WINDOW GARDENING 



KINDS OF INSECTS 



All insects attacking house and garden plants 

 may be divided into two general groups, accord- 

 ing to their manner of feeding — namely, biting 

 insects and sucking insects. In the first group 

 the insect in feeding devours the tissues of the 

 plant and incidentally any poison that has been 

 applied to the surface. The poisons mostly used 

 for this group are Paris green and hellebore. 



In the second group the insects secure their 

 nourishment by sucking the fluids from the inner 

 tissues of the plant, so that poison applied to the 

 surface is ineffective. Insects of this type must 

 be exterminated by some substance which is poi- 

 sonous when breathed or which kills when 

 brought into contact with the insect. Tobacco 

 in some of its forms is usually used for this pur- 

 pose. 



THE ENEMIES OF HOUSE PLANTS 



There are four iftsects which are liable to be- 

 come troublesome in the window garden — the 

 plant-louse, scale, mealy-bug and red spider. 



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