i:o. 7. DEPARTMENT OF AGRICULTURE. 303 



be cured except to have your trees as vigorous as they can be. It 

 attacks only those trees which are already becoming worthless. 



MR. DRAKE: Will the same rule for treatment of soil for the 

 cutworm apply for the wireworm? 



PROF. SURFACE: This is the hardest insect to treat with 

 either remedies or preventives, but the same method is to be recom- 

 mended for it. It can be killed by slicing potatoes, poisoning these 

 slices with Paris green, and dropping them on the ground infested 

 with the pests. Keep your live stock away from these potatoes. 



QUESTION: "What is the cause of apple trees turning yellow in 

 July and falling off? Remedy for same?" 



Answer : It is simply a symptom of a condition. A yellow 

 leaf means an unhealthy condition of the tree, perhaps due to im- 

 proper nutriment, fungi, blight or insects. It should be seen by 

 an expert or the details should be more fully given. 



MR. D. H. WATTS: As an insecticide, what is the chief differ- 

 ence in eflSciency between Dalmation and Persian powder? 



PROF. SURFACE: I believe Dalmation powder to be very ef- 

 ficient. Persian powder is never good unless fresh. 



DR. FUNK: Is it not the root worm that burrows? 



PROF. SURFACE: I never knew the green cabbage worm to 

 burrow into the head, but a species of moth larva does so. 



MR. RODGERS: Is there a preventive for the green cabbage 

 worm? 



PROF. SURFACE: All extensive cabbage growers are using 

 Paris green with success. I should recommend it without hesita- 

 tion until the heads are three-fourths grown. There are several 

 broods during the year. Kill the early broods and the late broods 

 will not be present. It may be used in a solution of one ounce to 

 ten gallons of water, or as a dust, one part to forty parts of lime. 



MR. RODGERS: Will not the Paris green injure stock? 



PROF. SURFACE: If the stock get very much it might, but they 

 could hardly get enough, as the Paris green does not stick to the 

 cabbage. 



Meeting adjourned. 



State College, Pa., 2.30 P. M., Thursday, Oct. 13, 1904. 

 J. A. Herr, Chairman. 



The CHAIRMAN: I am advised by Secretary Martin that the 

 sessions for the afternoon will all be held in this room — both sec- 

 tions. We will first be favored with a piano solo by Miss Helen 

 Atherton of State College. 



