What Eats Your Corn?

Across the US corn belt, the first and foremost cluster of bugs are the corn rootworm beetles. There are basically three species of corn rootworms in Kentucky, the northern, western and southern corn rootworms. Whilst they each harm corn in much the same manner, by gnawing on the roots of the developing plant, they have a number of defined differences in their biology and operations. The adult of every one of the three species is a compact green beetle close to a quarter of an inch in size.

The grownups emerge in July and can harm corn later in the summer. The grownups will feed on the upper layer of the foliage, generally focusing destruction close to the leaf tips. Damage on leaves appears dark brown where the lower surface area of the leaf is left out. The grownups will nourish themselves on the silks if they may be existing. If this develops ahead of pollen shed, they have got the possibility to intervene with the pollination process if their quantities are huge.

Usually it has been the western corn rootworm that has made most of the financial problems to corn in Kentucky. Primarily an awfully lightweight percentage of destruction has been attached with the northern or southern rootworms. Since the western corn rootworm is mainly an infestation of continuous corn in Kentucky, the more effective and economically application to control their population is the crop rotation. Past experiences shows us that in a lot of conditions it may just take 2 to 4 years of continuous corn in an area to create an economic population of westerns. Threat of rootworm destruction by trying to keep a field in corn for 2 consecutive years is really small. Nevertheless, with far more years that the industry is retained in continuous corn the rootworm risk slowly grows. The northern corn rootworm is furthermore controlled properly in Kentucky with the rotation of crops.

In the northern states of the US, a variant of the western corn rootworm mainly feeds on soybean plants. The adult population of this species feed on soybean leaves and even lays their eggs near the soil of soybean plants. This may cause a threat to the fields especially if corn is planted the following year. This corn rootworm variant has been spreading to the east and northeast from where it was first reported but the movement southwards has been slow.

The western corn rootworm is said to produce the most damage to corn plants. Growers in Kentucky control the invasion of these pests by using crop rotation. It has been shown that it may take two to four years of continuous corn plantation in a field to gather a huge population of western rootworms. The southern rootworm on the other hand, may cause damage to the first year of corn. Aside from crop rotation, other effective treatments for corn rootworms are seed treatments, soil insecticides, and Bt corn options. Some of these treatments may target multiple pests so it is best for the grower to consider the best option.

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