What causes white spots on cherry tomatoes
1. Biological characteristics: It likes warmth, with an optimum temperature for growth and development of 23-28°C, a night temperature of 15-18°C, and a preference for plenty of sunlight. Its requirement for soil moisture is 60-80%, and it is best suited to deep, loose, fertile, slightly acidic soil with a pH of 6-6.5. 2. Variety introduction: Shengnu: a small-fruited variety, known as...
1. Symptom expressionCherry tomatoes can be affected at both the green and red fruit stages, with unpigmented white lesions appearing symmetrically on both sides of the fruit. There is no flesh at the lesion site, only a layer of white skin remaining.
2. Cause analysis
First, during the mid-to-late growth stage of cherry tomatoes, the supply of water and nutrients is uneven or unstable. Especially during drought, when water supply is disrupted, the leaves need a large amount of water for transpiration, competing with the fruit for water. The water in the flesh is taken away by the leaves, which hinders the growth of the flesh. Second, cherry tomatoes cannot absorb enough calcium and boron from the soil, causing internal nutrient imbalance in the plant, physiological disorder of the flesh tissue cells, and loss of the ability to control water, which hinders the growth of the flesh.
3. Control methods
(1) Water appropriately and in a timely manner. Especially in the mid-to-late fruiting stage of cherry tomatoes, more attention should be paid to a balanced water supply. Watering should be done between 9 and 12 a.m.
(2) Choose disease-resistant varieties.
(3) When the sunlight is strong at noon, shade nets can be appropriately used for covering.
(4) Promote the application of organic active fertilizer, or biological organic compound fertilizer, and adopt formula fertilization.
(5) Supplement calcium fertilizer through the leaves. You can spray 200-300 times diluted amino acid calcium plus Aiduoshou. Calcium fertilizer should be supplemented continuously, and at the same time spray Qifuling (Qifuning), once every 15 days, for a total of 3 sprays.