Four major types of limestone formations (speleothems): Dripstones: Straws are thin walled hollow formations that resemble drinking straws. As water drips slowly from the roof of the cave, it deposits a microscopic ring of calcite crystal. These rings continue to build and can form straws many centimetres long.
If the sample has more than two or three grubs, you should probably take steps to reduce grub damage. Because grubs sometimes damage only parts of a lawn, take more than one sample if the lawn is damaged in patches.It might not be necessary to treat the entire lawn.t may even become possible to roll the turf up as if it were carpet. You should also control grubs if you notice other animals, such as crows, raccoons or skunks, digging up grubs in the yard and causing damage. In temperate climates, grub damage will be most pronounced during late summer and fall.
Use GrubEx only once a year, in the spring through early summer, before insect eggs hatch. GrubEx is a granular product that you can apply to your lawn by using a rotary or drop spreader, at the rate of 2.87 pounds per 1,000 square feet of turf.rubEx controls beetles and chafers plus numerous pests other than grubs, such as caterpillars and weevils. Caterpillar larvae include cutworms, armyworms and sod webworms. Weevils, such as billbugs, also produce white grubs, but they characteristically have no legs compared to other white grubs.