Adama Agricultural is advising farmers to prolong fungicide efficacy by using multi-sites against septoria. Unless adequate steps are taken to protect the current armoury of fungicides, the efficacy of these products will continue to diminish, with growers left with a limited choice of crop protection options said Adama on the opening day of Crop Tec 2016.
“Growers need to be aware that unless they protect the ongoing efficacy of SDHI chemistries, they may reach a point when they can no longer rely on this technology to provide foolproof protection against Septoria,” advised Andy Bailey, Adama’s Cereal Fungicide Technical Specialist.
“With no new modes of protection arriving in the short term, and increasing regulatory pressures threatening the restriction and/or removal of many active ingredients, we would be looking at a scarcity of effective crop protection products in future years.
Growers therefore have a responsibility to protect and prolong the efficacy and lifespan of existing chemistries by utilising alternative modes of protection, namely multi-sites, to slow the rate of resistance,” he added.
Mr Bailey also warned that growers need to reduce their reliance on azoles. “Azoles still provide sure curative benefit but they are no longer fully effective in this role,” he warns. “In fact, trails have shown that the preventative effect of azoles has reduced by 20% over the last 10 years while their curative efficacy has fallen by a huge 60% or more.”
Mr Bailey advised growers to use a three-way stack of SDHI, azole and multi-site chemistries. “Stacking chemicals is recognised as the most efficient and effective method of crop protection. But it is important to ensure that the multi-site chemistry doesn’t impact on triazole uptake.
Experts from Adama were on hand throughout Crop Tec to discuss the company’s recommendations for oilseed rape canopy management and to recommend suitable herbicide options for spring sown cereals.