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By LYT WOOD
Covnty Forr—gr
Again in summer 1978, we have an unusually high population of locust leafminers. This is the insect that causes the apparent browning of leaves and diseased look of black locust trees.
The locust leafminer causes most of its damage when it is in its larval or "grub" stage. Leafminer larvae feed on the foliage of black locusts. Complete defoliation for several successive years will occasionally cause the death of the host trees.
I have recently noticed adult leafminers—beautiful tiny orange-and-black beetles—feeding on northern red oak leaves. When the insects are numerous, leaves will be “skeletonized.” the effect being similar to the “mines'' in locust leaves created by the larvae.
The ecology and the life histories of all insects are intricate and complex, and much is unknown. Undoubtedly, entomologists can still look forward to the pleasure of discovering many “missing links" in the life of the locust leafminer and its relationships with other animals and plants.
We do have enough information to know that the locust trees will not be ex
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