188 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 14 



prove. If Nurseryman Ra}^ had to account to his State Inspector for 

 each tag received, and the misuses of a certificate was prohibited under 

 penalty of the law, he would refuse to give Al^r. Brown a certificate tag. 



Six years ago Florida had a disasterous experience which made the 

 inherent weakness of the ordinary nursery inspection system very 

 apparent. We have developed a system which overcomes this weakness. 

 It has worked successfully for five years. 



The time has come when nursery^ inspection requirements should be 

 standardized to eliminate the many needless confusing and unimportant 

 variations. We owe this to the nurserymen, the horticulturists and 

 ourselves. The numbered certificate plan should be adopted as a 

 standard requirem_ent. The Nursery Inspector who ignores it is assum- 

 ing a grave responsibility. 



Chairman Sanders: The next paper is by H. F. Dietz. 



SOME PROBLEMS IN GREENHOUSE INSPECTION WORK 



IN INDIANA 



By Harry F. Dietz, Department of Conservation, Indianapolis'- 



The total value of the greenhouses of the United States is between 

 $75,000,000 and -1100,000,000. In Indiana alone there are 4,500,000 

 square feet of ground covered by greenhouses conservatively valued at 

 $5,000,000. Our State ranks seventh among the commercial flower- 

 growing states of the Union, being surpassed only by New York, 

 Pennsylvania, New Jersey, Illinois, Massachusetts, and Ohio. Little 

 thorough work relating to the life history and control of the most com- 

 mon and destructive of these insect pests or plant diseases has been 

 done. The florists have been left largely to shift for themselves and to 

 devise control methods good, bad, and indifferent. Generally only in 

 cases where the destruction of an entire crop has been threatened, 

 through the spread of a serious pest such as the chrysanthemum midge, 

 have entomologists as a whole aided the florists. 



The problems arising in the inspection and certification of greenhouse 

 plants for intra and inter state shipment have not been given the careful 

 and thorough consideration they deserve. The writer does not presume 

 to say how these problems should be dealt with, but will point out and 

 illustrate by specific cases, the problem.s that have arisen in Indiana in 

 order to awaken an interest in the matter. 



^Published with the permission of the Director of the Department of Conservation 

 and the Chief of the Division of Entomology. 



