Dec 20, 2018

Impact of pesticides on residues studied as part of grant

Washington State University’s Lav Khot will look to reduce reliance on broad spectrum pesticides that result in residues on food with an award from the Foundation for Food and Agriculture Research (FFAR).

“In the lab, we’ll look at how efficient we are in effectively delivering ozonated water as spray to control insects and other pests,” said Khot, the principal investigator on the grant. “The challenge is to deliver the required concentration at the point-of-contact. If we’re successful, then we’ll apply the sprays in a limited manner with the goal of reducing chemical residues on the produce.”Khot and his collaborators received one of FFAR’s New Investigator awards for 2018, which includes a three-year, $300,000 grant. Part of the grant will be used to study the usefulness of ozonated water, or water that has the O₃ molecule_, also known as ozone_, dissolved into it.

Khot, an assistant professor in the Department of Biological Systems Engineering, said some commercial companies are advertising new ozonated water sprayers that have made promising claims regarding pest and disease control outcomes in orchard crops. Growers want independent data and validation before making a significant investment into these technologies.

Khot and his team will also look at emerging technologies to study new organic products like plant extracts and highly refined petroleum oils. They will test application using smart sprayers to study their effectiveness in pest control, Khot said.

“There’s a lot of interest in these oils,” Khot said. “They’ve been very efficient in fighting citrus greening disease in Florida, and we want to see if they can be used in Washington agriculture.”

Khot is collaborating with fellow WSU scientists Betsy Beers, Michelle Moyer, and Gwen Hoheisel, as well as with Matthew Grieshop at Michigan State University and Heping Zhu at USDA-ARS on this project.