DATCP 2020 insect survey update
2021
- Department of Agriculture, Trade, and Consumer Protection
Project Media
Larval populations increased from historically low levels in 2018 to 2019 but
remained extremely low overall. The state average count in 229 cornfields sampled this fall
was 0.03 borer per plant, which is only marginally higher than the all-time low average of
0.01 per plant recorded during the two preceding seasons. All three of the state’s southern
agricultural districts showed averages less than or equal to 2019 levels, while negligible
increases were noted in the central and northern areas. Larvae were absent from 90% of the
fields sampled in September and October.