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How to Manage Pests

Interactive Tools and Models: NEMABASE

The NEMABASE database gives fast, easy access to the host status of plants to plant-parasitic nematodes throughout the world, and helps with rotation and cover cropping decisions for nematode management. Download the entire database or do simple searches on the World Wide Web.

Developed in the UC Davis Department of Nematology, NEMABASE contains extensive lists of cover crops, native plants, crop cultivars, and their status as host for a wide range of nematodes. You'll find information on:

6,100 plant taxa, including higher taxonomic information, geographic origin, growth habit, and use of each plant species.
3,900 nematodes, including details of the higher taxonomic information for 3,900 of the major plant-parasitic nematodes (to the race level).
38,000 interactions, detailing the nature of each plant and nematode interaction, the constraints of the experiment or observation, and the source and quality of the data.

This information has been extracted from nearly 5,000 articles published over the last 90 years in six journals that deal primarily with plant-parasitic nematodes, and in widespread reports assembled in earlier compilations of host records. Approximately 70 percent of the available data on plant and nematode interactions has been gathered into the database.

Why was NEMABASE developed?

NEMABASE collates, interprets, and evaluates available information on the host status of plants to the plant-parasitic nematodes, and makes it available as a basis for management decisions. (More...)

The database:

  • allows selection of nonhost crops, and determination of the availability of resistant cultivars, for species and races of plant-parasitic nematodes;
  • allows selection of cover crops that are nonhosts to resident plant-parasitic nematode populations; and
  • provides rapid search of the available knowledge base for novel species of crops or cover crops that warrant testing in a cropping system in relation to their effect on resident nematode populations.

The development team

Department of Nematology faculty at the University of California, Davis, developed NEMABASE over the past several years with assistance of graduate students and staff.

Funding was provided by the UC Department of Nematology, the UC Statewide Integrated Pest Management Program, and from USDA-Extension Service Smith-Lever IPM funds. (More...)

Availability of NEMABASE

You can gain access to NEMABASE in two ways:

  • Download the database and search engine directly to your PC
  • Do simple searches through the World Wide Web.

See below for more information on each.

PC version: Complete database and search engine for your PC

Hardware and software requirements

NEMABASE is distributed in a FOXPro run-time version. It does not require you to have FOXPro database software. For efficient use of NEMABASE, you'll need

  • A Pentium or 486 PC
  • Windows 3.1 or 95 or better
  • At least 8 MB RAM (preferably 16)
  • SVGA monitor
  • approximately 20 Mb available disk space
  • Windows NT, 2000, or XP + systems will require this additional download
Download NEMABASE from this site
  1. Download the NEMABASE installer (5.6 Mb) to install NEMABASE on your PC under Windows.
  2. When the program has been transferred successfully to your PC,
    • use the Windows Program Manager and select "Run...", then
    • specify the path of the NEMABASE.EXE file
  3. The installer will decompress NEMABASE and install it under Windows.
  4. Windows NT, 2000, or XP + systems will require this additional download
  5. To run NEMABASE, double-click the NEMABASE 1.2 icon.
Getting started

The online help is designed to help you get started, and gives specific information about how to use the program features. Press the HELP button or press F12 at any time to access the Help Menu. (From the Help Menu, double-click in the Memo field of the desired topic.)

  1. Specify plant and nematode. To run a database search, or "query," you must first select a Plant and a Nematode. These may be selected from higher taxon, e.g., family, to intraspecific levels (e.g., variety, cultivar, race). Refer to the Help topic "General Query Procedure" for more information.
  2. Specify criteria. To further specify the search criteria, you may set any number of "filters": Date Range, Host Status, Susceptibility, Tolerance, Nature of Record, Study Site, Soil Texture, Climate, Geographic Origin of record, and Data Quality. Multiple conditions may be designated for each filter.
  3. Begin the search. After selecting the Plant, Nematode, and any desired Filters, click on the Setup box next to the nematode name to move the red arrow in preparation for processing the query. Press the Process button to begin the search.
  4. Output reports. When the search is completed, press Print to generate a report that includes fields you designate. The report can be printed to a printer and to database or text files. The files may be imported into a database program or spreadsheet for further analysis, or into a word processor.

When searching, note that several common names for nematodes or plants may be used preferentially in different regions. Many records will be missed if a query is processed using a common name designation not listed in the nematode or plant names table of NEMABASE. It will always be best to use the genus and species name of the nematode, or genus and species (and variety, if appropriate) of the plant.

World Wide Web version of NEMABASE

The database contents are on the UC Davis Department of Nematology World Wide Web server. Go to "Databases" andthen click on "NEMABASE Nematode-Host Association Database." Enter your search criteria according to the instructions given there.

Database design and field descriptions

NEMABASE is structured as a series of relational database tables with fields for the following features of nematodes and plants, and for their interaction:
Nematode Fields Genus, species, authority, race, common name, order, superfamily, family, sub-family.
Plant Fields Genus, species, authority, variety, cultivar, common name, growth habit, usage, native range, family.
Qualitative Interaction Fields Non-host, resistant/susceptible, tolerant/intolerant; temperature, location, soil texture.
Quantitative Interaction Fields Pf/Pi, damage thresholds, damage function.
Secondary Interactions Fields Fungal, bacterial, virus interactions.
References, Source Fields Author and citation.
Evaluation Comment Fields Quality of information; association, field observation; replicated experiment.

Forty-seven variables are stored in the relational tables. The dictionary lists each field name abbreviation and provides a description.

Comments? Contact Howard Ferris, UC Davis Department of Nematology, at hferris@ucdavis.edu

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Statewide IPM Program, Agriculture and Natural Resources, University of California
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Accessibility   /NEMABASE/index.html revised: July 10, 2014. Contact webmaster.