A method of analyzing a test strip comb member having a plurality of spaced-apart fingers, each of the fingers having been exposed to a respective plant material and each of the fingers being configured to indicate the presence of one or more plant analytes in the respective plant material, the method comprising: capturing an electronic image of the plurality of fingers of the test strip comb member; and analyzing the electronic image with an electronic controller to determine if for a first finger of the test strip comb member a first plant analyte is present and for a second finger of the test strip comb member if a second plant analyte is present, wherein the electronic image is a color image, each pixel of the color image having a plurality of color values, and the step of analyzing the electronic image with the electronic controller to determine if for the first finger of the test strip comb member the first plant analyte is present and for the second finger of the test strip comb member if the second plant analyte is present includes the steps of: analyzing a first portion of the electronic image corresponding to the first finger; determining based on at least one color value of the first portion whether the first plant analyte is bound to the first finger; analyzing a second portion of the electronic image corresponding to the second finger; and determining based on at least one color value of the second portion whether the second plant analyte is bound to the second finger, wherein the plurality of fingers each include a respective region of interest which includes a plurality of spaced apart band locations and the step of analyzing the electronic image with the electronic controller to determine if for the first finger of the test strip comb member the first plant analyte is present and for the second finger of the test strip comb member if the second plant analyte is present includes the steps of: locating the respective region of interest in the electronic image for the first finger and the second finger; thresholding the image based on at least one average background intensity of the electronic image; and segmenting the electronic image to remove small blobs, wherein the step of locating the respective region of interest in the electronic image for the first finger and the second finger includes the steps of: determining an orientation of the test strip comb member in the electronic image; deskewing the image such that the first finger and the second finger of the test strip comb member are vertically oriented; locating a first reference in the electronic image for the first finger, the first region of interest of the first finger being at a first known position relative to the first reference; and locating a second reference in the electronic image for the second finger, the second region of interest of the second finger being at a second known position relative to the second reference. capturing an electronic image of the plurality of fingers of the test strip comb member; and analyzing the electronic image with an electronic controller to determine if for a first finger of the test strip comb member a first plant analyte is present and for a second finger of the test strip comb member if a second plant analyte is present, analyzing a first portion of the electronic image corresponding to the first finger; determining based on at least one color value of the first portion whether the first plant analyte is bound to the first finger; analyzing a second portion of the electronic image corresponding to the second finger; and locating the respective region of interest in the electronic image for the first finger and the second finger; thresholding the image based on at least one average background intensity of the electronic image; and segmenting the electronic image to remove small blobs, wherein the step of locating the respective region of interest in the electronic image for the first finger and the second finger includes the steps of: determining an orientation of the test strip comb member in the electronic image; deskewing the image such that the first finger and the second finger of the test strip comb member are vertically oriented; locating a first reference in the electronic image for the first finger, the first region of interest of the first finger being at a first known position relative to the first reference; and locating a second reference in the electronic image for the second finger, the second region of interest of the second finger being at a second known position relative to the second reference. determining an orientation of the test strip comb member in the electronic image; deskewing the image such that the first finger and the second finger of the test strip comb member are vertically oriented; locating a first reference in the electronic image for the first finger, the first region of interest of the first finger being at a first known position relative to the first reference; and locating a second reference in the electronic image for the second finger, the second region of interest of the second finger being at a second known position relative to the second reference.