Yes, Talstar PL Granular Insecticide are labeled for crane flies. According to the product label, it should be used early to mid-season to control the larvae of crane flies. This application should be made between August-February during times when the ground is not frozen as they feed on plant crowns. If treatments are made in March-April, they may only provide suppression.
Consult your local extension agent for specific recommendations for your area.
Talstar PL granules should be applied and watered in. Applying the product to wet soil will not activate them.
Talstar PL Granules is an insecticide. It will not harm, inhibit, or promote any kind of growth in turf grass. You may have insect damage or a fungal disease causing your issues.