April, 11] INSPECTORS: QUESTIONS DISCUSSED 275 



4. Assuming that nurserymen may demand that their trees shall be treated for 

 San Jose Scale instead of being destroyed, what formula for treatment should be 

 employed? 



5. Why does fumigation with Hydrocyanic Acid gas occasionally fail? 



6. Will dipping nursery trees in lime-sulfur solution prove effective? If so, 

 should roots be immersed? 



7. What action should be taken by Horticultural Inspectors in reference to im- 

 ported bulbs, herbaceous and greenhouse plants? 



8. What progress has been made in barring wormy and scale infested fruits from 

 the markets in different staces? 



9. Is it advisable to place upon the face of each certificate the number of acrea 

 represented? 



10. Should not inspection of imported stock be made at ports of entry into this 

 country, under federal supervision? 



11. What is the best means within our reach to make sure that railroad companies 

 are observing the law regarding the transportation of nursery stock without inspection 

 certificate? 



12. What is the present status of Crown Gall on Apple? 



a. Relation of Crown Gall and Hairy Root. 



b. Prevention of thi-s disease in the nursery. 



c. Inspection and requirements for Crown Gall. 



d. Contagiousness. 



The meeting stood adjourned at 5 p. m., Friday, December 30. 



Another Breeding-place for the House-fly. — The material in which the House-fly 

 is known to breed in greatest numbers is fresh horse-manure. But there are other 

 substances which offer conditions of temperature and moisture that are as favorable, 

 if not more so, and their scarcity alone prevents them being more than local factors 

 in considering the control of this pest. 



The writer made some observations on the breeding habits of the House-fly during 

 September and October of 1910. Large amounts of alfalfa ensilage were being fed 

 at the Kansas State Agricultural College dairy and what was not eaten by the cows 

 was removed from the manger when cleaning the barn each day, and thrown into a 

 manure spreader where it was left until a load had accumulated. Flies collected upon 

 this waste ensilage in large numbers, and upon examination large masses of eggs — 

 hundreds in a cluster — were found from one to two inches below the surface of the 

 heap. A number of flies that were coming ;ip from among the pieces of ensilage were 

 caught, and they proved to be Musca domesiica. 



At first it was believed that the flies were attracted to the ensilage because it had 

 been used as bedding and had become soaked with urine; but both eggs and maggots 

 were found on chunks left in the manger from the last feeding. This led to an exam- 

 ination of the ensilage in the silo. Here the adult flies were numerous, and all stages 

 of their life history were present. A handful of ensilage that the men in charge pro- 

 nounced in excellent feeding condition was found to contain eggs and young larviE. 

 At the sides of the silo where decomposition had gone farther and the suifacc layers 

 had not been removed so rapidly, grown larvae and pupa were found. 



Francis B. Milliken, B. S., 

 Assistant Entomologist, Kansas State Experiment Station. 



