Sorghum and soybean aphids
July 24, 2013
Good morning. Well it’s been another couple whirlwind weeds here at Nuseed. Last week I travelled to Kearney, NE to look at Nuseed entries into Sorghum plots that were put in by UNL and Abengoa Energy. The purpose of this research is to prove that sorghum is a viable crop on the marginal non-irrigated ground in Nebraska. During our travels we looked at five different plots, both dryland and irrigated. Although when we visited it was still to early to really tell what yield will be, we were able to get good notes on plant structure, different weed control options, and a couple notes on maturity. Abengoa Energy plans on switching one of it’s NE ethonal plants to sorghum within the next five years based on the amount of water restrictions that will be put into place for irrigated corn. This is a very interesting program and I will try to keep everyone updated on its progress.
Next, it’s that time of year where you need to get out and start scouting your soybean fields for aphids. The soybean aphid overwinters in buckthorn that is usually found in woody or brushy areas. The best way to scout is to start along field margins, usually along shelter belts because they will be the first to see feeding. The first aphids will usually be clustered on the newest leaves as they seem to enjoy the younger more succulent leaves. The weather we are having right now is prime for aphids to reproduce, so a field that has low pressure may surpass the threshold within a few days. We recommend treatment at 250 aphids per plant, spraying any earlier may also take out any beneficial insects that may be in the field.
So for now keep on eye on your fields and have a great rest of your week. Next week we will talk about spraying insects in your sunflowers.