New way to deal with aphids
Preventing yield losses from soybean aphids where they pose a threat is more than a one-step process. Matt Tenhaeff, brand marketing manager for NK soybeans, says it’s a multistep process.
Staying ahead of aphids starts with selecting an aphid-resistant variety now available in Syngenta and NK genetics. Launched this year in northern states, the resistance was available in 2.1 and 2.5 maturity-level products. Tenhaeff says the resistance should be incorporated into elite group III genetics for 2011.
• NK aphid-resistant varieties in early maturities on market now.
• Seed treatment with insecticide included as part of the plan.
• Scout and spray only if aphids reach economic thresholds.
The second step involves treating the seed with Cruiser Max. This provides early-season insect protection against aphids.
Planting aphid-resistant seed and treating it with Cruiser Max still doesn’t guarantee no aphid problems, he notes. “The seed treatment delays aphids and gives soybeans an early head start,” Tenhaeff says.
The third step is doing what you can to promote beneficial insects that eat aphids. They include lacewings, ladybugs and parasitic wasps. Finally, you still need to scout.
“If aphids reach an economic threshold, you can spray,” he says. Based on their lineup, he recommends Warrior 2 foliar insecticide if an application is warranted.
“Many times you will find that you won’t need to apply an insecticide later if you follow these steps,” he concludes.
This article published in the July, 2010 edition of INDIANA PRAIRIE FARMER.