Before the opening, Xiaobian wants to introduce you to an interesting thing, please see the following picture:

I guess everyone guessed what it is, yes, this test paper is called water sensitive paper, which is specially used to test the quality of pesticide spray.

In fact, the application effect of the plant protection drone is not immediate, and it usually takes about three days to reflect the control effect. Many companies are willing to use the relevant measuring equipment to evaluate the spray quality of their plant protection drones during initial development and later demonstration experiments.

At present, the most convenient method for detecting spray quality in the industry is the water-sensitive paper method.

The "fog drop test card" often mentioned by the plant protection personnel is actually water sensitive paper. Water sensitive paper is a highly sensitive professional test paper. When the spray mist of the plant protection drone falls to its surface, it immediately produces blue spots. When spraying in the field, the card can be used to measure the droplet distribution, droplet density and coverage, and can also be used to evaluate spray equipment. Spray quality and determination of spray drift.

Spray quality plays a decisive role in pesticide utilization. The relevant parameters of the spray quality are the droplet density, the diameter of the droplet volume, the coverage, etc. By observing the water sensitive paper, relevant information can be obtained.

Operation process is sloppy

The specific operation procedures and precautions for water sensitive paper applications are as follows:

1. When testing, place the droplet detection card on the target site according to the height of the plant and the density of the leaf. (When used in an orchard, such as a vineyard, it should be placed in the crown, branches, leaves or vines.) The tool fixes it to prevent the wind from moving it.

2. At this point, it should be noted that the cards should be placed in parallel to prevent the droplets from falling on the card and leaving scratches rather than dots due to steep angles.

3. For scientific statistics and error reduction, at least five test cards should be placed in each spray zone to make it reasonable to observe and analyze the droplet deposition distribution.

4. The fog drop detection card is discolored in water, so it should not be touched directly by hand. Be sure to use gloves to operate, and avoid using it in rainy weather or when the air humidity is very high.

5. If the used droplet detection card needs to be saved, it can be stored on the spot or stored in the dark, sealed and dry environment.

At present, through the water-sensitive paper method, it not only helps the plant protection drone producers to continuously improve the quality and level of their products through the experimental results, but also allows more people to witness the application effect of the plant protection drone.

A small piece of water-sensitive paper is like a "medicine mirror" for applying the effect of medicine. I hope that in the plant protection industry of drones, we can meet the spring of wisdom agriculture through experiments.