attention to make the citrus uniforms to facilitate uniform control.

[Prevention and treatment] Drug control can be used 40% chlorpyrifos 1000 times solution, 10% imidacloprid powder 1500 times solution, 20% dimethrin emulsifiable oil 1000 times solution.

More pesticide knowledge , please pay attention to China Pesticide Network

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