Weed Management

Authors: Kelly Nichols

Chelated iron is one of a limited number of active ingredients allowed for use in weed control in lawns in Montgomery County. Research trials were conducted from 2023 to 2025 near College Park, Maryland, to determine the efficacy of chelated iron (Fiesta®) on summer weeds. Various rates and application timings of the liquid and granular formulations were used. Higher rates and applications closer together (less than four weeks apart) are more effective for weeds such as white clover, large crabgrass, and dandelion. More than two applications throughout the year, including in late summer, may be needed to control dandelion and plantain, perennial weeds with more carbohydrate storage in their taproots. While chelated iron shows some efficacy and can have a place in a turf weed control program, cost and labor requirements should be weighed (e.g., spot spraying instead of broadcast applications), and cultural control practices should be continued. Author: Kelly Nichols; Title: Efficacy of Chelated Iron in Turf Weed Control (FS-2026-0806).

Authors: Rashmi Sahu - Hemendra Kumar, Ph.D. - Andrew Ristvey - Luke Macaulay - Stanton Gill

This guide provides an overview of the requirements and procedures for obtaining a Remote Pilot Certificate under FAA Part 107 and registering drones for legal operation in the United States. It explains eligibility criteria, knowledge test requirements, and the certification process for commercial small unmanned aircraft system (sUAS) operators. In addition, it summarizes key operational rules under Part 107, such as visual line-of-sight, altitude limitations, airspace authorization, and safety responsibilities. Designed for students, researchers, agricultural professionals, and new drone operators, this resource serves as a practical reference for understanding FAA compliance and promoting safe, responsible, and lawful drone operations. The guide supports the growing use of drones in applications such as precision agriculture, mapping, environmental monitoring, and aerial data collection. Authors: Rashmi Sahu, Dr. Hemendra Kumar, Dr. Andrew Ristvey, Dr. Luke Macaulay, and Stanton Gill; Title: Guide for FAA Part 107 Certification and Drone Registration (FS-2026-0803.