I’ve been getting asked this a lot over the last few weeks so I thought I had better finally write a quick blog on it. What is this insect? It’s a red-headed flea beetle. Very common in soybeans but even more abundant this year, showing up in other crops too. Defoliation in corn is not a concern and in soybeans, just follow the defoliation thresholds already established. I highly doubt populations will get high enough to need to spray in soybeans but in certain fields where dry conditions persist, defoliation may reach threshold. For thresholds and defoliation charts, see the OMAFRA Pub 811, Agronomy Guide for Field Crops or click here.
Written by Tracey Baute
Areas of Focus • Collaborate on applied research and demonstration projects to validate/determine practical integrated insect management solutions • Monitor for and implement strategies for new invasive species • Co-developer of the Aphid Advisor App • Co-author of Publication 812, Field Crop Protection Guide