For Gambel oak management including removal and pruning in and around Larkspur area, call (719)400-9104. In addition to scrub oak pruning and removal, gambel oak management also includes tree insect control. Insects are an essential piece of an ecosystem. They provide sustenance for the animal population in the area and also can help with the soil and distribution of seeds. However, insect infestations can cause damage to your trees and shrubs including scrub oak. Below we look at the main types of insects that can cause major problems for the scrub oak bushes. Which Insects Like Scrub Oak? 1. Cicadas. Cicadas usually appear in huge numbers for around six weeks in June/July. They are a large insect with wings that