370 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



and is most abundant in the Middle and Southern States. The 

 life history lias been fully described by Dr. Riley (I.e.). 



Control. Where the plants are sprayed for the cabbage worms 

 with Paris green or arsenate of lead, there will probably be little 

 trouble with flea-beetles. Otherwise, spray with arsenate of lead, 

 3 to 5 pounds per barrel, or Paris green one-third to one-half 

 pound, adding the resin soap (see page 46) or " sticker," so as to 

 give the foliage a good thick coating, for the spray probably acts 

 fully as much as a repcllant as a remedy. AVhere injury is antici- 

 pated it will be well to dip the plants in arsenate of lead 1 pound 



FIG. 271. The striped turnip ilea- 

 beetle (Phyllotreta vittata Fab.): 

 a, larva; 6, adult greatly en- 

 larged. (After Riley, U. S. D. 

 Agr.) 



FIG. 272. The western cabbage flea- 

 beetle much enlarged. (After Riley, 

 U. S. Dept, Agr.) 



to 10 gallons of water when planting them. By thoroughly dust- 

 ing the plants with lime, land plaster, strong tobacco dust, dilute 

 pyrethrum, or any of the dusts commonly used for such insects, 

 applying the dust in the early morning while the dew is on the 

 plants, they may. be protected from attack as long as they are 

 kept thoroughly covered. It is evident that the weeds upon 

 which these pests develop in the larval stage should be destroyed. 

 Where plants are attacked in the seed-bed, screening as advised 

 for the root-maggot will prevent injury. Cloth with from 20 to 30 

 threads to the inch has proven most satisfactory for the screens, 

 which should be applied early and be made perfectly tight. 



