SOME INSECTS OF THE YEAR IN GEORGIA. 79 



mainly conducted by Harper Dean, jr., field assistant entomologist, 

 and the result of the first year's work has been reported in the pro- 

 ceedings of the Georgia State Horticultural Society for 1905, The 

 work with tobacco dust was not entirely successful; other forms of 

 tobacco, alone and with kainit, also gave doubtful results. Kerosene 

 emulsion at 20 and 30 per cent was found to be the best remedy, 

 but further tests will be made before it is generally recommended. 

 We have found that kerosene emulsion may be used as a dip for the 

 roots of nursery stock without apparent injury to the trees. We 

 have controlled the aerial form in the usual way. 



The codling moth (Carpocapsa pomonella L.) has been noticed 

 more or less in all apple orchards. In the best apple orchards of 

 Georgia proper spraying methods are followed, and this insect re- 

 duced to a considerable extent. 



The apple aphis (Aphis pomi L.) was present in a number of 

 orchards, and in a few cases the damage to young trees was quite 

 severe. We have found that a strong tobacco decoction is somewhat 

 superior to kerosene emulsion for controlling this insect. Much good 

 work could be done in young apple orchards during winter by find- 

 ing and removing the twigs bearing the winter eggs. 



The oyster-shell scale (Lepidosaphes ulmi L.) occurs in several 

 apple orchards, and one report this year stated that a few trees had 

 been killed at Rome, Ga. 



The apple-tree tent caterpillar (Malacosoma americana Fab.) was 

 reported from Washington, Ga., with specimens, on April 21, and 

 from caterpillars collected at Hapeville, Ga., we reared adults, which 

 emerged May 8. This caterpillar is apparently not very abundant 

 in Georgia, though appearing every year. 



Early in April the newspapers of Georgia began to report a serious 

 invasion of caterpillars in Chatham County, near Savannah. These 

 reports said that the caterpillars were present in such numbers that 

 people had to dig ditches around their homes to stop the caterpillars 

 from entering their houses, and that they got on the railroad tracks 

 so thickly that trains could not pass. We immediately investigated 

 these reports and found that the caterpillars in question were the 

 forest tent caterpillars (Malacosoma disstria Hbn.), and that they 

 were really present in alarming numbers in the swamps about 12 

 miles from Savannah. The caterpillars on April 27 had nearly 

 stripped the trees over several acres, leaving only the evergreen 

 species. The following forest trees were attacked: Oak (all spe- 

 cies), sweet gum, hickory, willow, and also plum, peach, and apple 

 trees. They did not attack the cultivated crops in the gardens, 

 except cabbage, which h?d been eaten a little in one place. It was 

 true that the caterpillars got into houses and caused much discomfort 



