Skip to Main Content

The crossroads between lemon trees and technology

In warmer southern and western states, citrus orchards are important for feeding and bringing communities together as well as providing major sources of income and revenue. This makes the disease Huanglongbing, or citrus greening, especially dangerous for producers. Citrus greening is a bacterial disease spread by the Asian citrus psyllid that leaves the fruit stunted, covered in patches of lime-green coloration and unmarketable.

Currently, there is no cure for citrus greening, but Ismail Olaniyi, a graduate student in Purdue’s civilOlaniyi holds a lemon next to his face engineering department, is working on a USDA-funded project analyzing the efficacy of new therapies. Working with Jinha Jung, an associate professor of civil engineering and a member of the Institute for Digital Forestry at Purdue, Olaniyi is seeking solutions to cure citrus greening.

Jung provides the background on the project. “I started working with Kranthi Mandadi, associate professor of the Department of Plant Pathology and Microbiology at Texas A&M, when I was an assistant professor at Texas A&M University-Corpus Christi. We worked together to adopt Unmanned Aerial Vehicle (UAV) technologies to monitor citrus orchards. Our current USDA-funded project analyzes the efficacy of new therapies for citrus greening disease, and my research group is leading the effort to develop a citrus-yield prediction model using UAV data.”  

Since it’s difficult to judge the state of a citrus greening infection before fruiting, current research has to wait until harvest to measure how well the treatment protects each tree, going through the time-consuming and physically-painstaking process of harvesting, checking and weighing the fruit to calculate each tree’s yield. 

To address this challenge, Olaniyi is leaning on his specialization in geomatics, the engineering discipline that gathers spatial data without physically touching what is being studied. He is building a yield-estimation model at the individual-tree level. That model takes data from a UAV that has imaging sensors to capture data on each tree’s height, canopy size and other information based on the different wavelengths of light reflected off of tree leaves as it flies over the orchard. Across several months of flights, Olaniyi has used this information to make deductions on the health of each tree, how effective the treatment has been and predict yield to a reasonable precision.

Ismail Olaniyi prepares his UAV for flight. Ismail Olaniyi prepares his UAV for flight.
Aerial view of lemon orchard A birds-eye view of the lemon orchard that Olaniyi helped study using the UAV and his yield-prediction model. Photo provided by Juan Enciso.
Not only will Olaniyi’s work have benefits for plant science research, but it could also be used by growers. He believes his research and other projects like it indicate something crucial for agriculture.

My research is going right into application. This is building synergy and showing how engineers can collaborate with plant scientists, so we can come together and solve problems.”

- Ismail Olaniyi, graduate student in civil engineering

Featured Stories

A close-up of hands with blue nail polish planting sage next to the Native American Educational and Cultural Center
Purdue Agriculture’s Sloan Scholars

The Sloan Indigenous Graduate Partnership (SIGP) is an organization of 11 universities funded by...

Read More
Purdue's bell tower stands tall behind a foreground of purple petunias
Purdue agriculture professors named AAAS Fellows

Purdue College of Agriculture professors Songlin Fei and Tesfaye Mengiste have been named fellows...

Read More
almonds on a table with almond milk
Homemade nut-based dairy analogs raise questions about bacterial risks

Many consumers know the food safety risks of dairy products, eggs and raw meat. But they are less...

Read More
Students working in the Skidmore Lab inside Nelson Hall of Food Science.
CH4 Global partners with Food Entrepreneurship and Manufacturing Institute to combat methane emissions in the cattle industry

The Food Entrepreneurship and Manufacturing Institute (FEMI), housed within Purdue...

Read More
Purdue MANRRS pose with chapter of the year award at MANRRS38
Purdue MANRRS receives chapter of the year award at national conference, making history

For the first time since its founding in 1990, the Purdue University College of...

Read More
A bottle of Boiler Bee Honey sits on the edge of chrome table in Skidmore lab with two students cooking in labcoats and hairnets in the background.
The sweet (and spicy) taste of victory—National Honey Board funds a food science development competition at Purdue

In the past few years, specialty sauces like hot honey combined the classic warm, sweet feeling...

Read More
To Top