Whitefly – especially Bemisa whitefly – are STILL one of the hardest insects to control with pesticides in the greenhouse industry,
Efficacy trials are key to keeping growers informed about which chemicals currently work and which don’t for Bemisia whitefly.
Entomologists at the University of Maryland and Delaware recently did such a study, and included newer pesticide registrations. If you missed the article in the July issue of Grower Talks magazine, keep reading for the link to their results and a Canadian take on the study.
Continue reading “Which Pesticides are Effective for Whitefly?”
Changes will soon be coming to some of the chemical products you rely on most.
It seems there is never a dull moment in the greenhouse ornamental industry these days. From transitions to new crops, new export requirements, to novel pest problems, the industry has seen a lot of change….and it’s not over yet.
The industry is also going to be facing changes regarding some commonly used chemical products. Here is the latest on potential revisions to the list of chemical tools we have access to in Canadian floriculture.
This is guest post was written by Cary Gates, Pest Management Director at Flowers Canada Growers.
Continue reading “The New Era of Pesticides in Canada: Cancellations, Re-evaluations, and New Products”
That’s right! As of today, flower growers have 2 new weapons against fungal diseases at their disposal. Heritage MAXX (azoxystrobin) and Medallion (fludioxonil) are now registered for use in outdoor and greenhouse ornamentals.
Impatiens showing signs of nutritional deficiency due to Pythium root rot infection. Heritage MAXX is now available for Pythium control in greenhouse ornamentals.
Heritage (a Group 11 fungicide) is a systemic fungicide, and is appropriate for control of Pythium, Grey mould (aka Botrytis blight) and Rhizoctonia. It can also be used for foliar diseases such as Powdery Mildew, Downy mildew, Rust, Anthracnose and Alternaria Leaf Spots. You can find the new label here: HeritageLABEL2016.
Medallion (a Group 12 fungicide) is a contact fungicide, and is appropriate for control of root rots such as Fusarium, Rhizoctonia, and Black Root Rot (Thielaviopsis) when applied as a drench. It can be applied foliarly for Grey Mould, Anthracnose Leaf Spot and Rhizoctonia Stem Rot. MedallionLABEL2016.
Medallion fungicide is now available to Canadian ornamental growers to help control diseases like Alternaria leaf spot (shown here on impatiens).
Both are broad-spectrum fungicides that can be used curatively or prophylactically.
As with any chemical control product, make sure to read and follow the label carefully prior to use.
(Also, 1000 points each to the team that helped push these label expansions forward:Cary Gates, Flowers Canada; Jim Chaput, OMAFRA; Jennifer Llewellyn, OMAFRA and Graeme Murphy, formerly of OMAFRA).