When is sorghum most susceptible to corn earworm attack?

Sorghum is most susceptible to corn earworm attack during the two weeks following pollination. This time frame is critical because the developing kernels are vulnerable, and the corn earworm is particularly drawn to the sweet and tender grains as they form. The larvae feed on the kernels, which can lead to significant yield losses.

During this post-pollination phase, the plant's defenses are often down, making it an ideal target for pests. Furthermore, the nutrients and energy are being redirected toward kernel development, which means there is less vigor to naturally repel insect pests. While other life stages or environmental factors may attract pests, the combination of growth and nutritional vulnerability immediately after pollination creates an optimal situation for corn earworm attacks.