Bark beetle population control

It is the intent of this paper to explore the various control tactics that are being suggested in the management of bark beetles in the forest system with specific attention given to the potential impact on the predator population. Similar arguments could be extended to other bark beetle mortality agents such as the parasite community. Primary examples and control tactics discussed will be drawn from our experience with the southern pine beetle, I). frontalis, a major pest in the southeastern U.S., along with other bark beetles in North America. 

So why is DDT perceived as such a dangerous chemical In the USA DDT was used extensively after the war for the control of various insect pests. It was used in some cases in much greater quantities than it had been previously, and possibly such quantities were unnecessary. For example, i lb of DDT per acre had been sufficient to eradicate the malarial mosquito from swamps, yet in the control of the bark beetles, which carry Dutch Elm disease, 25 lb per acre were used in the USA for spraying the trees in some cases. The disease was devastating the trees, and perhaps some overkill was understandable, but this use of DDT led to effects on wildlife, with birds being noticeably affected. For example, the population... 

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