529 



Farley (A. J.)- Home Preparations of Lime-and-Sulfur Mixtures.— 

 Neiv Jersey Agric. Expt. Sta., New Brunswick, N. J., Circ. 24, 

 8 pp. [Received 27tli July 1915.] 



The following formula for the preparation of lime-sulphur concentrate 

 is given : Stone lime 30 lb., sulphur 60 lb., water 30-35 U.S. gals. 

 Directions for the dilution of the concentrate are added. A suitable 

 formula for self-boiled lime-sulphur is : Stone lime 8 lb., sulphur 8 lb., 

 water to make 50 gals. Four applications of the spray produce the 

 most satisfactory results in the control of peach scab ; against plum 

 curculio {Conotrncliclvs fieiwpJiar) arsenate of lead is added at the rate 

 of 3 lb. of paste or 1 J lb. of powder to 50 gals, of self-boiled lime- 

 sulphuv mixture. 



WooDWORTH (C. W.). Insecticide Formulas. — California Univ. Agric. 

 Coll., Berkeley, Circ. 128, April 1915, 7 pp. [Received 10th 

 August 1915.] 



The insecticides are given in order of their importance in California. 

 Arsenical sprays, (i) Paris green, li-2 lb. ; lime, 6 lb. : water, 

 200 U.S. gals ; (ii) neutral lead arsenate, 6-12 lb. ; w^ater, 200 gals. 

 Paris green, London purple and zinc arsenite can be applied as powder 

 at the rate of 4-6 lb. per acre, preferably w^hile the plants are moist 

 with dew. 



Poisoned baits. Bran, 10 lb. ; white arsenic, | lb. ; molasses, 



1 gal. ; water, 2 gals. 



Ant poisons, (i) For native ants : White arsenic, 2 oz. ; washing 

 soda, 4 oz. ; sugar, 1 lb. ; water, 1 pt. ; (ii) for Argentine ants 

 {Tridomyrmex himilis) : White arsenic, 1 oz. ; soda, 2 oz. ; sugar, 

 20 lb. ; water. 3 gals. 



Petroleum oils, (i) Crude oils : Crude oil, gravity 18*^ Be. ; crude 

 distillate (hea^';\^), 30° Be ; crude distillate (light), 50° Be. ; asphaltum ; 

 (ii) Refined oils : kerosene, 42° Be. ; gasoline, 60° Be. 



Oils with a high density and high flash point are desirable. Gasoline 

 is used for woolly aphis [Eriosoma lanigerum) on apple and for wood- 

 borers ; kerosene is efficient against chicken lice, ticks, etc. Crude 

 oil and distillate are spread in a thin film over w^ater infested by 

 mosquito larvae. Asphaltum is made fluid by heating and is used 

 against the peach tree borer. Distillate spray, consisting of 10 to 20 

 gals, distillate, 5 lb. caustic soda and 200 gals, w^ater, is applied 

 against European fruit scale in the dormant season by means of a 

 power sprayer provided with an efficient agitator. Miscible oils can 

 be made by mixing cresol soap with kerosene, distillate or crude oil. 

 Emulsions are the best form of oil spray ; a suitable formula is soap, 



2 lb. ; hot water, 1 gal. ; kerosene, 1 gal. 



Soaps. For plant lice, home-made soap can be made as follows : 

 Water, 25 gals. ; caustic soda, 8 lb. ; fish oil, 3 pts. ; resin, 20 lb. 



OsBORN (H.). Leaf-hoppers of Maine. — Maine Agric. Expt. Sla., Orono, 

 Bull. 238, April 1915, pp. 81-160, figs. 11-35. [Received 23rd 

 August 1915.] 



The economic importance of leaf-hoj)pers rests on their attacks on 

 such crops as oats, timothy, wheat, on various fruits and on forest 

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