11.   Large crabgrass, the most common variety, has fine hairs on the tops of the grass blades.

12.   Thatch is the layer of decaying plant matter and debris that forms between the grass blades and the soil.

13.   The first symptom of the disease is yellowing grass blades.

14.   The rubber clings to the base of the grass blade, so the treatment lasts indefinitely.

15.   They look like they are eating the tips of the grass blades.

16.   Unlike grubs, which eat roots, armyworms feed on the grass blades and expose the critical base to the intense heat.