What are the precautions during the eggplant seedling stage? A full analysis of the latest management key points

During the eggplant planting process, the seedling stage is the period when problems are most likely to occur. At this time, the seedlings have weak resistance, and once a problem occurs, it can very easily cause seedling death. Below, the editor has compiled the problems that are prone to occur during the eggplant seedling stage and their solutions. Let's take a look.

1. Phytophthora blight

Eggplant phytophthora blight mainly harms the fruit, stems, leaves, and floral organs. It is most likely to occur during the seedling stage, mainly harming the stems. The pathogen of this disease belongs to the oomycetes. The optimum growth temperature for the pathogen is 28-30 degrees, the disease onset temperature is 30 degrees, and the relative air humidity is 85%. Such temperature and humidity conditions are suitable for the formation of pathogen spores. The disease is prone to occur under high temperature and heavy rain, and when humidity is high.

Control method: In addition to strengthening cultivation management, the key is chemical control. During early prevention, protective fungicides can be sprayed. If disease symptoms appear, cymoxanil mancozeb, etc. can be sprayed for control.

2. Graft union disease

In order to prevent verticillium wilt and fusarium wilt, many eggplants are now grafted, but the graft union after grafting has become a pathway for pathogen invasion. When the graft union is infected, if it is buried too deep during transplanting or the plastic film is covered too high, the humidity at the graft union is relatively high, which also very easily causes pathogen infection, and in severe cases causes eggplant wilting and dead plants. When the air humidity in the greenhouse is relatively high, dew will condense at the graft union, giving pathogens an opportunity.

Solution: Therefore, attention should be paid to protecting the graft union to prevent disease occurrence. When grafting, the rootstock stem should not be too low, transplanting should not be too deep, and plastic film covering should expose the graft union. In this way, the humidity at the graft union is kept low and pathogen infection is reduced. For plants that have not developed the disease, a broad-spectrum fungicide can be sprayed on the stems or mixed into a paste and applied to the stems.

3. Physiological boron deficiency

One reason for boron deficiency during the eggplant seedling stage is insufficient boron fertilizer supplementation, and the other is that to avoid excessive vegetative growth of eggplant, water control measures are adopted, which affects the absorption of boron.

Control method: Applying an appropriate amount of boron fertilizer in the base fertilizer is beneficial for establishing a strong root system during the eggplant seedling stage. Generally, 0.5-1 kg of boron fertilizer is added when applying base fertilizer, which can meet the eggplant's demand for boron. After transplanting eggplant, spray boron-containing foliar fertilizer in a timely manner, continuously spraying twice. In addition, attention should be paid to timely watering to avoid uneven drought and waterlogging.

  The above is an introduction to the precautions during the eggplant seedling stage. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.