214 BOARD OF AGRICULTURE. 



Dr. Fisher. It costs about the same price per pound ; 

 but a pound would not go more than one-hundredth part 

 as far as a pound of Paris-green. And another thing, a great 

 deal of the hellebore is good for nothing ; and those people 

 who fail -udth it fail, perhaps, in not purchasing of honest 

 druggists. 



Mr. . Do jou consider plaster as available in en- 

 abling the potato-leaf to retain the Paris-green as flour ? In 

 my own case, I have used a cheap grade of flour; for I 

 thought the leaf of the potato retained the flour much 

 longer than plaster, especially if we had rains. 



Dr. Fisher. I think, that, if there came a heavy rain, 

 your Paris-green would pretty thoroughl}^ go off with the 

 flour, and not remain upon the potato-leaf; while the plaster 

 would be more likely to be washed off, leaving the green. 



• Mr. . I have been very well satisfied with using 



flour, because it forms a sort of paste, and sticks very well 

 indeed. 



Dr. Fisher. There is no objection to using flour at all, 

 only, if you dilute the green as thoroughly as I recommend, 

 it will be much more expensive than plaster, which is of 

 itself valuable as a fertilizer. Calcined plaster will not an- 

 swer at all. One application of green is sufficient for one 

 crop of bugs only. 



QuestiOjST. How many crops of bugs may we expect? 



Dr. Fisher. You may expect to have a crop once a 

 week, if you have good neighbors. From two to four appli- 

 cations in a season will be sufficient, unless the weather is 

 V 3ry rainy. 



Mr. Flixt. It is evident that everj^body has more or less 

 qiiestions upon this point ; and, if they are continued, it is 

 apparent that the whole forenoon will be occupied on the 

 potato-beetle. Dr. Fisher has very extensive and accurate 

 information in regard to 'a great many insects that we all 

 want to know about ; and I would suggest that it would 

 be wiser to let him finish his lecture, and then ask the 

 questions. 



Dr. Fisher. The next insect I have to notice is interest- 

 ing to gTape-growers. It is one that is not known by any 

 common name ; and therefore I must give the scientific name, 

 — the Haltica chalyhea. It is known sometimes as the steel- 



