196 



GARDEN FOES. 



to the bulbs, and develops into a l)lackisli mould which 

 comj:)letcly covers them. 



IxEMEDiBS. — Spray the foliage direcitly the yellow patches 

 appear with the Woburn Bordeaux Emulsion (Formula 21) 

 or Sulphide of Potassium (Formula 28). When lifting the 

 crop reject and burn evei'y diseased bulb. In the case of 



MILDEAV OF PARSMPS (PLASMASPOHA NIVEA). 



References : n, A spotted parsnip ; h, Conidiophore bearing,'- cinioia (spores) x 

 ICO; c, Mature conidiiiin dividing- x SCO; d, Conidium after division, the forma- 

 tion of zoospores, x SCO; e, Zoospore with cilia, x 5C0 



a bad attack, do not grow onions on the same plot for 

 three years. 



Onion Smut (Urocystis cepula^). — This is a black 

 mould (fungus) which attacks seedling onions and speedily 



