507 



North America. Remedial measures advocated are spraying with 

 nicotine sulphate as for Aphis jpomi or A. malifoliae. Should a second 

 application be necessary, it may be made just before the blossoms 

 open so as also to be useful against the green apple bug, Lygus com- 

 munis var, novascotiensis, Knight. Experiments were made with 

 various dusts, which are apparently less efficacious than liquid sprays, 

 but definite conclusions could not be obtained owing to the advanced 

 development of insects and trees at the time of appUcation. 



European Corn Borer the most dangerous Pest to American Agriculture. 



— Wkly. Press Bull., Pennsylvania Dept. Agric, Harrisburg, iv, 

 no. 37, 18th September 1919. 



Every possible effort is being made by the State and Federal 

 Government to eradicate the European Corn Borer [Pyrausta nitbilalis]. 

 Complete destruction of the maize stalks is necessary, as the borer 

 hibernates in them. Experiments are being made with Hquid fire 

 and crushing machines for this purpose. This pest has not as yet 

 been reported from Pennsylvania, but careful watch is being maintained 

 against its introduction. 



Lyne (W. H.). Report of Inspector of Imported Fruit and Nursery 

 Stock.— 13th Ann. Kept. Dept. Agric. 1918, Victoria, B.C., 26th 

 March 1919, pp. W36-41. 



Wheat offered for entry into British Columbia from Australia was 

 found to be heavily infested with weevils, as well as Plodia sp. and 

 Tribolium sp. Owing to the large bulk of the consignments, complete 

 fumigation was impossible, but prior to shipment to England, the 

 wheat was passed through a fanning machine by which means nearly 

 all the insects were separated from the wheat and subsequently disposed 

 of by fumigation with carbon bisulphide. Wheat thus treated was 

 examined on 18th September, when no adult weevils were found, but 

 they began to appear after about four weeks, and by 31st December 588 

 individuals were recorded to the pound. Various experiments were 

 made during the year to ascertain the best method of dealing with 

 infested stored products. These included cold storage, by which means 

 all insects infesting rice were killed after an exposure of 14 days to 

 10° below freezing. Exposure to 130° F. for 3 hours gave the same 

 result, but the heat is supposed to spoil the rice for milling, as it 

 cracks the enamel. 



Pests responsible for condemnation of imported nursery stock 

 included Phylloxera on vines ; woolly aphis [Eriosoma lanigerum] 

 on apple roots ; Eriosoma pyricola attacking roots of young pear 

 trees ; codling moth [Cydia pomonella] on apples and pears ; peach 

 worm on peaches and apricots ; and Bruchids in nutmegs from 

 Singapore. Products requiring fumigation included peas and beans 

 infested with Bruchus pisorum or B. fabae ; Oriental rice infested 

 with rice weevil [Calandra oryzae], Plodia sp. and other Lepidopterous 

 larvae ; peanuts infested with Plodia ; and rabbit skins infested 

 with Dermestid beetles from Australia. 

 (C618) a2 



