FOUR IMPORTANT INSECTICIDES. 141 



Mr, : Why not try gas lime ? 



Prof. Cook : A good idea. Try it, sprinkling on the hills. 



Mr. Lewis : Would salt and ashes do any good? 



Prof. Cook: Not for cut worms. 



Mr. : What will kill pear slugs ? 



Prof. Cook : Kerosene emulsion is perfectly sure. 



Mr. : How about currant worm ? 



Prof. Cook : Powdered white hellebore is a sure thing. 



Mr. : How about curculio ? 



Prof. Cook : Judge Ramsdell says the curculio is a benefit to plum men, as 

 when plums are plenty they thin them out, and other times they help the price. 

 Soak rags with carbolic acid and tie around the tree and it will kill the tree 

 and not hurt the curculio. Paris green, kerosene emulsion, and other poisons 

 are of no avail against the curculio. He will not eat them. They begin to 

 work when the crown falls from the plum. Then early in morning or late in 

 the afternoon, put a sheet under the tree and jar the tree, the insects will fall 

 and you can gather and kill them. Use a padded mallet and the weevils will, 

 fall on sheet. They look exactly like buds. Keep this going till July 4. 



Mr. : Do you do this every night ? 



Prof. Cook : No, try every little while, and as often as you get curculio keep 

 on every night. 



Prof. Beal : For 50 trees it costs about G cents per tree. 



Query : What fruits do they affect ? 



Prof. Cook : Plum, cherry, apple, peach. The i>apers say jjut cotton batting 

 around tree. It will do no good ; they fly excellently. 



Mr. : A new worm is working in my apples this year that does not go 



to the core but burrows all around through the substance. 



Prof. Cook: That is the apple maggot. They can only be killed by feeding 

 to hogs or cattle. 



Mr. : Can you circumvent the coddling moth? 



Mr. Cook : Certainly. By spraying the trees late in May with a well-stirred 

 mixture of one pound of Paris green and fifty gallons of water; and by this 

 same process you will also kill off the leaf-rollers, canker worms and tent cater- 

 pillars. 



Mr. : What does kerosene emulsion do for the peach borer? 



Prof. Cook: A great deal of good, i. e., for the tree. It might be entirely 

 effectual A man told me it was no good. I found that he applied it in 

 September and March. He should have done it July 4 and July 25. Bat for 

 the peach borer there is nothing so good as digging out and pinching. 



Mr. : What is best for the Colorado beetle ? 



Prof. Cook: Paris green or London purple. For early crop mix in flour 

 one-tenth and use on melons and cucumbers, sprinkle on as little as you can. 

 This for when plants first appear. When large use 1 to 50. 



Prof. Bailey: I wish to emphasize the fact that the only way to treat the 

 peach borer is to dig him out. I have known acres of trees ruined. In our 

 neighborhood the fruit growers united in a crusade against this beetle and 

 cleaned him out of the region so that now they are rarely found there. 



