Trunk Injection for HLB: Pros and Con

Jim Rogers HLB Management, Pesticides, Research

The pros of injecting the antibiotic oxytetracycline (OTC) into citrus tree trunks to combat HLB appear to be numerous, including increased fruit yield, according to scientist Ute Albrecht. On the other hand, the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researcher only discussed one con, but it was a big one. “Trunk injections cause injury, and long-term …


Glyphosate Decision Disappoints Ag Groups

Jim Rogers Legal, Pesticides

Several national agricultural organizations issued a statement expressing disappointment over the U.S. Supreme Court’s recent glyphosate decision not to hear the case Monsanto vs. Hardeman, which pertains to state glyphosate health warnings. The statement read: “We are disappointed the Supreme Court has decided not to hear this case, which has significant implications for our global food supply and science-based regulation. …

Ag Groups Want Glyphosate Case Heard

Jim Rogers Legal, Pesticides

A total of 54 agricultural organizations have voiced concern regarding the possibility of a detrimental precedent being set. A letter was sent to President Joe Biden outlining concerns related to an amicus brief that was recently submitted to the U.S. Supreme Court (SCOTUS). In the brief, Solicitor General Elizabeth Prelogar advises SCOTUS against hearing a case related to glyphosate and …

Changes in Pesticide Residue Tolerances on Citrus Destined for Korea

Jim Rogers Export, Pesticides, Tip of the Week

By Mark A. Ritenour The U.S. and other countries set maximum residue limits (MRLs) on fresh produce for various chemicals, including pesticides that might be used preharvest or postharvest. These materials must be labeled for use on the crop of interest and used only according to label instructions. While it is unlikely for U.S. MRLs to be exceeded when label …

citrus greening

Representatives Ask for HLB Pesticide Approval

Jim Rogers Legislative, Pesticides

U.S. Representatives Kat Cammack and Al Lawson led members of the Florida congressional delegation to ask the U.S. Environmental Protection Agency (EPA) for expeditious approval of Vismax, a biochemical pesticide for HLB. A letter from the representatives asks the EPA to rapidly approve the use of Vismax in preventing HLB so the industry may access this product before the start …

How Weather Affects Pesticide Applications

Jim Rogers CEU, Pesticides, Weather

By Matt Smith Editor’s note: This article grants one continuing education unit (CEU) in the Core category toward the renewal of a Florida Department of Agriculture and Consumer Services restricted-use pesticide license when the accompanying test is submitted and approved. Weather affects what pests you might be spraying for and the worker doing the spraying. There are environmental safety risks …

Sneak Peek: May 2022 Citrus Industry

Jim Rogers HLB Management, Pesticides, Sneak Peek

While many citrus growers use similar strategies to cope with HLB, no two approaches are exactly the same. One grower who uses a very different method to manage citrus greening is Chip Henry. In the May cover story of Citrus Industry magazine, he tells how growing organically has helped him successfully fight the disease. Sometimes, production practices aimed at protecting …


Integration of Nutrition and Crop Protection Products

Jim Rogers Nutrition, Pesticides, Research

By Davie Kadyampakeni and Evan Johnson In the era of citrus greening disease (huanglongbing, HLB), maintaining optimal nutrition and disease/pest management strategies is critical for avoiding adverse effects on tree performance. Use of the right fertilization rate, timing and placement are important for optimal citrus production. In a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) research study, …

Guidance on Chlorpyrifos Recordkeeping

Jim Rogers Agriculture, Pesticides, Tip of the Week

By Brett Bultemeier and Lauren Diepenbrock The revocation of chlorpyrifos residues and tolerances that became effective on Feb. 28, 2022, caused some confusion and concern when it was first announced. The legal description provided by the Environmental Protection Agency is challenging to fully understand. Therefore, the Pesticide Information Office from the University of Florida Institute of Food and Agricultural Sciences …

