558 Antheacnose of the Cucumbee undee Glass. [Sept., 



Administrative Measures. — The Rhododendron bug is in- 

 cluded amongst the pests scheduled under the Sale of Diseased 

 Plants Order of 1921, and it is an offence against that Order to 

 sell or offer for sale or cause to be sold or offered for sale any 

 plant which is substantially attacked by Rhododendron Bug. The 

 Order gives power to an Inspector of the Ministry to prevent the 

 sale or movement of such a plant. Moreover, in order to guard 

 against the further im_portation of this pest, Rhododendrons im- 

 ported from abroad must be accompanied by a health certificate 

 Diseases of Insects and Pests Order of 1921). The penalty on 

 conviction for an offence against these Orders is a fine not 

 exceeding ten pounds. Further information with regard to the 

 Orders may be obtained on application to the Ministry. 



****** 



ANTHRACNOSE OF THE CUCUMBER 

 UNDER GLASS. 



IT. 



W. F. Beavley, D.Sc, 

 Director, Experimental and Research Station, Cheshunt. Herts. 



Control of the Disease. — {a) Methods of Sanitation. — Since it 

 has been shown that C. oligochaetum may live from season to 

 season in the rotten W'oodw^ork, paper packing, etc., of the 

 houses, it is clear that special methods of winter cleansing mus^: 

 be employed after a season of disease, if the next crop is to be 

 a healthy one. 



Fumigation by burning sulphur has not proved efficient 'm the 

 past and some new method must be sought. Experiments with 

 an emulsion of cresylic acid and soft soap have shown that by 

 thoroughly spraying the diseased w^oodwork of a house it is 

 possible to destroy the infection. The emulsion is prepared in 

 the following manner : — 



Pale straw-coloured cresylic acid (97-99 per cent, purity) and pure 

 potash soft soap are placed in a bucket at the rate of 1 gallon of the 

 former to 8 pounds of the latter and heated over a brisk fire until the 

 soap is completely dissolved, the process taking about ten minutes to 

 complete. This stock solution may be stored for future use, and the 

 spray fluid is made by using one part of the stock to fifty parts of water. 



To be completely efficient the diluted emulsion must be applied 

 from a liigh-power spraying machine and should be carefully 



