140 EXPERIMENT STATION RECORD. 



of application were also considered. A block of 5G7 trees was placed 

 at the command of the author for the experiments. The varieties were 

 Italian Prune, Guii, Lombard, Purple Egg, and Bavay Green Gage, one- 

 third of each being sprayed with each fungicide and the other third 

 being left as a check. The results obtained were carefully estimated 

 and tabulated nnd the superiority of Bordeaux mixture was shown. 

 The best results were obtained by 3 sprayings with Bordeaux mixture, 

 the first applied just after the fall of the blossoms, the second about 2 

 weeks later, and the last about the middle of June. The trees given 

 this treatment lost their foliage to the extent of about 10 per cent as 

 compared with 73 per cent for the eau celeste and 78 for the check. 



Tlie good effect of the use of Bordeaux mixture in checking the 

 ravages of black knot and ripe rot is commented upon, but such treat- 

 ment must be supplemented by pruning out the knots and destroying 

 all mummy fruits. 



For the leaf spot and fruit rot of bearing cherry trees the results 

 were not so satisfactory. The fruit rot was checked, but the foliage 

 was injured by the treatment. The investigations upon the treatment 

 of cherry trees are to be continued, and for the present no recommen- 

 dations are made. 



Spraying orchards and vineyards, J. C. Written [Missouri Sta. 

 Bui. 31, j)p. 21). — Spraying experiments that have been conducted for 

 2 years indicate that apple scab can be prevented by the use of Bor- 

 deaux mixture. Four applications were found more efficacious than 

 three. In orchards sprayed in 1894 there was less scab than in the 

 unsprayed ones. Bitter rot, while more destructive than usual, was less 

 prevalent on trees sprayed with a 6-pound solution of Bordeaux mix- 

 ture. Attacks of codling moth were not prevented by the use of arsen- 

 ites, the injury being due, the author thinks, to a second brood of the 

 moth appearing after the use of arsenites had been discontinued. Bor- 

 deaux mixture was efticient in causing less loss from plum rot where 

 the trees were sprayed weekly throughout the ripening period. At 

 this time ammoniacal copper carbonate solution is recommended, as it 

 does not leave a sediment that injures the appearance of the fruit. 

 Paris green was used with success for repressing the curculio. 



Notes are given on the use of Paris green for destroying the bag- 

 worm on evergreen trees. If used as soou as the eggs are hatched, at 

 the rate of 1 lb. to 300 gal. of water, the bag worm will be destroyed 

 without injury to the trees. If the worms are two-thirds grown, double 

 the strength of the insecticide will not kill the worms. Strong solu- 

 tions of arsenites can not be used on evergreens until the wood is ripe 

 and the weather dry. 



A spraying calendar is added to the bulletin. 



Directions for the use of fungicides and insecticides for the 

 season of 1896, S. T. Maynard [Massaclmseiis Hatch Sta. Bui. 37, 

 j}p. 30-40, Jig. 1). — Formulas and directions are given for the prepara- 



