Trapping Solution: Tulare County CA Case Study

Asian Citrus Psyllid (ACP) is an invasive species of grave concern because it can carry the disease huanglongbing (HLB), also known as citrus greening. All citrus and closely related species are susceptible hosts for both the insect and the disease. There is no cure once a tree becomes infected. The diseased tree will decline in health until it dies.

As Tulare is one of the most agriculturally productive counties in the USA, special care is put on preserving and maintaining their crops and citrus trees. With ACP being identified as a very extensive problem throughout Southern California, need for a more effective data collecting solution became a necessity.

Challenges

The workflow Tulare County used for ACP survey was paper based, where visits to potential host trees required constant data entry to document monitoring activities. GPS points are a project requirement, and any collection of inaccurate data in a grid name or GPS points could require several trips back to the site for correction. There was no way of editing or updating the collected information in a faster and more efficient way. In a search for a tool that would allow them to meet these needs, they came across GIS Cloud.

The following features were required:

  • Option to use statewide trapping grid (STG) for coordinating trapping projects
  • Easy to use data collection solution for non – GIS users
  • Tool that enables collecting and reviewing of the data on each potential host (trap type, activity action, address, tree species, multiple photos, latitude, longitude…)
  • Mapping tool that has the possibility of editing, labeling and classifying the collected data
  • Mapping tool that gives an overview of locations of the potential hosts with the associated information on a map

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Survey methods for ACP include visual inspections of citrus trees by state and county field inspectors, “branch tap survey,” and the placement of yellow panel “sticky traps”. Mobile Data Collection enabled the gathering of information about each potential host and associated sticky trap

Solution

With the statewide trapping grid system in Map Editor, subgrids (in this case, quints) were distinctly labeled so users could be sent in the field accordingly. By using the Forms Manager in Map Editor, a custom form was specified for the purposes of ACP trapping. Once the users were in the field, they accessed the map with the associated form in Mobile Data Collection app. Data was collected simultaneously from multiple users and sent to the lead account in the office. The lead officer could keep track of the users in real time and make collaborative decisions on the spot. Additionally, with the classification wizard in Map Editor, collected data was classified based on the activity action. Each site was now represented with a different color indicating the action that was completed or needs to be completed on an interactive map.

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Overview of state wide trapping grid and collected data on sites that have been surveyed

Results

  • Data collection solution that enabled survey methods to be faster, effective and accessible by multiple users in real time
  • Data collection solution that has the review/update option of re – entering the values from the field and work even in an offline mode
  • Data collection solution that supports as many custom forms with as many fields as you want
  • Powerful mapping solution that supports different formats of data (statewide trapping grid), enables classification, labeling and editing of the data