128 STATE POMOLOGICAI, SOCIETY. 



and these lice were so plenty that they stopped the growth of 

 the scion ; and round among these httle green Hce there were a 

 great many small ants which seemed to be visiting them. I 

 would like to know, if any of you can tell me, just how to get 

 rid of them. 



Prof. Saxdersox. It is the common green aphis. I think 

 ^liss Patch, the Station entomologist, has published something, 

 on that. The ants attend the plant lice to get the honey dew 

 which is secreted by the lice. The best method of control would 

 be to spray your trees with kerosene emulsion, about lo or 15 

 per cent kerosene, or with whale oil soap, a pound of whale oil 

 soap to about five gallons of water, — just as the leaf buds are 

 opening in the spring, and if you are spraying with Bordeaux 

 mixture just as the foliage is opening, you can put your whale 

 oil soap in with the Bordeaux mixture and save the extra spray- 

 ing. The time to catch them is before the leaves get out, because 

 they curl the foliage and then you can't hit them with the spray. 



Mr. ]\IoRSE. I want to say a word on that subject. I have 

 had a lot of experience with them in the last few years. They 

 have really caused mo're trouble than anything else we have had 

 to fight. This kerosene emulsion must be a little stronger than 

 most of the Experiment Stations recommend, that is, in our 

 experience. Perhaps if we used it just as the buds were start- 

 ing it might work with one part to fifteen. I did not discover 

 that the lice were present until the leaves were out, and the lice 

 were quite well grown. I made the emulsion the same as the 

 Experiment Station tells about, i in 15, and as our trees were 

 two miles from home I went out there five or six times and 

 applied this emulsion, and it did no good. They seemed to 

 enjoy it. I kept making it stronger until I got it about i to 10 

 and that did the work. Some people recommend dipping the 

 little twigs right in the emulsion so as to be sure to get it all 

 over the lice. It will not do to use it as strong as that in that 

 way. I tried it this year. We had some trees set out, as Prof. 

 Gulley told us two years ago, in rows like corn, and I sprayed 

 it on all but one tree. I dipped the twigs on that tree and it 

 killed all the fresh grown leaves and the tree hasn't recovered 

 yet from the effects of that one dipping. But on the others it 

 killed the lice and didn't hurt the trees. 



