Common diseases of Ilex pubescens
leaf spot
Symptoms: Ilex pubescens leaves are gray-brown spots, mostly round or oval. When the humidity is high, a gray-white mold layer is formed on the surface of the affected area.
Preventive measures include: removing diseased leaves and burning them in time to reduce the source of infection; Applying oak leaves or cottonseed powder to the soil; When plants are sprayed with copper preparation such as Bordeaux solution or bactericide such as thiram, 75% chlorothalonil wettable powder can be sprayed 600 times.
Branch blight
The disease will make the epidermis of Ilex pubescens branches brown and the big leaves wither and fall off. Because plants are not nourished, they will die. The symptoms of the disease are very similar to the death of plants due to water loss, so we should pay attention to distinguish and find the disease in time. Moreover, once symptoms appear, they are often more serious, and prevention is relatively difficult. Generally, prevention is the mainstay.
The control method is as follows:
① Immediately after pruning, spray 800 times Angel wettable powder solution and 1000 times amidine solution for protection to prevent germs from invading from the wound;
② Spray 600 times sterile solution of bactericide or 600 times solution of Xinziqing wettable powder every 10 day for three times.
root rot
Can spray 10% antibacterial agent 40 1 acetic acid solution 1000 times.
Common pests of holly
For the prevention of insect pests, we should first choose healthy holly seedlings for planting, the planting density should be appropriate, and pay attention to ventilation.
50% chlorpyrifos EC 1000 times can be sprayed on aphids, leafhoppers and scale insects. When the red spider is endangered, it can be sprayed with 20% triadimefon wettable powder 1000 times.
In addition, there is a common injury caused by the round shield scale. The symptoms are as follows: at the initial stage of injury, the leaves turn yellow in spots, the whole leaves turn yellow seriously, and then die. You can spray 2000 times 48% magic powder.