49 



Mr. Southwick having- invited the members of the Association to 

 inspect his spraying- outtit in Central Park, it was voted to accept his 

 invitation and to visit the park, for the purpose mentioned, at 1 p. m. 

 on June 23. 



The next paper was presented ))v Mr. Scott: 



NOTES ON COCCID^ OF GEORGIA. 



By W. M. Scott, Atlanta, Ga. 



Since March, 1898, the writer has worked the State of Georg-ia over 

 with the secondary purpose of making a collection of the scale insects 

 occurring within the bounds of the State, and the following is a list of 

 the collected species, Avith brief notes on their habits. 



(1) A-spidiotus pennciosus Comst, 



This, the San Jose scale, is without question the most important 

 species, economicall}^, that occurs in the State, and there are perhaps 

 more trees infested with it here than in any other State in the Union, 

 Our records show 1200 cases of this scale (principally commercial orch- 

 ards), involving over a half million trees (peaches and plums). This 

 does not include the garden and wayside cases, of which there are 

 hundreds in some of the lower counties. These cases are distributed 

 over 32 counties, principally in the southern part of the State, only 

 5 counties north of Macon having been found infested. Its food 

 plants in Georgia are recorded as peach, plum, apple, pear, Prunus 

 jnsmt'di'i^ rose, grape, pecan, Kilmornock willow, cottonwood, and 

 Carolina poplar. Robinson and wild-goose plums and LeConte and 

 Kieffer pears do not seem to bo congenial host plants for this insect. 

 These varieties, growing in the same orchards with other varieties 

 that were badly infested for several years, never developed more than 

 a slight infestation. In the treatment of this pest we are using 20 per 

 cent kerosene in mechanical mixture with water on orchard trees with 

 satisfactory results, and hydrocyanic-acid gas applied to nursery stock. 



Last February and March the writer made extensive experiments 

 with the use of crude petroleum as a remedy for this scale, proving 

 that 25 per cent of the crude oil gives even more satisfactory results 

 than the refined kerosene. The scales were killed when the substance 

 was thoroughly applied and no damage resulted to the trees (peaches 

 and plums). The pure crude petroleum killed peach trees, while 50 

 per cent and less did no damage. 



(2) Aspidioius forhe.si Johnson. 



This scale insect is generally distributed over the State, particularly 

 throughout middle and south Georgia. There is hardly a bearing 

 peach or plum orchard in the State entirely free from it and in a num- 

 r)878— No. 26 4 



