Control of four major diseases in Ophiopogon japonicus cultivation

If you just listen to the name Ophiopogon, some people may think that it is a kind of wheat and a kind of food crop, but this is not the case. Ophiopogon is a kind of traditional Chinese medicine, and its root can be used as medicinal material, so its cultivation is still quite common in our country.

What is Ophiopogon japonicus

Ophiopogon japonicus (Ophiopogon japonicus), also known as Ophiopogon japonicus, is a perennial evergreen herb of Liliaceae. The fibrous root is stout, and the top or middle of the root often expands into fusiform fleshy pieces. Put into medicine with root tuber.

Growth environment of Ophiopogon japonicus

Wheat winter is suitable for slightly humid soil environment, which needs more water. In addition to timely irrigation (root water) to infiltrate the soil after planting to promote the rapid release of new reports of seedlings, in the first ten days of May, the weather is dry and hot, the soil water evaporates quickly, and it should also be irrigated in time. In case of drought in winter and spring, it should be irrigated once or twice before the first ten days of February to promote root block growth.

Geographical distribution of Ophiopogon japonicus

Mainly produced in Sichuan, Zhejiang. Ophiopogon japonicus is distributed in Jiangxi, Anhui, Zhejiang, Fujian, Sichuan, Guizhou, Yunnan, Guangxi and other places.

Control of four major diseases in Ophiopogon japonicus cultivation

1. Black spot:

Symptoms: the disease often begins in mid-April and is at its peak from June to July. At the initial stage of the disease, the leaves turned yellow, and gradually spread to the base of the leaves, resulting in water-immersed spots of different colors, such as green, white, yellow and so on. In general, the outer leaves of the plant are easy to suffer, and the damaged leaves gradually curl and wither, affecting the growth. The pathogen overwintered in the soil with diseased leaves and became the source of infection in the second year. It is easy to get sick in rainy season. If the soil is thin or too much nitrogen fertilizer is applied, the disease resistance of the plant is weakened, and the disease is serious.

Prevention and control methods:

① was planted with healthy seedlings.

Before planting ②, the seedlings were invaded with 100x Bordeaux solution or 65% Zinc wettable powder for 5 minutes to prevent the seedlings from carrying bacteria.

③ strengthens field management and removes stagnant water in time.

④ cleaned up the withered and diseased leaves in winter and burned them.

During the onset of ⑤, it was sprayed with 200 times Bordeaux solution or 1000 times carbendazim solution, once every 10 days, 3-4 times successively.

2. Root knot nematode disease:

Symptoms: the roots of plants damaged by nematodes form rosary-shaped root knots of different sizes, and adventitious hairy roots can grow on the root knots. The ends of these hairy roots are again infected by nematodes to form small root knots. There is also a root knot on the tuber root, the whisker root is shortened, and the epidermis is rough and cracked, showing reddish brown. Cut open the root knot, you can see the white shiny ball, that is, the female adult.

Prevention and control methods:

① does a good job in crop rotation. Do not rotate with tobacco, Ziyunying, beans, potatoes, melons, Atractylodes macrocephala, Salvia miltiorrhiza and other crops, but preferably with Gramineae crops.

② chooses disease-free seedlings to cut off the old roots to prevent carrying insects.

③ was used to treat the soil. Before planting, 5 kg of 5 grams of phosphorus granules per mu can be applied to the border soil, or 40% methyl isosphos EC can be used, 1 kg per mu with fine sand scattered in the border soil, mixed with the topsoil, and then planted.

Third, mole cricket:

Disease: commonly known as "native dog". Both adults and nymphs can bite the roots of seedlings. Three generations a year, overwintering as adults or nymphs. It began to happen from March to April the following year. More in the nocturnal activity, like to fly, phototaxis and feces.

Prevention and control methods:

Before planting, ① combined with soil preparation, with 50% phoxim EC 0.5kg per mu, mixed with water into 800x liquid, sprayed the soil surface, and turned the topsoil into the soil.

During the growing period of ② Ophiopogon, 3 kg of 5% phoxim granules or 3 kg of 5% methyl isophos granules were used per mu, and 20-30 kg of fine soil were mixed and scattered evenly on the border soil.

③ was trapped and killed with spices.

4. Grubs:

Disease: it usually occurs from August to September, harming the roots and seedlings and affecting the growth.

Control method: it can be sprayed with 200 times liquid of 90% trichlorfon.

Ophiopogon japonicus mainly grows in Sichuan and other places, but in the process of planting Ophiopogon japonicus, in order to obtain high yield, it is very important to understand the disease. First of all, it is very helpful to understand the symptoms and treatment of some common diseases.