Planting bitter gourd soon after the emergence of seedlings, or suddenly yellowing and dead during the growth process, what is the reason, what should I do if I encounter such a situation. In fact, there are many reasons for such diseases. It may be a physiological cause, or it may be a pest hazard, or a dead tree caused by a disease, or it may die other environmental reasons. So now, let’s see what happened. How to prevent and deal with it.
Dead seedling
First, the virus disease
Bitter gourd is susceptible to viral diseases after being sucked by pests such as thrips, mites, and locusts. There are many types of viral diseases. Some are various vegetables that can infect the same virus, and the virus can be infected by the branches and leaves of farming operations. . Momordica plants may die after infection with the virus. Therefore, to prevent these insects, mainly use acetamiprid drugs plus anti-toxic agent lentinan or oligosaccharide chain protein plus brassinolide, usually once a week.
Root rot
Second, nematode disease
Nematodes harm a variety of vegetables, mainly harming the roots of bitter gourd. They have a needle, which can pierce the bitter gourd root, and then let their saliva enter the root system, causing the roots to grow into tumors and grow abnormally. The root tumor is white after black and loses absorption after the left. Without the absorption of nutrients, it will die. Use Yinghui line killer or Paecilomyces lilacinus, or use avermectin to disinfect with methyl bromide.
Nematode disease
Third, soil-borne diseases
The main soil-borne diseases endangered bitter melons causing dead trees. Common root rot, blight, Phytophthora, and blight are occurring in the whole period, and the most serious damage is caused. Seedlings are prone to death. Stem rot, damaged vascular bundle, will die. The Phytophthora roots rot, the skin and xylem are separated, water-soaked, and finally dead. Root rot damage roots rot, leaving a vascular bundle, and the upper part is dead. Spraying carbendazim wind sterilizing agent to prevent root rot; pouring 50% benomyl WP 1500 times solution to control blight; use 72% kelu WP 500-800 times solution to prevent Phytophthora.
Fusarium wilt
Fourth, improper management
Sometimes the soil is knotted or sticky. If it is more serious, the roots can't breathe. If there is a possibility of hypoxia and suffocation, then the seedlings will die. Sometimes the fertilization is insufficient, and the malnutrition causes the yellow flower to die. Fertilization concentration is too high, too close to the root will die. It can be cultivated, fertilized to maintain distance, melt water use, and reduce concentration.
Yellowing
The main cause of bitter gourd is the disease and insect pests. Others are the amount of fertilizer and water management, prevention and treatment of diseases, improvement of the growing environment, and nutritional adjustment, which can prevent dead trees.
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