# Citrus ID > Citrus pest and disease identification tool for orchards and gardens. (iPhone/iPad app by United States Department of Agriculture-APHIS.) - Source: https://appshunter.io/ios/app/citrus-id/id819038986 (this page in markdown: same URL + `.md`) - Developer: [United States Department of Agriculture-APHIS](https://appshunter.io/developer/511305053) - Category: Reference, Education - Price: Free - Rating: 2.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 10.0 · 341 MB - Languages: English - Released: 2014-02-21 - Data updated: 2026-06-25 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/citrus-id/id819038986/reviews.md ## What is Citrus ID? Citrus pests and diseases may be found on a number of plant species in various plant families. The Citrus ID Key is primarily intended to help people working or conducting pest surveys in citrus orchards, variety collections, and home gardens, so its focus is limited exclusively to the citrus family (Rutaceae). Although eight genera of Rutaceae are native to the continental United States (Amyris, Choisya, Cneoridium, Esenbeckia, Helietta, Ptelea, Thamnosma, and Zanthoxylum), most of these are unlikely to be encountered in our target locations and can be keyed using regional guides. The cultivars and taxa of citrus and relatives that have been introduced and released for cultivation are the most likely to be encountered in cultivated settings, so the Citrus ID Key concentrates on these taxa. Cultivars of citrus and its relatives are released in the United States through state agencies and to a lesser extent the USDA-ARS National Clonal Germplasm Repository for Citrus & Dates. Our target list of entities was synthesized from the cultivar lists provided by the California Citrus Clonal Protection Program, the Florida Citrus Arboretum, the Florida Chiefland Budwood Distribution Center, the Florida Bureau of Citrus Budwood Registration, and the Texas Budwood Certification Program. Arizona no longer certifies budwood, instead relying on the California program. The resulting target list includes over 500 entities of citrus and relatives cultivated in the United States. Field identification to the level of cultivar remains impossible in most cases. This is partially due to the complicated reticulate breeding history of citrus, but also, selection has generally focused on characters such as taste, disease and stress resistance, and fruiting phenology rather than on characters of ornamental (and thus morphological) value. This key facilitates identification to at least the cultivar group level within citrus (e.g., sweet oranges, sour oranges, etc.), if not beyond for select cultivars. Original illustrations and photography: Unless specifically indicated otherwise, the source for plant images included in Citrus ID Key should be cited as "Herbarium (NCSC)." NCSC is the official abbreviation for the North Carolina State University Herbarium. Any commercial use is prohibited without express written permission. Requests may be addressed to: Herbarium, Department of Plant Biology, North Carolina State University, Raleigh, NC 27695-7612. Original source for Lucid Mobile Key: Saville, A.C., A. Krings, T. Kahn, M.D. Trice, and A.J. Redford. 2011. Citrus ID, Edition 2. USDA APHIS PPQ ITP, Fort Collins and North Carolina State University. http://idtools.org/id/citrus/citrusid/ Key authors: Amanda Saville, Alexander Krings, Tracy Kahn, Matthew Trice, and Amanda Redford ## Key features - Citrus pest and disease identification - Focus on Rutaceae family - Aids orchard and garden surveys - Identifies to cultivar group level - Includes original illustrations and photography ## Frequently asked questions about Citrus ID ### What is Citrus ID primarily used for? Citrus ID is primarily intended to help people working or conducting pest surveys in citrus orchards, variety collections, and home gardens identify citrus pests and diseases. Its focus is limited exclusively to the citrus family (Rutaceae). ### What level of identification can Citrus ID provide? While field identification to the level of cultivar remains impossible in most cases, Citrus ID facilitates identification to at least the cultivar group level within citrus (e.g., sweet oranges, sour oranges), and potentially beyond for select cultivars. ### Does Citrus ID contain advertisements? No, Citrus ID does not contain advertisements. It is a free application with no in-app purchases or ads. ### What devices is Citrus ID compatible with? Citrus ID is compatible with iPhone, iPad, and iPod devices. It was released on February 21, 2014, and last updated on November 27, 2019. ### What is the age rating for Citrus ID? Citrus ID has an age rating of 4+, making it suitable for a wide range of users. The app was developed by the United States Department of Agriculture-APHIS. ### Where do the images in Citrus ID come from? Unless specifically indicated otherwise, the source for plant images included in Citrus ID Key is cited as "Herbarium (NCSC)," which is the North Carolina State University Herbarium. Commercial use of these images is prohibited without express written permission. ### How often is Citrus ID updated? The latest version of Citrus ID is 1.1.0, which was released on November 27, 2019. While there haven't been recent updates, the app provides a stable reference for citrus identification. ### What is the user rating for Citrus ID? Citrus ID has a rating of 2.0 stars from 1 rating. This indicates a limited amount of user feedback available for this application. ## Version history (last 4 releases) ### 1.1.0 — 2019-11-27 Updated due to iOS changes ### 1.0.2 — 2015-09-22 Updates to content and to the latest version of the Lucid Mobile player. ### 1.0.1 — 2014-11-25 fixed crash in iOS 8 ### 1.0.0 — 2014-02-21 No release notes. ## More apps by United States Department of Agriculture-APHIS - [Citrus Pests Key](https://appshunter.io/ios/app/citrus-pests-key/id816016765) - [Citrus Diseases Key](https://appshunter.io/ios/app/citrus-diseases-key/id818939368) - [Dried Botanicals Key](https://appshunter.io/ios/app/dried-botanicals-key/id818972882) - [Terrestrial Mollusc Key](https://appshunter.io/ios/app/terrestrial-mollusc-key/id818984385) - [Palm Symptoms Key](https://appshunter.io/ios/app/palm-symptoms-key/id818991417) - [Palm ID Key](https://appshunter.io/ios/app/palm-id-key/id818999178) All apps by United States Department of Agriculture-APHIS: https://appshunter.io/developer/511305053 ## Related topics [cetrus](https://appshunter.io/ios/topics/cetrus) · [citrus technology group](https://appshunter.io/ios/topics/citrus-technology-group) · [citrus care](https://appshunter.io/ios/topics/citrus-care) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*