NEW JERSEY. 195 



in this crop within the State, and this fact is regarded as mainly due 

 to the station Avork with it. 



The woric of the biologist was confined to the subject of oyster cul- 

 ture, and related in particular to a study of the infiueuce of meteor- 

 ological factors on spawning and spatting, and the effect of " float- 

 ing" oysters in water of less saline content than that in which they 

 were grown. It was ascertained that though oysters spawned 

 abundantly at different times during the summer, only the spawn 

 ejected in June effected a set of spat or seed, and that this was less 

 abundant than normally on account of the cold weather of May and 

 early June, 



The expenses of the investigation of " floating'" were borne in part 

 by the Oystermen's Association and in part by the State Bureau of 

 , Shell Fisheries. 



The entomological Avork of the station covered investigations on 

 insects injurious to strawberries and sweet potatoes in New Jersey, 

 on root maggots and on insecticides not yet tested out. such as sul- 

 phate of nicotin, arsenate of iron, dry arsenate of lead, lime-sulphur, 

 and oils in combination and the like. Results published in Bulletin 

 225 with reference to insects injurious to strawberries show that the 

 injury of these insects may be limited by certain practices with a 

 minimum resort to insecticide applications, while the results in Bul- 

 letin 229 show that it was possible to avoid practically all insect 

 injury to sweet potatoes by proper early practice with little resort 

 to insecticides. 



The entomological department of the station cooperates with the 

 State entomologist in the inspection of imported nursery stock. Co- 

 operative work is also carried on Avith farmers in the comparative 

 testing of insecticides under different conditions and in studying the 

 effect of farm practice on the development of insects and chiefly of 

 the underground species. 



The following publications were received from this station during 

 the year: Bulletins 220, Concentrated Feeding Stuffs; 221, Investi- 

 gations Relative to the use of Nitrogenous Materials, 1898-1907; 

 222, Analyses of Paris Green and Lead Arsenate; 223, Analyses and 

 Valuations of Commercial Fertilizers — Analyses of Fertilizer Sup- 

 plies, Home Mixtures, and Special Compounds; 224, Analyses and 

 Valuations of Commercial Fertilizers and Ground Bone — The Cost 

 of Available Nitrogen; 225, Insects Injurious to Strawberries; 226, 

 Peach Yellows and Little Peach; 227, Tests of Commercial Cultures 

 for Soil Inoculation; 229, Insects Injurious to Sweet Potatoes m New 

 Jersey; 230, Concentrated Feeding Stuffs; and the Annual Report 

 for 1908. 



