14 



the blossoms fall, are recommended. Aphis pomi {mali) and Eriosoma ; 

 {Schizoneura) lanigeruni were abundant. Le2ndosaphes uhni (oyster- 

 shell scale) appeared in increasing numbers and was abundant on i 

 birch, poplar and walnut. Lygidea mendax, E-eut. (false apple red-bug) 

 occurred in various orchards in New Brunswick. Epitrix CMCMmem,Harr. 

 (potato flea-beetle) was the most serious pest of the year, attacking 

 both first and second crops of potatoes. Other injurious insects 

 recorded were :• — -The Scarabaeid, Macrodactylus subspinosus, F. 

 (rose-bug), May beetles, Anthonomus signatus, Say (strawberry weevil), 

 Pissodes strobi, Peck (white pine weevil), Scolytus quadrispinosus, Say 

 (hickory bark beetle), the weevil, Eucactopliagus graphipterus, 

 Champion, Cirphis {Leucania) unipuncta, Haw. (army worm), 

 Malacosoma americana, F. (apple-tree tent caterpillar), Eriopus 

 Horidensis, Guen. (Florida fern caterpillar), Iridotnyrmex humilis, Mayr 

 (Argentine ant), the Cecidomyid, Lasioptera vitis and the Syrphid, 

 Merodon equesiris, L. (narcissus fly). 



Experiments against the peach borer [Aegeria exitiosa] showed that 

 soft asphaltum gave the best results, because it withstood the weather 

 for a complete season and allowed borers to penetrate only below its 

 lower edge. Observations on combining nicotine with ordinary 

 spraying mixtures showed that nicotine preparations can be added to 

 lead arsenate, Bordeaux mixture, etc., without the formation of a 

 serious precipitate and without any apparent detriment to the nicotine. 

 Work on potato spraying and dusting against Epitrix cucumeris was 

 continued during the year. 



LoYER (N.). Boite k raisin. [A protective cover for growing grapes.] 

 ■ — Bull. Soc. Nat. Acdimat., Paris, Ixii, no. 8, August 1915, 

 pp. 250-253, 3 figs. 



Instead of paper bags, M. Debreuil has for the past 20 years used a 

 cylindrical box of wire gauze for the purpose of protecting growing 

 grapes. The construction of these cages is described. Each cage costs 

 about 2\d., and besides being lasting, it favours the perfect ripening 

 of the fruit far better than a paper bag. A wire fastened to one of the 

 wooden strips which form the opening of the box, enables the cage 

 to be suspended so as not to press on the grapes. 



d'HERELLE (M. F.). Sur le Proc6d6 biologique de Destruction des 

 Sauterelles. [The biological method for the destruction of Locusts.] 

 — C. R. hebdom. Acad. Sci., Paris, clxi, no. 17, 26th October 1915, 

 pp. 503-505. 



The control of locusts and grasshoppers by means of Coccobacillus 

 acridiorum has been successful in Mexico in 1910 and in Tunis in 1915. 

 The virulence of the Coccobacillus decreases rapidly in cultures and the 

 use of a virus insufficiently exalted may give results which are opposed 

 to those desired. The exaltation of the virulence may be produced by 

 passage through a series of locusts. In Schistocercu, in which incubation 

 only lasts a month, this can be done by using adults which have just 

 deposited eggs and the inoculation of young forms can be effected 

 at the time of hatching. In Dociostaurus (Stauronotus), in which 

 incubation lasts 8 or 9 months, adults cannot be used, and the young 



