THE CANADIAN HORTICULTURIST. 



173 



ling grape vines which for several years 

 bloomed most profusely, shewing large 

 and most magnificently formed clusters? 

 but no fruit appeared. Happening to be 

 in his garden one season when they 

 were in bloom, the writer was shewn 

 these beautiful clusters, and asked if he 

 could tell why they failed to set fruit. 

 An examination of the flowers revealed 

 the fact that there were no fruit bearing 

 organs present, that the ovary and pis- 

 til were not developed, hence that it 

 was impossible that fruit should ever 

 be borne by these plants. 



SLUG SHOT AS AN INSECTICIDE, &c. 



Dear Sir, — (1.) Have you had any 

 experience with slug shot as an insecti- 

 cide for apples and plums ; and is it as 

 harmless as represented, and as effec- 

 tive as Paris green 1 (2) Will the 

 Muscat Hamburgh Grape ripen in a 

 cold grapery 1 ( 3) Also i)lease say how 

 toad stools can be exterminated. 



R. 



Toronto, 23rd June, 1886. 



Reply. — (1.) We recently saw a 

 report from a State Analyst to the effect 

 that its usefulness as an insecticide was 

 due to the arsenic therein. We have 

 never used it. (2) In some seasons, 

 but seldom full flavored. (3) Apply 

 quick lime freely. 



THE ROSE LEAF HOPPER. 



Dear Sir, — Have no cure for the 

 little white insect that infests the rose 

 bushes. I have tried everything, but 

 so far without success. Could you 

 refer me to any remedy : my roses are 

 being killed out rapidly by the insects. 



I am delighted with your Canadian 

 Horticulturist. If, perhaps, had I at- 



tended to its contents a little more 

 carefully, I would not now be asking 

 for information to. destroy the lice on 

 the rose tree leaf. 



Sincerely yours, 



J. Hamer Greenwood. 

 Whitby, Ont. 



Reply. — Please see article in this 

 number on some insect enemies of the 

 rose. 



THE CABBAGE MAGGOT. 

 Is there any remedy for the maggot 

 in the roots of cabbage plants early in 

 spring 1 It does great havoc here. 

 What would a cure be worth 1 



Wm. Fleming. 

 Owen Sound, June 30th, 1886. 



Reply. — This maggot is the larva of 

 a fly resembling somewhat the common 

 house fly, and is known to entomolo- 

 gists as Anthomyia brassicse. It is 

 often very destructive to young cabbage 

 plants, sometimes ruining the crop. 

 Peter Henderson says that it is never 

 troublesome in soils abounding in shell 

 lime. If that be the case, it may be 

 that a heavy dressing of lime from lime- 

 stone would prove efficacious. English 

 authorities advise the careful pulling 

 up of all plants affected, and burning 

 them so as to destroy the maggots in 

 the plants, and the free use of quick 

 lime applied to the spot whence they 

 were taken to destroy any that might 

 be in the ground. The writer has 

 planted cabbage on the same piece of 

 ground for several yeai-s in succession. 

 In the two first seasons the fly was 

 very troublesome. A dressing of wood 

 ashes, and an abundant supply of stable 



