652 Index. 



Plant lice — (Continued). page. 



nature of injury by 472 



on nursery stock 458 



recommendatious for repression 477 



parasitic insects affecting 480 



predaceous insects attacliing 478 



repression 477 



species prevalent in 1897 482 



nutrition, work in 15 



Pathology, Department, work in 18 



Planting and tiarvesting sugar beets 198 



sugar beets at tlae Station 589 



Pl«sniopara cubensis 345 



nature 352 



new host 433 



(See also Cucumber downy mildew.) 



Plowing under green rye to prevent potato scab 18, 418 



Plum leaf spot, number of sprayings required 208 



injury by 210 



prevalence 208 



treatment 15, 207, 211 



plant lice attacking 482 



Plums, amount of injury from leaf spot 210 



Pomona spray pump, description 219 



Popular bulletins, character 11 



Potash In fertilizers 32, 137 



sugar beets 195 



salts, influence upon composition of potato 611 



Potassium ferrocyanide test for Bordeaux mixture 228 



sulphide for prevention of gooseberry mildew SOS, 313 



oat smut 296, 300, 302 



Potato blight, early, prevention by Bordeaux mixture 378 



late, prevention by Bordeaux mixture 377 



composition, influence of potash salts .^. 611 



industry in Long Island 13 



scab, plowing under green rye to prevent 18, 418 



