Symptoms of corn borer infestation can be easily identified by observing the damage caused to the corn plants. The most common signs include wilting and dying of the upper leaves, as well as ragged and irregular holes chewed in the newly unrolled leaves. These visible signs indicate that the corn plants have been attacked by the common stalk borer.
One of the key indicators of corn borer infestation is the occurrence of the “dead heart” phenomenon. This refers to the insect boring into the stalk of the corn plant at the soil level and tunneling upward. As a result, the affected plants show wilting and dying of the upper leaves, giving the appearance of a dead or dying central portion of the plant, hence the term “dead heart.”
When inspecting the corn plants, it is important to closely examine the lower portion of the stalk near the soil level. This is where the common stalk borer typically bores into the plant. Upon close examination, you may notice small entry holes or burrow marks, indicating the presence of the borer.
It is worth noting that the symptoms of corn borer infestation may vary depending on the stage of plant development and the severity of the infestation. In the early stages, the newly unrolled leaves may exhibit irregular holes, which can expand as the larvae continue to feed on the plant tissues. As the infestation progresses, the damage becomes more prominent, leading to wilting and dying of the upper leaves.
In my personal experience as a gardening and landscaping expert, I have encountered cases where corn borer infestations have resulted in significant damage to corn crops. The wilting and dying of the upper leaves can be quite alarming, as it indicates the potential loss of yield and productivity. Therefore, it is crucial to promptly identify and address any signs of corn borer infestation to mitigate the damage.
To summarize, the symptoms of corn borer infestation in corn plants include wilting and dying of the upper leaves, ragged and irregular holes in the newly unrolled leaves, and the occurrence of a “dead heart” where the borer tunnels into the stalk at the soil level. Close inspection of the lower portion of the stalk may reveal entry holes or burrow marks. Early detection and intervention are essential to prevent further damage and ensure the health and productivity of corn crops.
