164 EXPERIMENT STATION RECORD. 



conducted by the Ohio station on spraying a vineyard and on treating onions for the 

 prevention of disease. The vineyard received 7 applications of fungicides, the first 

 4 of Bordeaux mixture and the last 3 of animoniacal copper carbonate. These were 

 applied at a cost of al)out $6.50 per acre. The fruit proiluced on the unsprayed tract 

 was of an inferior (luality and sold at the rate of about $6 per acre. The sprayed 

 tract gave a gross return of $122 per acre. When soda-Bordeaux mixture was used 

 to follow the ordinary Bordeaux, an increase of $18 per acre over the above sum 

 was noted. 



Experiments with onion smut treatment consisted of the application of ground 

 lime to the soil just ])efore seeding the onions and the sprinkling of a solution of 

 formalin on the scattered seed. The results obtained show that either of the two 

 methods is a better remedy than any heretofore used for onion smut prevention in 

 infected soils. 



The solubility of a mixture of copper and sodium sulphates, Massol and 

 Maldes {Comjd. Lend. Acad. Sri. Paris, 133 {1901), No. 6, pp. 2S7-.289).—T:he solu- 

 bility of copper and sodium sulphates when mixed in varying proportions has been 

 determined. It was found that at different temperatures the different compounds 

 vary in their strength of solution. At comparatively low temperatures there is ordi- 

 narily little variation in the composition of the solution, but if the temperature be 

 raised to from 23 to 33° C. the composition of the solution will vary in proportion 

 to the relative amount of the 2 salts in the mixture. 



ENTOMOLOGY. 



Some insects injurious to vegetable crops, F. H. Chittenden ( U. S. Dept. 



Agr., Division of Entomology Bui. S3, n. ser., pp. 117, Jigs. 30). — The author presents 

 descriptive, biological, and economic notes on a large number of insects injurious to 

 various garden crops. Brief mention may be made of the following species which 

 are discussed by the author: 



Potato stalh weevil {Trichoharis irinotata) (pp. 9-18). — This insect is distributed on 

 the north to Pennsylvania, New Jersey, Illinois, Iowa, and even into Canada; in 

 the South the insect is found as far as Florida and Texas. The beetles were seen 

 in the District of Columbia as early as May 20. The pupal stage is said to vary from 

 8 to 11 days. All the beetles mature by September and hibernation takes place in 

 the adult stage. The insect is attacked by Siglaphus curculionis. The best remedy 

 for this insect consists in pulling up infested vines as soon as they begin to wilt and 

 destroying all vines in the field as soon as the crop is harvested. All solanaceous 

 weeds in the neighborhood of the potato patch should also be burned. 



Thenorthern leaf -footed plant bug {Leptoglossus oppositus) (pp. 18-25). — The species 

 of this genus live in all of their stages preferably upon the fruit of the plants which 

 they attack. There is but one generation per annum of this species. The fruit 

 plants are usually cucurbits, but hibernated adults may appear on fruit trees in the 

 spring. The insect is attacked by Trichopoda pennipes. The best remedies are hand 

 picking, capturing in inverted umbrellas or nets saturated with kerosene, and free 

 use of kerosene emulsion. 



The carrot rust Jig {Psila rosnr) (pp. 26-32). — This pest caused much damage in a 

 celery field in New York during 1901. The insect occurs in England, continental 

 Europe, and has been for some years known to be an injurious species in Canada. 

 The life history of the carrot rust fly has not been carefully worked out. It is attacked 

 by Alysia apii. The best methods of control are the use of kerosene emulsion, late 

 sowing, rotation of crops, destruction of insects in stored carrots, and direct treatment 

 of the insect in celery beds. 



The carrot beetle {TAgyrvs gibhosns) (pp. 32-37). — This insect is descrilied and notes 

 are given on its habits and life history. It is distributed from Long Island to Call- 



