298 



THE SCHOOL GARDEN. 



and a list made of all which from their numbers on culti- 

 vated land may be regarded as important. 



It may be well at the next stage to elicit from the pupils 

 the various ways in which weeds do harm. Such an 



Fig. 159. Turnip Beetle (Phyllotreta nemorum), adult, pupa, and larva. 



The beetles figured on the leaf above are slightly less than natural size. The larva 

 burrows in the soft tissue of the leaf between the iipper and under sides. 



enumeration will but emphasise the needs of all plants 

 in order that they may successfully maintain existence. 



Weeds rob the cultivated plants of room. This involves 

 loss of food material from soil, including fertilisers ; from 

 the atmosphere, light and carbon dioxide. 



