THE WEED problem: INSECTS, ETC. 75 



scribed, for the machine will then simply cut the 

 leaves, actually stimulating the stalks below to 

 further growth and tighter rooting into the 

 ground. RoUingwith a three-thousand-pound 

 machine has killed crab grass in Philadelphia. 



OTHER WEED GRASSES 



Bermuda grass (Capriola, or Cynodon,Dac- 

 tylori) is objectionable in Northern lawns merely 

 because it becomes discoloured on the first 

 touch of frost, leaving ugly brown patches. 

 Of itself it is not otherwise undesirable. In 

 a blue grass lawn this patchiness toward 

 the end of the season is very undesirable, and 

 the Bermuda grass may therefore be classed 

 as a weed north of Washington. South of 

 that city and especially upon the sandy soils 

 of the Atlantic coast Bermuda grass is the 

 main dependence for lawns. 



As the fall approaches, orchard grass 

 (Dactylis glomerata) is likely to make its 

 appearance in many lawns, so is timothy 

 (Phleum pratense). They may even come in 

 accidentally with low grade lawn mixtures. 

 Wherever they appear they should be ruth- 

 lessly dug up; in fact no strong growing 

 bunch or tuft grass should be tolerated for 



