A Detailed Guide to Controlling Common Diseases of Cilantro

Cilantro has a long history of cultivation in China, and it is one of the side vegetables that many people love to eat. But it is also because of its unique aroma that it has become a vegetable many people hate. In fact, cilantro has the effect of strengthening the stomach and aiding digestion, and its fruit can also be used as medicine, with the effect of dispelling wind and clearing phlegm. So what diseases will cilantro encounter during the growing process? Below, the editor will talk with everyone about the common diseases of cilantro.

1. Leaf blight

Once leaf blight begins, it will immediately spread to the surrounding area and even the whole plot, causing relatively serious harm to cilantro. When it occurs, it mainly damages the cilantro leaves; affected leaves turn brown, and when there is excess moisture, the leaves will also rot. In severe cases, it will invade along the leaf veins into the heart leaves, causing a reduction in cilantro yield. The cause of the disease is generally that the seeds carry pathogens, so the seeds should be disinfected before sowing. For seed management, ventilation and drainage of the cilantro plot should be strengthened. When the disease is found, fungicides such as mancozeb can be sprayed for control.

2. Root rot

Root rot mainly occurs in lower-lying and relatively moist areas, and it mainly harms the roots of cilantro. The roots will appear brown, rotten, and with almost no branch roots. With a gentle pull by hand, they break off, and this kind of cilantro loses its commercial value. Try not to plant on moist, low-lying land, because excessive moisture can easily lead to root rot. If chemical treatment is used, the main approach is to change the soil properties; fungicides such as carbendazim can be mixed into the soil and stirred, then scattered into the ditch before sowing.

3. Mosaic virus disease

Mosaic virus disease mainly occurs when cilantro is grown in greenhouses in winter. Yellow leaves will appear on the cilantro plants, and the most severely affected part is mainly the heart leaves. It will cause cilantro to become short and small, with no new roots or new leaves, and finally lead to withering and death. The virus of viral disease is spread by aphids, and its spread speed is relatively fast. The solution is to disinfect the seeds before sowing, soaking the seeds in an 800-fold dilution of 50% chloroisobromine cyanuric acid aqueous solution for about 3 hours, then draining the water and sowing. When seedlings emerge, spray 3% acetamiprid suspension once a week for about one month to inhibit the activity of the virus.

4. Sclerotinia disease

Sclerotinia disease is the most common disease in cilantro, with an incidence rate as high as half. The pathogen can grow in the soil for a long time, and continuous cropping of the land provides the pathogen with a very good opportunity to reproduce. There is a chance of infection at any stage of cilantro growth. It harms the roots of cilantro, damaging continuously from bottom to top; white patches appear on the surface, then the surface rots and exposes black sclerotia. The main solution is that the source of the disease must not be subjected to continuous cropping, and quintozene should be mixed with soil for planting. Seeds can be disease-free or disinfected seeds. Pay attention to drainage and ventilation in the cilantro plot, and chemical sprays can also be used.

The above four are relatively common diseases during the cilantro growing process. In fact, the causes of various diseases all include poor ventilation and moisture in the cilantro plot, so the main thing is to pay attention to the ventilation conditions of the cilantro plot. Weed frequently and apply more fertilizer, and try as much as possible to disinfect the seeds before sowing, so as to reduce the disease incidence rate and lower losses.