Send Message

CHNSpec Technology (Zhejiang)Co.,Ltd chnspec@colorspec.cn 86--13732210605

CHNSpec Technology (Zhejiang)Co.,Ltd Company Profile
News
Home > News >
Company News About Application of hyperspectral camera to tea pests and diseases

Application of hyperspectral camera to tea pests and diseases

2024-12-21
Latest company news about Application of hyperspectral camera to tea pests and diseases

Tea inchworm is one of the common pests in tea gardens, which seriously affects the yield and quality of tea. The traditional method of monitoring the damage degree of tea inchworm mainly relies on manual investigation, which has some problems such as low efficiency, strong subjectivity and difficult to realize real-time monitoring in large area. Hyperspectral remote sensing technology has the characteristics of high spectral resolution and rich spectral information, which provides a new way for rapid and accurate monitoring of the harm degree of tea inchworm.

latest company news about Application of hyperspectral camera to tea pests and diseases  0

一、Environmental conditions

The spectral reflectance of tea canopy was measured from 10:00 to 14:00 on a sunny day with no wind, no cloud and good solar visibility. In this study, a 400-1000nm hyperspectral camera was applied, and FS13, a product of Hangzhou Color Spectrum Technology Co., LTD., could be used for related research. During the observation, the field of view Angle was 25, and the height between the detection head of the hyperspectral camera and the top of the tea canopy was about 0.5m. The diameter of the observation range was about 0.22m. In order to reduce the experimental error, the measurements were repeated three times in each sample area, and the average value was taken as the spectral reflection value.

 

二、 Data processing and analysis

1. Comparison of leaf surface appearance between normal tea and tea inchworms.
In this experiment, a series of tea leaves harmed by tea inchworms to different degrees were collected as research subjects, and their spectral data, leaf area index and the number of tea inchworms per mu of tea ruler were respectively collected. The comparison between tea leaves without insect pests and those harmed by tea inchworms was shown in Figure 1:

latest company news about Application of hyperspectral camera to tea pests and diseases  1

The leaves were intact, the leaves were crowded together, and the leaves of the insect-damaged tea were bitten into irregular shapes, their external color became dark yellow, and the structure of the leaves also changed accordingly.


2. Comparison of leaf area index between normal tea and tea inchworm.

latest company news about Application of hyperspectral camera to tea pests and diseases  2

As can be seen from FIG. 2, the leaf area index was greatly affected by the degree of harm caused by tea geometrid. The more tea ruler there were, the more tea leaves were eaten, and the smaller the leaf area index would be.


3. The influence of tea inchworms on the reflectance spectral characteristics of tea canopy.
The influence of insect infestation on tea leaves will lead to some changes in the physical and chemical properties of tea leaves, including the color, structure, water content, chlorophyll content and nutritional status of the leaves. The change of these physical and chemical properties will cause some changes in the value of its spectral characteristic parameters, such as spectral reflectivity, transmittance, absorptivity, red peak and its wavelength position and blue peak and its wavelength position. Therefore, to grasp the normal tea spectral characteristics and related information is the premise and basis of studying the damage of tea by other diseases and pests.

latest company news about Application of hyperspectral camera to tea pests and diseases  3

三、Research significance and prospect

Research significance: This study provides a new technical means for the rapid and accurate monitoring of the harm degree of tea inchworms, helps to timely grasp the occurrence of tea inchworms in tea gardens, provides scientific basis for the accurate prevention and control of diseases and pests in tea gardens, reduces the use of pesticides, and improves the yield and quality of tea.


Research prospects: Future studies can further optimize hyperspectral remote sensing models and improve the accuracy and stability of the models. At the same time, it can be combined with UAV remote sensing, satellite remote sensing and other technologies to achieve a larger range of tea inchworm harm degree monitoring. In addition, the relationship between the harm of tea inchworms and the physiological and ecological changes of tea trees can be deeply studied, and the mechanism of hyperspectral remote sensing monitoring can be revealed from a deeper level.

Events
Contacts
Contacts: Mrs. CHNSpec
Fax: 86--13732210605
Contact Now
Mail Us