Preventive measures for bitter eggplant

In view of the above problems, starting with prevention, strengthening comprehensive cultivation and management measures is the key to prevent the production of bitter eggplant in protected areas. The main measures are as follows:

1. Select varieties suitable for planting in protected areas.

Varieties with low temperature resistance, weak light tolerance and light bitterness should be selected when cultivated in protected areas. For newly introduced varieties, seed expansion should be carried out on the basis of successful trial, so as to avoid blind planting and avoid losses.

2. Optimize the production environment in the protected area, and try to meet the physiological needs of eggplant. Pay attention to the selection of greenhouse materials with strong heat preservation ability and drip-free film with good light transmission, and often remove dust deposits and dirt on the greenhouse film to ensure sufficient light. Certain brightening measures can be taken in areas where conditions permit, such as the use of reflective screens, artificial replenishment of light, and so on. Enhance the increasing and heat preservation performance of the protected area, so that the temperature in the protected area can meet the needs of eggplant growth, especially after fruit setting, it is necessary to try to reach the appropriate temperature for eggplant growth, so as to prevent eggplant growth and development from imbalance due to lack of light and heat. Produce bitterness.

3. the selection of rootstocks should be appropriate.

When raising seedlings by grafting, we should not only consider its compatibility, but also consider the effect of rootstocks on the quality of eggplant, and select some rootstocks that have little effect on eggplant quality. At present, the eggplant rootstocks with better application effect in production are mainly Tolubam, red eggplant and so on.

4. Strengthen cultivation management to ensure high quality and high yield.

In the process of planting, attention should be paid to reasonable close planting, and the general control density is 2800-3000 plants per mu. Combined with fruit harvest, senescent branches and leaves can be removed in time in order to penetrate light and prevent disease infection. Adhere to the scientific and rational collocation of organic fertilizer and total nutrient fertilizer. According to the growth process to ensure the necessary water supply, strictly prevent fertilizer and water deficiency or improper supply, indirectly affect the decomposition of esterase in the plant, resulting in bitterness. The production practice shows that after the eggplant is set, the fine weather is chosen, and the mixture of 0.5% potassium dihydrogen phosphate and 1% sucrose is sprayed twice at an interval of 10-15 days, which has an obvious effect on reducing the bitterness of eggplant and improving the yield and quality.