How to prevent and control common pests and diseases of Shatang mandarin? The methods are here
Shatang mandarin is a famous and superior variety of citrus with extremely high nutritional value, and it is extremely popular among consumers on the market. However, once management is improper during the planting process, various pests and diseases will occur, seriously affecting quality and yield. So what are the main pests and diseases of Shatang mandarin? Let's take a look.
1. Citrus canker
It occurs throughout the year and mainly harms leaves, twigs and fruits. After onset, it causes leaf drop and fruit drop. In severe cases, twigs die, and the fruits rot in large quantities.
Prevention and control methods: When clearing the orchard in winter, thoroughly remove diseased branches and leaves. When the disease occurs in summer, also remove diseased branches and leaves. During the shoot-growing periods in spring, summer and autumn, before the leaves unfold, spray Tuzet or Topsin for prevention and control.
2. Anthracnose
Anthracnose can be divided into acute and chronic types. It generally occurs from April to August and can harm leaves, twigs and fruits. The symptoms on each part are also different. When leaves are infected, brown spots appear and they gradually wither and fall off; when twigs are infected, they gradually curl and dry up, and the diseased bark dries and falls off; when fruits are infected, the diseased fruits rot and turn black, shrink into mummified fruits, and hang on the tree without falling or drop off.
Prevention and control methods: Strengthen fertilizer and water management, apply additional fertilizer reasonably, increase the plant's disease resistance, do a good job in orchard clearing, burn or deeply bury diseased branches and fallen leaves in a centralized manner, and comprehensively spray lime sulfur mixture to disinfect and sterilize. When the disease occurs, spray Bordeaux mixture, Tuzet, carbendazim and other agents for prevention and control, with good results.
3. Huanglongbing
Huanglongbing is not only a common disease of Shatang mandarin, but also a common disease of citrus fruit trees. When this disease occurs, in addition to yellow shoots, it also has very obvious characteristics: yellowing at the base or edge of leaves, with irregular mottled leaves showing alternating yellow and green.
Prevention and control methods: The transmission route of this disease is the Asian citrus psyllid, so to prevent and control this disease, the first step is to prevent and control the Asian citrus psyllid. During the tender shoot period, spray omethoate, pirimicarb, imidacloprid and other agents for prevention and control. In addition, diseased plants should be removed promptly to eliminate the pathogen.
4. Pests
The pests of Shatang mandarin include mites, scale insects, longhorn beetles, as well as aphids and leafminers. They bore into and feed on the plants, constantly gnawing on the tender parts of the plants or sucking sap, causing the plants to grow weakly, affecting yield and quality, and causing great harm.
Prevention and control methods: The prevention and control methods for pests should combine agricultural control, physical control and chemical control, and can include manual capture, trapping and killing, and chemical spraying.
The above are the prevention and control methods for common pests and diseases of Shatang mandarin. We hope it can help you. To learn more related knowledge, please follow us.