174 



THE CANADIAN HORTICULTURIST. 



manure, have been the only applica- 

 tions made to the soil, and this year 

 there has been no appearance of the 

 fly. The probability is that the natural 

 enemies of this insect have increased 

 in sufficient numbers to keep it in 

 check. 



BLACK-KNOT. 



1 . Can the black-knot on the cherry 

 tree be cured ? 



2. Are there any varieties not sub- 

 ject to black-knot 1 



W. T. White. 

 Eglington. 



Reply. — 1. We doubt if black- knot 

 on either cherry or plum trees has been 

 cured. The only remedy at present 

 known is amputation as often as it 

 appears. 



2. We do not know whether there 

 are any varieties that are exempt. We 

 have not been troubled with black-knot 

 on cherry trees, hence have not had any 

 opportunity to see whether any varie- 

 ties escape. Will our readers who have 

 had experience on this point please to 

 answer this question. 



CURRANTS. 



I send some currant leaves that have 

 insects on them, and are turned red 

 wherever these insects get on the leaves. 

 What is the best remedy to use to des- 

 troy them and save the currants 1 

 Yours truly, 



W. C. Adams. 



Reply. — They are green fly. Give 

 the currant bushes a syringing on the 

 under side of the leaves with tobacco - 

 water twice a week until you get rid of 

 them. 



CELERY. 



Dear Sir, — Kindly answer in next 

 issue of Horticulturist the following 

 questions : — 



1. Do you think it necessary to have 

 celery blanched before being stored for 

 late winter use 1 



2. Would you describe a cheap root 

 house for storing celery which you 

 think would answer for this cold part 

 of Ontario. 



3. Would a root house made some- 

 thing about as follows answer : Ground 

 excavated two feet below surface, then 

 board two feet above, then on a frame 

 six feet high twelve foot boards meet 

 and slant down sides with windows, all 

 of which is banked and covered with 

 manure. 



4. Describe the most approved 

 method of keeping cabbage until late 

 in spring, either in root house or out- 

 side. 



By answering the above questions 

 you will confer a great favor upon 

 Yours truly, 



H. W. Campbell. 

 Penetanguishene, Ont., June 8th, 1886. 



Reply. — 1. It is not necessary that 

 it should be blanched when stored. It 

 will blanch afterwards. 



2 & 3. Any house that will exclude 

 frost and admit of ventilation when 

 needed, and in which you can plant the 

 celery close together and get at it as 

 required, will do. 



4. The usual method of keeping cab- 

 bage over winter outside, is that of a 

 trench wide enough to hold two heads 

 of cabbage abreast, placed in the trench 

 with the roots up, and covered with 

 earth in the form of a ridge. We have 

 not had any experience of storing them 

 in a cellar or root house, but in that 

 case would plant the roots in the earth. 



