REPORT OF THE STATE ENTOMOLOGIST 1901 857 



Treatment: Spray infested trees in winter or early spring 

 with contact insecticides. 



Chief accessible article: Felt, E. P. N. Y. state mus. Bui. 46. 

 '01. p. 323-26. 



183 San Jose scale insect, Aspidiotus perniciosus 

 Comst. Principal food plants: fruit and many other trees and 

 shrubs. 



Treatment: Spray infested trees in winter or early spring 

 with whale oil soap or a mechanical emulsion of crude petroleum. 



Chief accessible articles: Lintner, J. A., state ent. 11th rep't, 

 '96. p. 200-33; Howard, L. 0., and Marlatt, C. L. U. S. dep't agric. 

 div. ent. Bui. 4, n, s. '96. p. 1-80; Lowe, V. H. N. Y. agric. exp. 

 sta. Bui. 136. '97. p. 571-602; Howard, I. 0., U. S. dep't agric. div. 

 ent. Bui. 12, n.s. '98. p. 1, 1-32; Felt, E. P., state ent. 16th rep't, 

 '00. p. 967-88; N. Y. state mus. Bui. 46. '01. p, 304-23, 336-42. 



184 Gloomy scale insect, Aspidiotus tenebricosus 

 Comst. A southern species infesting red maple. 



185 Elm Aspidiotus, Aspidiotus ulmi Johns. Princi- 

 pal food plant: elm, rarely injurious. 



186 Grapevine Aspidiotus, Aspidiotus uvae Comst. A 

 southern species infesting grapvines. 



187 Red scale insect of Florida, Chrysomphalus aoni- 

 dum Linn. Principal food plants: on palms and other green- 

 house plants. 



Treatment: Wash or spray infested plants with whale oil 

 or other soap solution. 



188 Xerophilaspis prosopidis Ckll. A southern 

 species occurring onProsopis velutina. 



189 Cactus scale insect, Diaspis calyptroid.es Costa. 

 Found on cactuses in greenhouses. 



190 Juniper scale insect, Diaspis carueli Targ. Found 

 occasionally on juniper in New York state. 



191 Peach scale insect, Diaspis pentagona Targ. A 

 dangerous subtropic species which has become established in 

 localities in the southern United States. 



192 Aulacaspis boisduvalii Sign. Found on a 

 greenhouse orchid. 



