How do you have a black rot area with umbilical rot in tomatoes?

How to do with rot of black rot in tomatoes? The umbilical rot is easy to occur during tomato planting. The common disease is water-soaked dark brown spots. The lesions gradually expand into sagging, leathery, brown or black necrotic areas. When it is wet, it has a black mold on the spot. Generally speaking, this situation is caused by calcium deficiency. Therefore, calcium should be added in time for tomato planting. Certain calcium superphosphate can be used to prevent calcium deficiency in the soil. 1% superphosphate can be sprayed during fruit setting. Spray, spray once every 10 days, or spray the young fruit with Merrill's high-efficiency calcium and other calcium products, spray once every 5 days to 7 days, and spray 2 times to 3 times per panicle.

This article URL: Tomatoes appear umbilical rot, there is a black rot area how to do

Serial Laser Distance Sensor

With low-power, miniature size, the serial communication department range sensor with mm accuracy can measure up to 20m, 40m, 60m, 100m, 150m, 200m.
If you want to connect our laser range sensor boards together with your computer, you can directly choose the model with one USB connector.
In your project, you can use our distance sensor panel to measure a distance.
JRT Serial Laser Distance Sensor

Serial Laser Distance Sensor,Serial Communication Laser Distance Sensor,Laser Range Sensor Boards,Distance Sensor Panel

Chengdu JRT Meter Technology Co., Ltd , https://www.rangesensors.com