306 



parasite known at present. Spraying with lime-sulphur wash is an 

 effective remedial measure, but it frequently cannot be applied to 

 large shade-trees and it will also damage paint on neighbouring 

 buildings, so that its use is often impracticable. The only other 

 satisfactory method of procedure is to cut down infested trees and 

 replace them with others not susceptible to the pest. Poplars are 

 especially objectionable because the scale multiphes rapidly upon 

 them ; they are too high to spray, and too hardy to die, so that they 

 serve as disseminating centres for the scale for many years. 



Marlatt (C. L.). Report on Federal Plant Quarantine Work and 

 Co-operation with State Officials. — Jl. Econ. Entom., Concord, 

 N. H., xiii, no. 2, April 1920, pp. 179-180. 



A brief resume is given of this report, many of the facts in which 

 have chiefly been taken from one already noticed [R.A.E.. A, viii, 

 234]. The enormous growth of the scope of the Federal Horticultural 

 Board is emphasised, together with the need of support from every 

 State official and worker against reactionary propaganda such as that 

 which has been spread broadcast respecting quarantine no. 37. 

 [R.A.E., A, vii, 184.] 



-Sasscer (E. R.). Important Foreign Insect Pests collected on 

 imported Nursery Stoclt in 1919. — Jl. Econ. Entom.. Concord. 

 N. H., xiii, no. 2, April 1920, pp. 181-184. 



The amount of stock exported from the principal countries to the 

 United States was less in 1919 than in any year since 1912, but, in 

 spite of this, the number of insects arriving on imported stock has 

 been as large as ever, if not larger. Even if stock had been examined 

 by recognised experts on the other side, there was seldom if ever a 

 shipment of any size that did not show insects of some description 

 when examined in the United States, and an insect of no importance 

 in its own country may easily change its habits in a new environment. 



The insects intercepted in 1919 included : — Platyedra (Pectinophora) 

 f]ossi/'piella, Saund. (pink boll worm), in cotton seed from China, Africa 

 (Angola) and Mexico ; Palaeopus coslicollis, Mshl. {dioscoreae, Pierce), in 

 yams from Jamaica ; Etiscepes batatae, Waterh., in sweet potatoes from 

 British West Indies ; E. porcellus, Boh., on sweet potato cuttings 

 from Hawaii ; larvae of presumably Anastrepha fraterculus, Wied., 

 in grape-fruit and mangos from Cuba, Guatemala and Jamaica ; 

 Arcfornis clirysorrhoea,\j. {Porthesia similis, ¥uess[.) (gold-tail moth) on 

 Acer atropurpureum and Azalea amoena from Holland ; Acronycta 

 rumicif!, L. (sorrel cutworm) on pear and quince from France ; nests 

 of Nygmia phaeorrJioea, Don. {Euproctis chrysorrhoea) (brown-tail 

 moth) on Cotoneaster, apple and manetti stock from France ; egg- 

 masses of Porthetria dispar, L. (gipsy moth) on quince, apple and 

 manetti stocks from France, and on boxwood from Holland ; Agonop- 

 leryx ocellana, F., on rhododendrons and boxwood from Holland ; 

 Gracilaria zachrysa, Meyr., on azaleas from Holland and Belgium ; 

 a species of Reticulitermes in packing-moss round roots of Utchi and 

 citrus from the Phihppines ; a species of Melanotus in ship's ballast 

 from Spain ; Athous niger, L., in soil round rhododendrons from 

 Holland ; a species of Crambus in rice-straw packing from Japan ; 



