For a medical symptom description of 'Muscle jerks', the following symptom information may be relevant to the symptoms: Muscle spasms (symptom). However, note that other causes of the symptom 'Muscle jerks' may be possible. More information on symptom: Muscle spasms: Muscle spasms.
Feeling the Heat. Excessive sun exposure and cold temperatures can turn lemon tree leaves yellow. Scorched leaves, which look bleached or have yellow patches, often appear only in parts of the tree facing the afternoon sun, but a cold snap affects leaves all over the tree.ellow lemon tree leaves can be a sign of disease. A lemon tree growing on poorly drained soil can develop Phytophthora root rot, which causes pale green to yellowish leaves.
Brown Fall Color. Many oaks that turn yellow or red in the fall will also exhibit some brown fall color concurrent with other colors, such as the chestnut oakâs yellow and brown fall foliage, or the brownish-red fall color of the red oak.ak trees (Quercus spp.) are either evergreen or deciduous, depending on species. Some oaks, such as the evergreen Coast Live Oak (Quercus agrifolia), hardy to U.S. Department of Agriculture plant hardiness zones 9 and 10, do not lose their leaves in fall.