206 ' GARDENING FOR PLEASURE. 



TeDtilation or light is deficient. It may be safely as- 

 serted, that in any well-regulated place where plants are 

 kept, no injury from this or Green Fly will ever become 

 serious if due attention has been given to keeping the 

 atmos})here of the place moist, and using tobacco freely 

 in any of the forms we have recommended. 



The Angle Worm. — This is the common worm seen in 

 every soil in pots and in the open ground. It is harmless 

 so far as feeding goes, for it seems never to touch plants 

 as food ; but it bores and crawls around in a way by no 

 means beneficial to pot-grown plants. It is, however, 

 easily dislodged. By slaking a quart of lime and adding 

 water to make up ten gallons of the liquid, and watering 

 the plants with it after it has become clear, the caustic 

 qualities of the lime will be quickly fatal to the worm. 

 When troublesome in the open ground, sow slaked lime 

 on the dug or plowed surface about as thickly as sand 

 is strewn on a floor, and rake or harrow it in, so as to 

 mix it with the soil. Some writers have asserted that the 

 Angle Worm benefits the soil by its movements through 

 it. Few practical gardeners will believe this, as they are 

 usually destroyed on sight by all workers in the soil. 



MILDEW. 



Mildew is a parasitical fungus, often seen on green- 

 house and other plants, and is quickly destructive to 

 their health. But, as with all other plant troubles, it is 

 best to prevent it rather than cure. Care should be 

 taken, particularly where Roses or Grapevines are grown 

 under glass (as both of these are especially liable to be 

 attacked), to avoid a rapid change of temperature, or a 

 long exposure to sudden chill by draughts in ventilating. 

 iVs soon as spots of grayish-white appear on the leaves of 

 Roses or Grapevines, either out-doors or under glass, it 

 is certain that mildew is present ; but if it has not been 



