Common Diseases of Perilla frutescens and Their Control

Perilla is very common in the countryside, and wild ones can be seen everywhere by the roadside. In fact, perilla can be used as a medicine and a side dish, which is a crop with high nutritional value. Although there is a wide range of wild areas in the countryside, as the value of perilla is discovered, the market begins to fall short of demand. So began a large area of artificial planting, but perilla, like other crops, there will be a variety of diseases and insect pests. So what diseases and insect pests will appear? How to prevent and cure it? Let's take a look at it.

1. Spot blight

Disease characteristics: spot blight is caused by fungi, mainly because the pathogen of spot blight lurks in the depths of the soil and the remains of the disease to survive the winter. When the temperature gradually rises, it begins to damage the plants, usually in late spring and early summer. Cause harm to the leaves, after the disease of the leaves, black spots will appear on the leaves, the spots will gradually spread and eventually become larger and larger to form patches of different specifications, and then die and fall leaves.

Control methods: when selecting seeds, the varieties with strong disease resistance and good genes can be selected, and the plants with strong growth and disease-free can also be selected as the independent seed of the mother plant. Try not to carry out continuous cropping, prevent continuous cropping, timely topdressing, improve plant disease resistance, timely drainage and irrigation, and reasonably control planting density. After the disease can be sprayed with mancozeb and other chemicals for prevention and treatment.

2. Dodder

Disease characteristics: when many friends are planting, they often find local perilla entangled by orange vines. Plant growth can not be upright, after a period of time, the leaves will gradually become withered, yellowing and falling. Leading to the decline of plant photosynthesis, this is dodder, a parasitic disease on the plant, dodder will wrap around the plant to absorb the nutrition of perilla, so that perilla can not grow and die without nutrition.

Control methods: pay attention to the selection of seeds, pay attention to check whether there are dodder seeds when sowing, and pick them out in time if so. When applying the base fertilizer, the farm manure should be fully mature. Dodder seeds can not withstand the heat of mature farm manure. Regular inspections show that the vines with dodder are uprooted to prevent them from growing. After sowing, spray an appropriate amount of cable EC for control.

3. Root rot

Disease characteristics: root rot is also a fungal disease, root rot spread in many ways, such as Rain Water, growers farming operation, farm manure and many other factors. Generally, it is a high incidence period in the case of uneven temperature and humidity, too much stagnant water, poor soil quality and continuous cropping. Root rot mainly harms the root, the root will begin to rot after the disease, the lateral root growth will be blocked, resulting in insufficient nutrition, the plant can not grow effectively, and in serious cases, it will wither and die directly.

Control methods: similar to spot blight, no continuous cropping and no repeated cropping. When sowing, the seedbed should be turned deep into the sun, and then the base fertilizer should be fully ripened to improve the resistance of the seedlings. Do a good job of drainage and irrigation in the field, improve the planting and growth environment, pull out the diseased plants in time and take them out of the field for destruction. After the onset of the disease, you can use methyl topiramate wettable powder and other drugs for prevention and treatment, once a week, lasting for about one month or 20 days.

These are the common diseases of planting perilla, of course, there are far more than these, such as powdery mildew, rust and so on. Due to the limited time, the editor will not talk about them one by one, but if no timely measures are taken, these diseases will cause devastating damage to the plants. Therefore, we must take various preventive measures and strengthen management to minimize the incidence of diseases. That's all for today's introduction. This article is for reference only. Thank you for your reading and support.