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against the larvae, and applications of nicotine and soap spray were 

 therefore made on 3rd, 10th and 22nd of April, the pears beginning to 

 bloom on 22nd April. The number of applications given previous 

 to blossoming depends on the degree of infestation. 



The results of investigations into the life-history of Anarsia Imealella 

 (peach worm), which are given in detail, show that there are two gener- 

 ations of this moth in a year, adults appearing and laying eggs between 

 29th May and 19th June and again between 26th August and 

 15th September. Fruit-growers are recommended to spray in the 

 week previous to blossoming with lime-sulphur 1: 9, followed by a lead 

 arsenate, spray after blossoming. It is suggested, however, that a 

 combination of these two sprays (lime-sulphur 1 : 9, plus 2 lb. lead 

 arsenate, to 40 gals.), applied just previous to blossoming, would 

 probably prove both efficacious and more economical. This should 

 be applied to the tips of the trees with good pressure and into the 

 crotches of the finer branches. 



Otiorrkynchus ovatus (strawberry-root weevil) continues to be a 

 destructive pest [see this Review, Ser. A, v, p. 469]. Other strawberry 

 pests in British Columbia are Aegeria {SynoMhedon) ratilans (crown 

 moth), Arislotelia sp. (crown-borer), Polyphylla decemlineata (white 

 grub), Tipulids and wireworms. The life-histories and habits of these 

 are being studied ; the control suggested in the present state of 

 knowledge is the rotation of strawberries with other crops at short 

 intervals. 



Wireworms have been responsible for considerable damage to onions, 

 maize and potatoes. Baits were made by moulding baked rice, 

 shorts and water into small balls which were set in the soil 2 or 3 inches 

 deep in rows 10 by 5 feet. Various poisons were added to the baits 

 without any apparent influence on the results. After a week or ten 

 days the baits were removed from the soil, broken open and the 

 wireworms removed by hand. The balls were then remoulded and 

 re-set in the soil for another ten days. Two applications were con- 

 sidered sufficient for the year, and from 6,707 baits, 25,939 wireworms 

 were collected. This method is tedious, but would undoubtedly 

 gradually clear the land of wireworms. Sliced potatoes can similarly 

 be used as baits. 



For Hylemyia antiqua (onion maggot) the new poison-bait of sodium 

 arsenite and molasses was tried, but did not give much success. It is 

 hoped by next year to have discovered the proper tunes for application ; 

 it is thought that May and Jul}- should be the time for setting baits. 

 Thrips tabaci (onion thrips) caused considerable trojjble in onion- 

 growing districts. Soap and nicotine spraj's should be applied as soon 

 as thrips appear in numbers in the axils of the leaves ; in J 918 this was 

 about 20th June. Later applications are dependent upon weather 

 conditions ; in moist weather thrips do not multiply rapidly. Cut- 

 worms {Eaxoa messoria) were plentiful and preparations against them 

 should be made in the winter. Poison-baits should be worked into 

 the soil before the crop is planted in the spring or after the crops are 

 above ground. In spraying for Eriosoma lanigerum (woolly aphis) it 

 was found that a pressure of at least 225 lb. was necessary. Psylla 

 pyricola (pear psylla) has been recorded in British Columbia, although 

 no damage is as yet attributed to it. Other pests newly reported in 

 British Columbia are Bruchophagus funehris (alfalfa seed Chalcid), 



(C552) c2 



