Control methods of common diseases and insect pests of tangerine

Sand sugar orange is a famous variety of citrus, which has high nutritional value and is very loved by consumers in the market, but once it is not properly managed in the planting process, there will be a variety of diseases and insect pests, seriously affecting the quality and yield. So what are the main diseases and insect pests of sugar orange? Let's take a look.

1. Ulcer disease

It occurs throughout the year, mainly harming leaves, branches and fruits, which will cause the phenomenon of falling leaves and fruits after the disease. when it is serious, the branches will die slightly and the fruits will rot a lot.

Prevention and control methods: when clearing the garden in winter, diseased branches and leaves should be removed thoroughly, and diseased branches and leaves should also be removed in summer. When the leaves are not unfolded in the three seasons of spring, summer and autumn, you can spray Tuibuxide or topiramate to control.

2. Anthrax

Anthrax can be divided into acute and chronic, generally in April-August attack, can harm leaves, branches and fruit, each part of the attack symptoms are also different. When the leaves are infected, brown spots appear and gradually wither and fall off; after slightly infected, the branches will gradually curl and dry, and the diseased skin will dry up and fall off; after the infected fruit, the diseased fruit will rot and turn black, dry and shrink into a stiff fruit, and the tree will not fall or fall off.

Prevention and control methods: strengthen fertilizer and water management, reasonable topdressing, increase plant disease resistance, do a good job in garden cleaning, concentrated burning of diseased branches and leaves will be deeply buried, and comprehensively spray stone-sulfur mixture for disinfection and sterilization. Bordeaux solution, carbendazim and other agents can be sprayed when the disease occurs, and the effect is better.

3. Huanglong disease

Huanglong disease is not only a common disease of sand sugar orange, but also a common disease of citrus fruit trees. in addition to yellow shoots, Huanglong disease has obvious characteristics: yellowing at the base or edge of leaves and irregular yellow-green mottled leaves.

Control method: the transmission route of this disease is citrus planthopper, so in order to control this disease, we must first control citrus planthopper, spray omethoate, aphid lice and imidacloprid during the tender shoot period, and eradicate the pathogen in time when diseased plants are found.

4. Insect pests

The pests of citrus include mites, scales, longicorn beetles, aphids and leaf moths, which will eat on the plants, constantly gnaw on the young parts of the plants or suck up juice, resulting in weak plant growth, requiring yield and quality, and doing great harm.

Prevention and control methods: the methods of pest control should be the combination of agricultural control, physical control and chemical control, such as artificial hunting, trapping, chemical spraying and so on.

The above are the control methods of common diseases and insect pests of sugar orange. I hope I can help you. If you want to know more about it, please pay attention to us.