Chlorpyrifos: the Final Chapter

Sep 07, 2021

By Bryan Jensen

This appears to be the final chapter for chlorpyrifos, the active ingredient in Lorsban and several other generic and packaged products. EPA has announced all tolerances for chlorpyrifos on food and feed will be revoked 6 months after final publication in the federal register. A tolerance is the maximum level of a pesticide that is legally allowed in or on raw agricultural commodities and process foods. Without a tolerance or exemption form a tolerance, pesticide residues in or on food is considered unsafe. To be clear, no uses of chlorpyrifos will be allow after the six-month grace period.

What does this decision mean for commodities treated with chlorpyrifos that are currently stored or crops that have been treated this current growing season and unharvested? If a residue is present as the result of a lawful application under FIFRA prior to tolerance revocation that product will be not considered adulterated.

Source : wisc.edu

Video: Root Exudates, Soil Biology, and How Plants Recruit Microbes | Field Talk Friday

Field Talk Friday | Dr. John Murphy | Root Exudates, Soil Biology, and How Plants Recruit Microbes

Most of us spend our time managing what we can see above ground—plant height, leaf color, stand counts, and yield potential. But the deeper you dig into agronomy, the more you realize that some of the most important processes driving crop performance are happening just millimeters below the surface.

In this episode of Field Talk Friday, Dr. John Murphy continues the soil biology series by diving into one of the most fascinating topics in modern agronomy: root exudates and the role they play in shaping the microbial world around plant roots.

Roots are not passive structures simply pulling nutrients out of the soil. They are active participants in the underground ecosystem. Plants constantly release compounds into the soil—sugars, amino acids, organic acids, and other molecules—that act as both energy sources and signals for soil microbes.