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When your lemon is indoors for the winter, you may need a humidifier to keep the leaves from drying out and dropping off—unless you are keeping your potted citrus in a greenhouse. Citrus needs ...
The best time to prune a lemon tree is right after all the fruit has been harvested, which can vary depending on your USDA zone. However, it typically happens in later winter or early spring.
Alternaria leaf spot of rough lemon Alternaria citri: Alternaria stem-end rot Alternaria citri: Anthracnose = wither-tip Glomerella cingulata Colletotrichum gloeosporioides [anamorph] Areolate leaf spot Thanatephorus cucumeris = Pellicularia filamentosa Rhizoctonia solani [anamorph] Black mold rot Aspergillus niger: Black root rot Thielaviopsis ...
Iron deficiency showing chlorotic leaves in a lemon tree. Compare yellow chlorotic leaves with the green non chlorotic leaves at left of this image. Iron (Fe) deficiency is a plant disorder also known as "lime-induced chlorosis". It can be confused with manganese deficiency.
Phyllosticta citricarpa is a plant pathogen, some strains of which cause a leaf condition called black spot on citrus plants. [2] As a result, such strains are subject to phytosanitary legislation in the European Union and the United States.
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The blight spreads through an infected tree, invading and colonizing the plant's roots, leaves, and trunk. As of 2020, neither the causal agent nor the spreading mechanism of the disease is known. [2] Research by the Citrus Research and Development Foundation posits the blight is caused by an endogenous plant pararetrovirus (EPRV). [3]
The lemon (Citrus × limon) is a species of small evergreen tree in the Citrus genus of the flowering plant family Rutaceae. The lemon is a hybrid of the citron and the bitter orange . Its origins are uncertain, but some evidence suggests lemons originated during the 1st millennium BC in what is now northeastern India .