Northern Corn Rootworm
rootworm is the most common species found on corn. While adult Diabrotica barberi can feed on a variety of plants, their larvae survive exclusively on the roots [...] green in colour. They appear in late July and remain in corn fields until first frost. Females lay their tiny, white eggs in the soil at the base of corn [...] feed on the foliage, pollen, silks and developing kernels of corn, with the following consequences: When corn silks are cut all the way back to the ear