NOTES AND ABSTRACTS. 



903 



amount to a thinning of the fruit, and in a season of heavy blossom gives 

 the fruit a better chance to develop, as although fewer in number the size 

 of fruit and total yield are increased. Spraying in full bloom would not be 

 advisable in a season of small quantity of bloom. The writer considers 

 the danger of spraying when in bloom to bees and birds that visit the 

 blossoms to be more imaginary than real. 



Plum curculio is well illustrated, also drawings of two forms of sheet 

 catchers to catch the weevils when trees are shaken. 



Apple and Plum aphis and mussel scale are fully dealt with, also 

 preparation of fungicides and insecticides, and spray pumps. — G. H. H. 



Spraying- Calendar Fungicides, Insecticides (U.S.A. Exp. Stn. 

 Hatch,-Bull. 96). — Numerous receipts ; it is stated that Bordeaux mixture 

 destroys flea beetles. 



Treatment of greenhouse plants. — When greenhouses are empty the 

 house may be closed and 6 oz. sulphur burnt to 1,000 cubic feet of space. 

 Keep the house closed at least twelve hours. For red spider and mites — 

 mix well 1 oz. flowers of sulphur in 1 gallon water and spray over infested 

 plants ; soapsuds may be used instead of water with good results. For 

 plant lice, aphides — burn tobacco stems. For thrips — mix A oz. nicotine 

 in 5 fluid oz. water per 1,000 cubic feet and vaporise in the house at 

 night ; will kill most of the thrips. — C. H. H. 



Spraying* with Paris-green. By J. K. Haywood (U.S.A. Dep. 

 Agr. Bur. Chem., Bull. 82). — Free arsenious oxide being the constituent 

 of Paris-green is liable to scorch the foliage. The States of California 

 and New York have therefore passed laws limiting the amount of free 

 arsenious oxide to 4 and 3*5 per cent. 



Experiments were made with samples of Paris-green with from 4*29 

 to 8 per cent, soluble arsenious oxide, used with and without lime ; the 

 experiments were made at six State experiment stations. 



Peach and Plum were more susceptible to injury than Apple and Pear ; 

 Peach trees should never be sprayed without the addition of lime to the 

 Paris-green. 



The following table gives the amount of soluble arsenious acid it is 

 advisable not to exceed : — 



Photographs are given showing Peach trees normal and sprayed with 

 Paris-green without lime, showing the ill-effect of the latter. 



The strength used in the experiments was 1 oz. Paris-green to 9| 

 gallons water (1 lb. to 150 gallons) for Apples and Pears ; 1 oz. to 15^ 

 gallons of water (1 lb. to 250 gallons) for Peaches and Plums. — C. H. H. 



Spruce : Influence of Mountain Pine on Growth. By P. G. 



Muller (Nat. Zeii. Land-Forst. i. pp. 290-306, 377- 397 ; 11 figs. ; 1903).— 

 Spruce is an important forest tree in the heath region of Jutland, and 

 widespread failure in its culture has attracted attention. The trees, after 



Apple 

 Pear 

 Peach 

 Pium 



Without lime. 

 6 per cent. 



With lime. 

 7 per cent. 



6 

 0 

 4 



4-5 

 6 



