192 GARDEN FOES. 



which form it may reuiain inactive in the fsoil from season 

 to season, only to spring into hfe again on the advent of 

 warmth and moisture. These latter conditions are abso- 

 lutely necessary to the pest, and so it can only attack 

 plants under glass, attempts to inoculate plants grown 

 outside having failed. There is said to be no risk of in- 

 fection from the seeds. 



Eemeuies. — The foliage should be kept as hardy as pos- 

 sible by the admittance of plenty of air, and the atmo- 

 sphere should not be kept any moister than is absolutely 

 necessary. Spraying in anticipation, with a solu- 

 tion of two ounces of potassium sulphide in three gal- 

 lons of water, adding two ounces of soft soap, is recom- 

 mended. The under sides of the leaves should be carefully 

 sprayed and the soil well drenched with the solution if the 

 disease is present. Diseased leaves should be removed 

 and burnt. After a crop has been taken out the soil 

 should be soaked with a solution of Jeyes' Fluid — one 

 ounce to the gallon of water — or Formula 11 be used. 



Cucumber Mildew (Oidium erysiphoides).— A form 

 of mildew^ or wdiite mould which occasionally attacks the 

 foliage of the cucumber and melon, forming white blotches 

 on the surface. Plants attacked soon become sickly and 

 fail. 



Remedy. — Thoroughly coat the surface of the leaves w^ith 

 flowers of sulphur, applied by means of a sidphurator, 

 directly the mould is seen. 



Cucumber Rot (Hypochnus cucumeris). — A fungus 

 which, in the form of a grey, film-like growth, attacks the 

 stems of cucumbem near the soil, causing them to die. 



Remedies. — Rub a little lime on the base of the stems. 

 Burning the infected roots and stems will prevent the dis- 

 ease spreading. 



Lettuce Mildew (Bremia lactucne).— A minute fun- 

 gus wdiich covem the under surfi^ce of the leaves of let- 



