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.
Lachrymans. 1  Leaves develop small, angular, brown or straw-colored spots with a yellow halo. 2  Leaf spots dry and drop out, leaving irregularly shaped holes in the leaves. 3  Water soaked to tan small circular spots on fruit.  Sticky drops of whitish liquid for on the underside of the leaf when wet, dry to a crust when dry.