Lower back tightness can cause muscle twitching, pain and reduced range of motion. Photo Credit Dirima/iStock/Getty Images. Lower back muscle tightness is the cause of a muscle spasm. This can be brought on by a strain, overuse or muscle weakness, according to BetterMedicine.com. If your lower back muscles lack strength, and a stronger back muscle pulls on this weak muscle, it can create tightness or pain. While lower back tightness can be managed at home, occasionally medical intervention is needed to treat this common condition. Rest your lower back muscles.
Wasp and Scale Insects Help Control Giant Reed. An arundo gall wasp deposits eggs into the main stem of a giant reed. (Image by USDA/ARS) The release of tiny insects to combat the invasive weed giant reed is paying off, according to a recent U.S. Department of Agriculture (USDA) study.
Life Cycle. In the spring the female deposits up to 16 or more eggs in a leaf bud at the base of the apical meristem. The eggs hatch after 10 to 15 days and the larvae begin feeding on stem tissue. The plant responds by producing a thick layer of stem cells around the larvae. The gall is first noticeable when it is about twice as wide as the shoot. At this phase each larva is small and eats little.