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.
Many selections are fairly susceptible to disease. Select from the disease-resistant ones. Scab infection takes place early in the season, and dark olive green spots appear on the leaves. In late summer the infected leaves fall off when they turn yellow. Infected fruits have black, slightly raised spots. Use resistant varieties to help avoid this severe problem. Fire-blight-susceptible trees have blighted branch tips, particularly when the tree is growing rapidly. Leaves on infected branch tips turn brown or black and droop, and hang on the branches.