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.
Follow these treatment guidelines: 0â5 grubs: No need to treat. 6â9 grubs: No need to treat a healthy lawn â unless animals are digging to feed on grubs. In a large yard, you may want to treat highly visible, used areas, but not treat the âback 40â section. A stressed, less healthy lawn will likely require treatment.