I’ve been asked what growers need to do with Lorsban they did not use in 2021. In some cases when a product is discontinued there is what could be considered a grace period in that product in the hands of farmers can be used in the future until it is depleted. That is not the case with Lorsban. Although the dates are somewhat unclear (the start of the six-month clock, see previous note,) when the six months come to an end food crops (in this case peanuts) cannot enter commerce. The take-home message as I see it is that if you bought up Lorsban and/or have any remaining on your farm, it should be taken back to the distributor to keep you from incurring an economic loss or have it around on the farm where it could be a hazard. You will not be able to use those stocks on the 2022 peanut crop and sell those peanuts.
Chlorpyrifos, Stocks of Lorsban in Grower's Hands Peanut Notes No. 190 2021
(Updated: Aug. 25, 2021, 5:16 p.m.)