Method for detecting and managing nematode population
The present invention is directed to methods and apparatus for pest management using remote sensing technology. One aspect of the present invention relates to a method for detecting plant-parasitic nematodes using hyperspectral reflectance data. Another aspect of the present invention relates to a device for determining the population of reniform nematode in a target. The further aspect of the present invention relates to a method for managing nematode population with variable rate applications of nematicides.
1. A method for detecting nematodes in a target, said method comprising:
collecting reflectance data at a plurality of wavelengths from said target, each of the wavelengths being a wavelength whose intensity is indicative of a level of nematode infestation; and
determining the presence of nematodes associated with the target based on the intensities of the reflectance data.
2. The method of claim 1 , further comprising the step of
analyzing said intensities of said reflectance data to determine nematode population in the target.
3. The method of claim 1 , wherein said target is selected from the group consisting of a cotton plant, a cotton plant canopy, a single cotton plant leaf, and soil in a cotton field.
4. The method of claim 1 , wherein said reflectance data is collected using a remote sensing device.
5. The method of claim 4 , wherein said remote sensing device is an imaging system capable of collecting reflectance data in both the visible and near infrared spectrums.
6. The method of claim 5 , wherein said remote sensing device is capable of collecting reflectance data at wavelengths between 450 nanometers and 950 nanometers.
7. The methods of claim 1 , wherein the reflectance data is collected using a hyperspectral radiometer.
8. The method of claim 1 , wherein the reflectance data is collected using a multispectral radiometer.
9. The method of claim 1 , wherein the step determining the presence of nematodes is performed with a MATLAB based hyperspectral tool kit.
10. The method of claim 9 , wherein the step of determining the presence of nematodes is performed using a neural network.
11. The method of claim 10 , wherein the neural network includes a model trained with reflective data from control groups of cotton plants infested with known nematode populations.
12. A device for detecting or determining the population of reniform nematodes in a target, said device comprising:
a sensor for collecting reflectance data from said target; and
a data processor for analyzing intensities of the reflectance data at wavelengths which are associated with the presence of nematodes to determine whether nematodes are present in or at the target.
13. The device of claim 12 , wherein said sensor is an imaging system capable of collecting hyperspectral reflectance data at wavelengths between 450 nanometers and 950 nanometers.
14. The device of claim 12 , wherein said sensor is an imaging system capable of collecting hyperspectral reflectance data at wavelengths between 450 nanometers and 1340 nanometers.
15. The device of claim 12 , wherein said sensor is a hyperspectroradiometer.
16. The device of claim 15 , wherein said hyperspectroradiometer is a hand-held hyperspectroradiometer.
17. The device of claim 12 , wherein said data processor uses a MATLAB based hyperspectral tool kit.
18. The device of claim 12 , wherein the data processor includes a neural network for analyzing intensities of reflectance data.
19. The device of claim 18 , wherein the neural network includes a model trained with reflective data from control groups of cotton plants infested with known nematode populations.
20. The device of claim 12 , wherein said sensor is an imaging system capable of collecting reflectance data in both the visible and near infrared spectrums.