G64 EXPERIMENT STATION RECORD. 



Report of the entomologist, J. B. Smith (New Jersey Stas. Bpt. 1896, 

 ]>}). 133-503, figs. 16). — This voluminous report is devoted largely to a 

 consideration of the San Jose scale in California and other parts of the 

 United States, with especial reference to the best means of dealing 

 with it in New Jersey. There is besides this a discussion of the insects 

 most injurious during the year in New Jersey. Among these the army 

 worm is mentioned as having appeared in very destructive numbers in 

 various parts of the State. This insect is described in detail, its life his- 

 tory, natural enemies, and the proper remedial measures are discussed. 

 From several places it was reported as attacking oats, wheat, rye, 

 grass, and corn. Its distribution was somewhat irregular and, as a 

 whole, comparatively little injury was done, it being confined in some 

 cases to single fields. In no place did it appear as a second brood. 



The number of worms is controlled by climatic conditions that favor 

 the development of disease and by natural enemies such as Calosoma 

 calidum and the fly, Nemorea leucaniiv. The most practical remedy, 

 the author thinks, is poisoned bran, but if this is unavailable the fur- 

 row barrier remedy may be resorted to, or, if the insects are in a small 

 area, kerosene may be used. In any case remedial measures should be 

 taken early. 



Other insects noted in the general review as injurious during the 

 year are the melon louse, which caused considerable financial loss; the 

 Hessian fly, strawberry leaf roller, root lice, strawberry weevil, cut- 

 wornis, wireworms, currant spanworm, and the caterpillars of the cab- 

 bage butterfly; the last were exceptionally numerous. There was 

 scarcely a field in some portions of the State which was not seriously 

 injured. 



Injuries were also done by the oak primer, hay worm, pear midge, pine 

 sawfly (Lophyrus abbottii), vine leaf hopper (Eryihroneura vitis), maple 

 pseudococcus (Pseudococcus aceris), tulip soft scale (Leeanium tulip if era), 

 click beetle (Monocrepidius respertinus), locust leaf beetle (Odontota 

 dorsalis). and the harlequin cabbage bug (Murgcmtia histrioniea). The 

 last insect, it is stated, has hitherto not been injurious in New Jersey. 

 The reports of its ravages were first received from Camden. 



Discussing the subject of sprays it is noted that a spray made of 1 

 lb. arsenic to 200 gal. of water will be perfectly safe and effective in 

 the case of currants if applied 2 weeks before picking time. Hellebore, 

 ordinarily effective against the currant worm, was tried against the 

 spanworm with little success. 



The author's experience with Dendrolene during the year was much 

 the same as in the previous season. Applied thick and allowed to 

 remain on thin barked trees it causes injury. Since chemical tests show 

 that it is neither acid nor alkali and is not poisonous, the injury is 

 thought to be due to the penetration of the greasy substance into the 

 plant cells. 



The results of correspondence relative to the common injurious 



