FAEMEES' INSTITUTES. 97 



A voice. — Whitewash, it is said, will prevent the borer from laying its eggs. 



Levi Loomis, Ganges. — No tree can live any length of time plastered over 

 with whitewash. 



Mr. Griggsby. — I was tronbled very mnch Avith the borer, Avatched them care- 

 fully, and could not keep them out until I practiced Avhitewashing, and since 

 that have been troubled but little. I have seen no ill effects from its use. I am 

 told that in Wayne county, Ncav York, they \\?e lime in its full strength with 

 great success. 



A. S. Dyckman, South Haven. — I think I have put lime on my trees nearly 

 a quarter of an inch in thickness, and have never observed any injury. 



H. G. Buck, Hopkins. — I have been annoyed by a bug on my grape vines 

 which is represented here as the flat-headed borer. 



Prof. Cook. — It is not the flat-headed borer, but the rose-chafer. If your 

 vines were so you could shake them, you could put a sheet xmder them and cap- 

 ture the beetles. They are miserable pests. Paris green will kill them, but 

 hardly any one wants to try it. It Avould certainly kill them if sprinkled on the 

 vines Avhen in blossom, and there could hardly be any danger from bad effects. 

 HoAvever, Dr. Kedzie Avould l)e better autliority in regard to the use of Paris 

 green. 



Dr. Kedzie. — There would be no danger so far as the flesh of the grape is 

 concerned. The only danger there could possibly be is that of the Paris green 

 remaining ujion the grape and being eaten with the grape, and that would be a 

 very improbable thing. In the use of Paris green it should be borne in mind 

 that it is a very rank poison. 



Prof. Cook. — In Illinois, during the past tAvo or three years, Paris green has 

 been used Avith excellent success to stojD the ravages of the canker Avorm. 



John. B. Allen, Trowbridge. — I liaA'c found strong soap suds, apjolied to the 

 nests of tlie tent caterpillar Avith a rag tied on a stick, an excellent Avay to kill 

 them. 



C. AV. Bremen. — When is the best time in the season to catch the apple-borer? 



Prof. Cook. — The method to prevent its coming is to put soap suds on the 

 trees about the first of June. 



G. H. Bonnet, Allegan. — Will this piece of tin put on the peach tree prevent 

 the codling moth from going up the tree? 



Prof. Cook. — The codling moth is a AAanged insect, and can fly like a pigeon. 

 There is no Avay to prevent its eggs being laid, but if you would all practice put- 

 ting bands of cloth around the trees, and destroy the larvse and pupas as men- 

 tioned in the lecture, you AA^ould be Avell paid for your trouble. Keep the rough 

 bark off your trees, and your cellar AvindoAv^s closed by fine Avire gauze. The 

 Avorms in the apples hatch out into moths. On July 8th I counted nine of these 

 moths up against the A\'ire gauze of one cellar Avindow at the college. 



Mr. Blackman. — In what manner do you apply Paris green to kill the canker 

 Avorm ? 



Prof. Cook. — Put it on Avith a syringe. 



Mr. Gumming. — Did you receive some lea\'es of the Clinton grape-vine from 

 E. NcAvman of Saugatuck? He shoAA'ed us some leaA'es which were greatly 

 increased in thickness, and seemed to be filled with myriads of little flying 

 insects. No one there could tell what they Avere. 



Prof. Cook. — I ncA'er received the leaA-es, but I think, from your description, 

 I knoAv what they are. It was evidently a species of plant louse. If it had no 



