Other Lawn Problems
Yellowish grass: This common symptom may have several causes. If you think the lawn may suffer from lack of enough nitrogen, feed it: if from chlorosis - caused by trace elements being tied up by too much alkalinity or acidity - apply a chelated iron; if from general weakness due to disease - use a fungicide; if from compacted soil - aerify it; or if from standing water - drain it. See the soils section for more information.
An insecticide spread uniformly is the cure. Unfortunately, some insects build resistance to an insecticide. Ask your local garden center or county agent what insecticide to use locally. Alternating different insecticides helps prevent the building up of resistance against a single chemical. Be careful, this stuff is hazardous to your health and a hazard to the environment
This is easier to prevent than to control. Almost any general-purpose fungicide (ask at your local nursery) can help check disease if applied shortly before trouble usually appears. During the warm growing season, disease prevention is difficult; new grass leaves pop out every few days and of course do not have a protective cover of fungicide unless this is applied almost weekly. You can usually help the situation by temporarily withholding water and keeping the lawn relatively dry, since disease thrives most under humid conditions. Also do not fertilize heavily in hot weather, since lush grass is more susceptible.
Moles and Other Burrowing Animals:
They are looking for food and can usually be forced to go elsewhere if the grubs and other insects for which they are looking are eliminated by an insecticide. Such insecticides are applied in much the same way as crabgrass preventers, and over a period of months will complete their mission.
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