Manitoba sunflower growers can expect to add two new products to their crop protection arsenals over the next couple of seasons.
DuPont representat ive Frances Boddy told sunflower producers at last week’s Special Crops Symposium that the fungicide Vertisan is pending approval from the PMRA, the federal regulatory body that registers farm chemicals. The product is promising control of sclerotinia in sunflower and canola crops.
The application is part of a worldwide push that involves a co-ordinated registration push for the Canadian, American and British markets. It’s a product that’s more effective and is part of an effort to reduce residue levels from farm chemicals.
“It’s a new mode of action that’s different than the existing products,” Boddy told growers. “Its active ingredient is very stable, and it’s a solid at room temperature.”
NEW MODE OF ACTION
The other key difference is the concentrated way in which the product attacks the disease.
“It’s much more active at the site of action than the older products – as much as 100 times more active in some cases,” she said.
It works to prevent plant diseases by inhibiting spore germination and hampering mycelial growth.
Boddy says the Group 7 product has also been developed with the concept of preventing resistance front and centre. The strategy includes
mixes with fungicides of different modes of action. The company is also stressing the importance of rotation programs with other modes of action as well as the use of integrated pest management programs that incorporate non-chemical cultural practices to disrupt disease activity.
As part of the registration process, the company has commissioned field trials that looked at application timing, including an early and late application as well as a sequential application that started with an early application then followed up with a later application. Boddy said the goal was to determine which most effectively controlled disease and protected yield.
“The sequential application was the clear winner – it was best in all four replications,” Boddy said. “The early application was better than the later application in all four
as well. But what the study really showed was if you get in early and then follow up with a sequential application, that will give you the best return.”
IN THE QUEUE
The product is currently in the queue for registration. The most optimistic assessment says registration may come in 2011, while a more realistic target might be the 2012 growing season.
The second product that’s in the pipeline is another fungicide, Acapela. It’s a Group 11 product and has initially been submitted for registration for cereals, corn, soybeans, pulse crops and canola, with the potential for a label expansion to sunflowers at a later date, Boddy said.
The most interesting feature of the product is the way it can move through the plant both in the xylem tissue and through vapour movement, making for better overall coverage, Boddy said.
“This is good if conditions are less than ideal in the field when you’re applying,” Boddy said. “It will give you just a bit better coverage.”
She also touted Acapela’s preventive, residual and curative properties. While it can’t reverse the damage that’s already done in field, she says field trials have shown that already established infections can be stopped dead in their tracks.
“That’s what we mean by curative – nothing can revive tissue that’s already dead,” she said.
The initial registration could come as early as 2012, Boddy said, with further label expansion applications to be determined.
“Basically, we’re saying stay tuned, more information will be available soon,” she said.
“It’sanewmodeofactionthat’s differentthantheexistingproducts. Itsactiveingredientisverystable,and it’sasolidatroomtemperature.”
– frances boddy, dupont representative