b"Im very confident that going forward, were going to become a lotmore familiar with vegetative filter strips and how they work andhow they can fit into our production systems. TRACY SHINNERS-CARNELLEYI think this particular label [for chlorothalonil] is one thats bringing everyone's attention to it. But I also feel that this will continue to be the way of the future in terms of sustainable pesticide use practices, she says. I'm very confident that going forward, we're going to become a lot more familiar with vegetative filter strips and how they work and how they can fit into our production systems.Shinners-Carnelley says another significant label change growers need to be aware of concerns re-entry intervals for those going into a field after chlorothalonil has been applied. The required re-entry interval for scouting has gone up from two to three days, while for roguing, its 19 dayswhich Shin-Potatoes withners-Carnelley contends will be a challenge for some seed potato producers.foliar late blightMany seed growers do roguing as part of their management practices symptoms. PHOTO: TRACYduring the growing season, she says. To do this, they need to be in the field SHINNERS-CARNELLEY, PEAK OF much more frequently than every 19 days, so that is really restricting their THE MARKET ability to use chlorothalonil at particular times during the season.Shinners-Carnelley notes all of the new requirements for chlorothalonil use need to be in place for the 2020 growing season, adding its important for potato producers to carefully check the most recent label to ensure compli-ance. Growers should refer to the most up-to-date official label, which may not be the one on the chlorothalonil jug itself but is listed on the PMRA pesticide registry online.MANCOZEB DECISION EXPECTED SOONLater this summer, the PMRA is expected to release its final re-evaluation decision on mancozeb, the other Group M fungicide favoured by growers for controlling late blight and early blight.The potato industry has put a tremendous effort into providing the PMRA with detailed information on the current use patterns for the fungicide, Shin-ners-Carnelley says. Shes hopeful the final decision will include some level of continued use for potato producers in Canada.Shinners-Carnelley notes a third Group M fungicide, metiram, is no longer an option. The PMRA completed a re-evaluation of the fungicide in 2018, deeming it acceptable for use in potatoes with conditions. However, the manu-facturer decided to discontinue the product.According to Shinners-Carnelley, there is a fourth Group M fungicide permitted in potato production which isnt being utilized by the industry. Captan recently underwent a PMRA re-evaluation, and like chlorothalonil, Theperfect addition to yourits registered for a maximum of three applications per seasonincluding \x1f ground and aerial sprays. eet. All aluminum trailer inserts will transform your dry vans intoCaptan is not a fungicide that's been used in potatoes, Shinners-Car-self-unloading bulk trailers. Builtnelley says. She thinks the fact other Group M options have been a good fit for lightweight without troughs forpotatoes could be one reason why, or it might be because few in the industry maximum product capacity. are even aware captan has a potato label. Call today to see how we can help you maximize yourIf we get to the point where a PMRA decision comes back that severely product payload and reduce your transportation cost. limits the use of other Group M fungicides, something growers might want to do going forward would be to look at captan and see if it is an option that may fit into their program, Shinners-Carnelley says. 16 SPUDSMART.COM SPRING 2020"