Ag Associations Seek to Block Chlorpyrifos Ban

Tacy Callies Citrus, Legal, Pesticides

Several agricultural associations filed suit in federal court Feb. 10 seeking to block the Environmental Protection Agency (EPA) from prohibiting the use of the pesticide chlorpyrifos on food crops beginning Feb. 28. The Georgia Fruit & Vegetable Growers Association is among those seeking the action. According to the American Soybean Association, which is one of those suing, the agricultural associations …

citrus nutrition

Reducing Psyllid Populations During Key Periods Pays Dividends

Jim Rogers HLB Management, Pesticides, Pests

By Lukasz L. Stelinskiand Jawwad A. Qureshi Asian citrus psyllids (ACP) are at the mercy of their host (citrus) for survival. They need flush to lay eggs and for the nymphs to develop. Prior to HLB, the majority of flushing had been fairly predictable and occurred in the early spring and late summer. The occurrence of flush in young trees …

Smart Technology Cuts Spray Costs

Jim Rogers Pesticides, Technology

As they battle HLB, growers must control costs wherever possible, including by applying pesticides and fertilizer more efficiently. With that in mind, Yiannis Ampatzidis is engaging artificial intelligence (AI) to develop a low-cost, smart tree-crop sprayer that can automatically detect citrus trees, calculate their height and leaf density, and count fruit. That way, growers target their spray more efficiently, so …

EU Ban of Pesticides Could Impact U.S. Growers

Jim Rogers Pesticides

By Frank Giles Mike Aerts, Florida Fruit & Vegetable Association’s vice president of science and regulatory affairs, recently shared an update from the European Union (EU) that could impact maximum residue limits (MRLs) allowed in the 27-member-country body. MRLs govern the amount of allowable pesticide residue on a food product in order to enter a country. Because the EU has …

Florida orange

Chlorpyrifos Update: Ban Not in Effect Yet for Citrus

Ernie Neff Pesticides, Regulation

An update on the use of the insecticide chlorpyrifos in Florida citrus was provided in the November 2021 issue of Citrus from the Ridge to the Valley, the Central Florida citrus Extension newsletter. In August, the Environmental Protection Agency (EPA) announced it will stop the use of the insecticide on all food. Excerpts from the Extension newsletter’s discussion about the …

EPA Bans Chlorpyrifos on Food

Ernie Neff Pesticides

The U.S. Environmental Protection Agency (EPA) announced it will stop the use of the pesticide chlorpyrifos on all food. It said it is taking the action to better protect human health, particularly that of children and farmworkers. In a final rule released in August, EPA is revoking all “tolerances” for chlorpyrifos. The tolerances establish an amount of a pesticide that …


Court Rejects EPA’s Aldicarb Approval

Ernie Neff Legal, Pesticides

The federal Court of Appeals in the District of Columbia on June 7 rejected the Environmental Protection Agency’s (EPA) approval of the pesticide aldicarb on Florida oranges and grapefruit, the Center for Biological Diversity reported. The ruling came in response to a lawsuit filed in March by farmworker and conservation groups after the EPA approved the use of up to …

Principles and Risks of Trunk Injection for Delivery of Crop Protection Materials

Tacy Callies Pesticides, Research

By Ute Albrecht and Leigh Archer Trunk injection is a targeted delivery of materials into the stem or trunk of trees as an alternative to spraying or soil drenching. It is practical for disease and pest management in high-value forest trees and ornamental plants where aerial applications are problematic because of environmental and human health-related concerns. Interest in using the …

Florida’s Aldicarb Decision Challenged

Tacy Callies Pesticides

Amid arguments about the troubled citrus industry and the health of farmworkers, a chemical company is challenging a state decision to block aldicarb, a pesticide that could help fight citrus greening disease. AgLogic Chemical, LLC filed an administrative challenge on May 11, about three weeks after the Florida Department of Agriculture and Consumer Services (FDACS) denied an application to use …


EPA Ordered to Act on Chlorpyrifos

Ernie Neff Pesticides

California Attorney General Rob Bonta on April 29 applauded a decision by the Ninth Circuit Court of Appeals requiring the U.S. Environmental Protection Agency (EPA) to make a required safety finding for chlorpyrifos residues detected on food. Chlorpyrifos is a widely used agricultural pesticide approved for use on more than 80 food crops. The court decision orders the EPA to …

Aldicarb Denial Disappoints Associations

Ernie Neff Pesticides

Two Florida citrus grower associations expressed disappointment over the recent Florida Department of Agriculture and Consumer Services’ (FDACS) decision to deny the use of the pesticide aldicarb in Florida citrus. “We are frustrated in the decision as we believe aldicarb will provide a powerful tool in the fight against citrus greening and can be used safely,” said Florida Citrus Mutual …