Gypsy Moth

k-1 The gypsy moth was accidentally introduced into this country in 1869, and, since then, it has damaged millions of dollars worth of trees in the Northeastern States. Burning the caterpillars in brushland with a cyclone burner was a control measure used 66 years ago. A pump was mounted on a 15-gallon tank, which was filled with crude oil.
Another method for controlling the gypsy moth was to band trees with strips of folded burlap. As the caterpillars crawled up the trees, they became trapped beneath the layers of burlap. This operation was time consuming, requiring teams of inspectors to check the trees and destroy trapped caterpillars. It was successfully used however with other control measures to retard the westward spread of this serious forest pest. k-2
k-3 First attempts to control the gypsy moth with sprays proved cumbersome and uneconomical. In some areas several miles of hose were required to reach into infested areas. Excessive amounts of spray were needed per acre.
For many years areas infested by the gypsy moth have been under Federal quarantine, and cooperative control measures have been carried out by local, State, and Federal agencies. Since 1946 DDT has been used against the gypsy moth--1/2 to 1 pound mixed with 1 gallon of fuel oil and applied at that rate to the acre. It has meant sure death to the gypsy moth but not to most other forest insect fauna and to birds and mammals. Large forested areas now are usually sprayed from aircraft. This C-47 can spray in one hour an area that formerly would take nine hydraulic units a whole season. Control methods promise the eventual eradication of the gypsy moth from the United States. k-4


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