1890.] PUBLIC DOCUMENT — No. 4. 65 



vineyardist in our State has tried it repeatedly, and he re- 

 gards it as a very excellent application, put on in the fall. 

 There is quite an acrid character to it that seems prejudicial 

 to growth ; but, if applied moderately in the fall of the year, 

 I think it will prevent the breeding of spores, and that the 

 fruit will be better the succeeding year. 



Secretary Sessions. Is it your pleasure to take note of 

 the few questions that we have here, or do you wish to 

 pursue the subject of market gardening still further? 



In response to this question, there was a general call from 

 the audience for " Questions." 



Secretary Sessions. The first question is, " How can we 

 rid our cucumbers, grown under glass, of lice?" I will call 

 on Mr. Rawson to answer. 



Mr. Raw^son. I cannot answer the question. I cannot 

 do it myself, and therefore I cannot tell anybody else how 

 to do it. I can get rid of them in hot-beds, but under glass 

 I have not been able to do it. If there are any lice on them 

 when they are put under glass, they wnll be pretty sure to 

 stay there. The method of getting rid of them in a house 

 is by very moderate smoking. We cannot smoke a house 

 so strongly as we do for lettuce, because we would destroy 

 the leaves and also destroy the cucumbers. 



Secretary Sessions. Mr. Wood of West Newton can 

 tell us something about boiling sulphur, which perhaps 

 might apply here. 



Mr. Wood. If you ask that question with regard to 

 keeping cucumbers free from vermin, I do not know that 

 it has ever been attempted. I have used sulphur for the 

 destruction of vermin under glass, more especially in the 

 grapery, where I have had serious trouble with the red 

 spider. It is well known that sulphur is the very best 

 antidote for that insect, and at the same time it is a pre- 

 ventive of mildew. Those are the two troubles which we 

 have had with our grapes grown under glass. I have also 

 found it successful in destroying the thrip. I do not think 

 it would be effectual in destroying the black or green aphis ; 

 but I have not had any difficulty in destroying them upon 

 cucumbers by the use of tobacco. The cucumber plant will 

 not stand so severe fumigation as some other plants, but 



