Causes of seedling death of balsam pear and its control methods

With the increase of the planting area of balsam pear, its diseases and insect pests are also aggravated, and the death of balsam pear seedlings in the process of balsam pear planting is a very common phenomenon. When farmers in many areas begin to plant balsam pear, they should first take good preventive measures. So what is the reason for the death of balsam pear seedlings? Let's get to know it.

1. Virus disease

Balsam pear is easy to be infected with virus disease after being sucked by thrips, aphids, and other prickly virus-carrying pests. There are many kinds of virus diseases, and many ingredients can be infected with the same improper, and the virus can also be transmitted by friction between branches and leaves through agricultural operations. Balsam pear plants may die after being infected with virus disease.

Prevention and control methods: so we should pay attention to these insects, mainly use acetamiprid agents plus antiviral lentinan and brassinolide, generally once a week, the control effect is better.

2. Nematode disease

Nematode disease harms a variety of food materials, mainly harms the root system of balsam pear, it has a needle, it can pierce the root system of balsam pear, and then let its saliva into the root system, resulting in nodular root system, abnormal growth. The nodule of the root system is first white and finally black, resulting in a complete loss of absorptive capacity of the root system, and the plant will die without water and nutrients.

Prevention and treatment: use Yinghui nematicide or Paecilomyces lilacinus, or you can use avermectin and methyl bromide to disinfect the soil.

3. Soil-borne diseases

Soil-borne diseases can also cause the death of balsam pear seedlings, such as root rot, Fusarium wilt, Phytophthora, Fusarium wilt, etc., which are the most damaged in the fruiting period, and the seedlings are easy to die; Fusarium wilt causes stem rot, vascular bundle damage, and death of seedlings; Phytophthora will lead to root rot, partial separation of skin and wood, flooding, and eventually dead seedlings; root rot, leaving vascular bundles, and upper parts die.

Prevention and control methods: there are different prevention and control methods for various diseases, such as spraying carbendazim fungicide to control root rot, spraying 50% carbendazim wettable powder 1500 times solution to control Fusarium wilt, and using 72% Kelu wettable powder 500 times solution to control Phytophthora.

4. Improper management

Soil hardening or too sticky will seriously affect the growth and development of the root system, serious hypoxia suffocation death, then there will also be the phenomenon of seedling death. Sometimes fertilization and sowing will lead to malnutrition and yellowing of dead seedlings, or if the concentration of fertilization is too high, it will also die if it is close to the root.

Control methods: timely ploughing and loosening the soil, breaking the soil consolidation, keeping the spacing during fertilization, the seedlings are sensitive to the fertilizer concentration, and the fertilization concentration should be reduced.

The above is the introduction of the causes and control methods of balsam pear seedlings, hope to help you, want to know more related knowledge, please pay attention to us.