Environment

• Most lawn bug control products will list specific areas of a landscape that should not be treated or should be treated with less of the product. For example, roses and decorative shrubs are sensitive to some of the chemicals in many lawn bug control products. Therefore, if the products are to be applied around these plants, they must be used in a reduced quantity. In terms of reapplication, it would be advisable to wait extra long before applying the product around these plants again for that same reason.
  
  

Type of Product

• Lawn bug control products are available in liquid and granule form. Each form contains the same basic active ingredients. The type of product selected should be dictated by the area to which it will be applied. Specifically, if there are pets or children in the yard, this should dictate the selection of a liquid. Liquid products do need to be applied more frequently, many list every four to six weeks, but they do not leave a concentrated presence at the surface for pets and children to contact. Granules, on the other hand, stay present at or near the surface of the lawn and slowly break down and release their chemicals. This allows them to remain effective longer, with some products even advising that a single application will last all summer. However, they're also more available for contact with pets and children.
  
  

Weather

• Both the liquid and granule forms of these products rely on rainfall or irrigation to remain effective. Granules in particular are sensitive to period of extended dryness, as water is what causes them to break down and release the bug-controlling chemicals. If the lawn goes without much water for several weeks, it may reduce the effective time of the products.
  
  

When to Apply Again

• There isn't an exact frequency with which lawn bug control products can or should be reapplied, but each of these factors combined with recommendations of the manufacturer provide a guide. It is important to note that, although not all manufacturers include a minimum time to wait between applications, some do. In these cases, that number should be honored regardless of the other factors involved, as exceeding the recommended number of applications could pose a health risk to pets or children and could damage the lawn or other landscape plants.