36 ASSOCIATION OF ECONOMIC ENTOMOLOGISTS. 



on our cranberry bogs and that, occasionally, there is so great an 

 increase as to result in actually stripping a section of bog. 



The cottony maple scale (Pulvinaria innumerabilis Rathv.), which 

 has been the theme of papers through many localities in the north- 

 western section of the State, reached its culmination in New Jersey 

 in 1905, and in 190G dropped out of sight completely in those places 

 where it had been most abundant the year before. It was a curious 

 repetition of an experience about eight years ago, although the agent 

 of control this time was apparently different. Mr. E. L. Dickerson's 

 paper covers that ground fully and it needs only a mere mention here. 



The elm leaf -beetle {Galerucella luteola Mull.) also, after a period 

 of two years during which no spraying was required at New Bruns- 

 wick, has taken a new start, and in 1906 the unsprayecl trees in parts 

 of that city were almost completely defoliated. The trees on the 

 campus of Rutgers College were protected with arsenate of lead, 

 and I proved to my own satisfaction that the 12-cents-a-pound 

 material made by one insecticide company was quite as effective 

 and satisfactory in all respects as the 20-cent product of another 

 company, while a 17-cent brand was inferior in arsenical content and 

 was short weight besides. It should be added here that the control- 

 ling agent in this case is a disease that attacks the pupae if the 

 weather at that period of development is damp. In 1904 it was only 

 moist, and the disease was not very prevalent ; in 1905 the weather 

 was hot and dry, the beetles all developed normally, and I prepared 

 for the danger that I felt certain would come in 1906. I was not at 

 home during the pupation of the brood last summer, so can say noth- 

 ing as to probabilities for 1907. 



The common oyster-shell scale (Lepidosaphex ulmi L.) has devel- 

 oped possibilities as a serious pest and has proved quite difficult of 

 control in the more southern parts of the State. One of the Burling- 

 ton County apple growers declares it more dangerous and difficult to 

 deal with than the San Jose scale. There are two broods of it in 

 that section of New Jersey, and in one of the towns it has developed as 

 a serious pest to shade trees, especially maples. 



Away off in one part of southern New Jersey is a little section of 

 land especially adapted to peach growing and where fine trees bear 

 excellent crops of good quality. In this corner and nowhere else in 

 the State the peach soft scale {Eulecanium nigrofasciatum Pergande) 

 has established itself, and our effort now is to prevent its getting away 

 from there. Fortunately the area is completely isolated, and there is 

 little or no chance of a natural spread, while no trees are grown for 

 sale anywhere in the infested territory. Few trees are badly enough 

 injured as yet to induce the growers to consider active measures, and 

 matters will probably become a great deal worse before they become 

 much better. 



