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.
This causes the leaves to initially yellow, dry up and turn brown. Spider mites thrive in hot weather and are worse in dry, hot summers. The phlox bugâs feeding causes white or light green spots on the leaves and buds. The leaves will eventually turn brown, dry out and drop off. The symptoms can be so severe that plant growth may become impeded and die. The phlox bug lives in the egg stage through winter on dead stems.