Aphicide Awareness: Reports of Phytotoxicity on Ornamentals
After my previous post outlining how Ontario growers may be experiencing resistance to Beleaf (flonicamid), several growers are experimenting with alternate aphicides (chemicals that control aphids) this spring. These growers tested products on small batches of crops at high rates, to look for phytotoxicity , and have passed on their results to share with the rest of you. Keep reading to see which products are affecting which crops, and how you can help mitigate issues with phytotoxicity from insecticides. Phytotoxicity: The Usual Suspects and Typical Symptoms For anyone that grows plants commercially, you’re well aware that pesticides, plant growth regulators, and fertilizers can all sometimes cause unwanted effects or damage to crops (phytotoxicity). Products used for greenhouse sanitation, such as those used to clean biofilm from water lines, can also be a source of unexpected phytotoxicity (or “phyto”), if used incorrectly. Classic leaf margin burn on Cyclamen from phytot...