Peanut insect pest update

The peanut crop has responded to the recent rains and in some fields rows are already nearly ‘touching the middles’. The ‘old-timers’ used to say that the best yields occurred in years when plants ‘shook hands’ by the 4th of July. In that regard, things look very promising. We are seeing an increase in potato leafhopper populations with untreated fields reaching 5-10% hopper burned leaves. Our recommendations for hopper management are to scout field prior to any planned fungicide applications (e.g., for leaf spot) and tank mix an insecticide if plants are approaching 25% hopper burn and hoppers are still active. Automatic sprays may or may not have value. It is easy to check fields for hopper and make those tank mix applications IF NEEDED. Unnecessary insecticide applications are never good, as they waste money and kill beneficial insects that can help suppress future pests by eating their eggs and immatures (e.g., corn earworm). We are also getting some calls about the need for Lorsban 15G applications for soil insects, especially southern corn rootworm. Wet years favor rootworm populations, as the eggs and larvae require high levels of soil moisture to survive. But even in a wetter summer, we have seen little value for Lorsban applications in the sandiest fields. We recommend confining Lorsban to fields with heavier soils and those with a history of rootworm damage.

Leave a Reply