NOTES AND ABSTRACTS. 



By culture experiments which are fully detailed the authors show 

 that both phosphorus and magnesium are necessary elements for the 

 growth of plants, although only in very minute proportion. The 

 plates and calculations of amount of these substances in the various 

 cultures bring this out clearly. — G. F. S. E. 



Chrysanthemums. By H. Koehler {Gartenflora, vol. Ixiii. pt. ii. 

 pp. 49-51 ; 3 figs.). — The following Chrysanthemums, mostly single, 

 are recommended : ' Rosenelfe,' lilac pink ; ' Ceddie White,' gold 

 with bronze tips ; * Dorothy Dann/ salmon-bronze ; * Golden Parasol,' 

 anemone, flowered gold ; ' Gaiety,' gold bronze ; ' Dr. G. Barre,' 

 purple ; ' Ami Jose Barre,' white ; ' Radium,' bronze red ; * Gerbe 

 d'Or,' pale yellow ; ' Baronne de Vinols,' pink ; ' Victoria,' nankeen ; 

 ' Mrs. R. N. Parkinson,' bright yellow ; ' Polly Duncan,' apricot ; 

 and ' Lugano,' carmine. — 5. E. W. 



Chrysanthemums, Pests and Diseases of (Rev. de VHort. Belg. 

 March 31, 1913, p. 103). — Some recipes to be used in Chrysanthemum 

 growing : — 



1. For Septoria Chrysanthemi : 



Pentasulphuret of potassium . . . .3 grammes 

 Permanganate of potash . . . . .J gramme 

 to I litre of water. 

 To be used once a week, to be followed by a vigorous application 

 of yellow sulphur or sulphur and nicotine. 



2. For Rust after it appears : 



Pentasulphuret of potassium , . . .3 grammes 

 Permanganate of potash . , . . .J gramme 

 Formic aldehyde (Formol) . . . . \ gramme 

 to I litre of water. 

 Brush the foliage with this solution or soak the plant in a bucket 

 of it. Blow yellow sulphur over it while the plant is wet. This 

 has proved a sovereign remedy. 



To prevent the fungoid diseases which attack chrysanthemums, 

 water whatever shelter they are to go under with a solution of | gramme 

 permanganate of potash to i litre of water, and when the plants are 

 put under cover, water the surface of the pots with the same mixture. 

 This sterilizes the surface of the pots, and in penetrating into the soil 

 oxidizes the compost, thereby helping the roots to assimilate the 

 manure. 



A good and cheap insecticide may be made as follows : — 

 Soft soap . . . . . . .1 kilo 



Methylated spirit i litre 



Hypochlorite of soda at 3° Baume . . i litre 

 Sapocresol . . . . . . .1 litre 



Phenic acid . . . . . . . i litre 



Ammonia ....... 200 grammes. 



One htre of this mixture to 100 litres of water, i in 25 of this 

 insecticide is a good treatment for woolly aphis. — M. L. H. 



