2017 U of MN Cooperative Black Cutworm Trapping Network Issue 1
Week of March 25-31, 2017
This newsletter is available in a print-friendly pdf format: 2017 Black Cutworm Network Issue 1.
This is the first black cutworm newsletter for the 2017 season.
The first 2017 black cutworm pheromone traps began operating March 25th. Figure 1 shows approximate locations where 68 traps will be located. Thanks to those that have volunteered to collect data this year. Figure 2 shows counties with traps and those reporting in March.
Each spring, the moths ride north on low level jet streams (think thunderstorms).
Last week, there were no captures of migrating black cutworm moths nor any weather systems that could have brought moths from southern states.
As always, the effect of this year's black cutworm flights into Minnesota will depend on several factors: 1) Black cutworm winter survival in the southern plains, 2) Weather systems to bring moths northward, 3) Timing of spring tillage and early spring weed density with moth flights, and 4) The crops/hybrids planted.
Spring tillage has not yet begun in most areas. We are now starting to see some winter annual and early spring emerging weeds that cutworm moths find attractive spots to lay eggs. Some growers are planning to plant corn without above-ground Bt-traits in the 2017 cropping season. This might change the potential for injury from black cutworms.
Keep tuned for more information in future issues. We are in the process of re-working the website for 2017 but should have things worked up shortly.
If you have not yet placed your traps, please do so as soon as possible.