Notes on the Locust Leaf Miner, Chalepus dorsalis Thunb.

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Abstract
Black locust trees, Robinia pseudoacacia, are severely injured year after year in certain sections in the central Atlantic states by the locust leaf miner, C. dorsalis. Injury to the foliage is caused by the feeding of the larvae and the adults. The insects hibernate as adults. They emerge early in May and feed on the tender foliage. Eggs were numerous by June 5. The larvae feed on the parenchyma cells, forming a mine which can be seen from either side of the leaf. In 1937 only 1 brood developed at Blacks-burg, Virginia. The life cycle was 31-43 days in length. 2 applications of Pb arsenate applied early prevented feeding and oviposition by the adults.

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