EXPERIMENT STATION BULLETINS. 427 



but never buy any unless it comes in tightly sealed packages. It loses 

 its strength on short exposure to the air. An hour will suffice to weaken 

 it. It must be applied from time to time, as it quickly loses its strength. 



HYDRATED LIME. 



Fresh hydrated-lime is sometimes useful, because of its slight 

 caustic properties. It is especially useful against such larvae of saw- 

 flies and beetles as are sticky, as well as those of the cherry-slug and 

 of the asparagus-beetle. The lime may be dusted on and used as a 

 substitute for a poison if the latter for some reason is undesirable. This 

 is not to be confused with ground quick-lime, which is used in making 

 bordeaux-mixture, the latter being very caustic and likely to burn the 

 foliage. Nor should hydrated-lime be confused with air-slaked lime, 

 since the latter is not caustic at all. Hydrated-lime, when dusted on 

 sticky larvae, clings to their bodies and attacks them through their 

 skins. 



Poison Bran (Kansas Bait). 



This is especially useful for combating cut-worms. Sift together 

 one pound of Paris-green or ^ pound of white arsenic (not arsenate of 

 lead) and 20 pounds of bran; add half a gallon of molasses or syrup and 

 a little water and add a small quantity of ethyl acetate (acetic ether) 

 or amyl acetate, which has the odor of bananas, — enough to distinctly 

 scent the bait. This may be broadcasted over from two to five acres 

 of land. It is very attractive to both cut-worms and to grasshoppers. 

 Do not try to substitute amy other poison for the Paris-green or white 

 arsenic. Neither arsenate of lead nor arsenate of calcium will do the 

 work unless large quantities of the poison are used. Neither should one 

 use this bait where poultry are likely to pick up much of it, although the 

 bait should be distributed in a finely broken up condition rather than in 

 lumps. 



CRIDDLE MIXTURE. 



Criddle-mixture is horse-manure mixed with an arsenical, and 

 slightly salted. It is to be distributed about the field in small masses, 

 and is especially useful in combating grasshoppers, as it takes ad- 

 vantage of their well known love of salt. The proportions are as fol- 

 lows: Paris-green, one pound, or white arsenic, one pound; salt, two 

 pounds; fresh horse-manure, 100 pounds or five three-gallon pailfuls. 

 The salt is dissolved in a pail of water, the poison stirred in, and the 

 whole mixed with the horse-manure in a half barrel. 



SAWDUST GRASSHOPPER BAIT. 



Into a bushel of fresh hard-wood sawdust pour and tlioroughly mix 

 a mixture made as follows: — one gallon of water, one pound of white 

 arsenic, (not arsenate of lead or calcium), a cup of molasses and one 

 pound of salt. Add an ounce or so of either ethyl acetate or amyl 

 acetate, — ^the former has the odor of pomace and the latter the odor 

 of bananas, and either one is attractive to grasshoppers. Add enough 

 water to produce a good stiff mash and broadcast. The ethyl acetate 

 and amyl acetate are not absolutely necessary but they do make the 

 bait attractive. 



