Plants

Lemon Diseases

The lemon

The lemon is a fruit plant that has arboreal characteristics that belongs to the Rutaceae family and in particular to the Citrus genus. The origin of the plant is uncertain and it is thought to have been created by hybridization from 2 ancient citrus fruits, the pomelo and the cedar, even if over the centuries it developed as an autonomous species that is reproduced both by grafting and by cuttings. The lemon plant was originally cultivated as an ornamental, now its main use is for the consumption of its fruits. The lemon has a white color of the flowers with purple streaks. The fruit has variable characteristics depending on the quality, in fact you can have spherical or oval fruits, with smooth or rough skin, with different thicknesses of the skin and above all of variable dimensions.

Diseases of lemon


The Lemon diseases may be varied in nature, and would be able to affect different parts of the plant. Depending on the affected area, there could be effects such as abnormal fruit development, lack of blooms or plant death. The diseases that could affect a lemon tree could be powdery mildew, cochineal, root rot, sore dryness, as well as various attacks by viruses and bacteria. Powdery mildew is a disease that usually affects the leaves of the lemon and occurs when the climate is hot and there is a high level of humidity. Powdery mildew is caused by a fungus that causes dusty patinas on the upper surface of the leaves, reducing the photosynthesis process. Copper could be the solution to the problem.

Lemon parasites


The cochineal is an insect that could attack lemon plants in particular conditions of humidity and lack of aeration, this in fact could happen if the plant is grown in a greenhouse during the winter period. Mealybug spoils plants by attaching themselves to the leaves and feeding on the sap. If the infestation was not too extensive there should be no problems for the plant, however to prevent the plant from suffering it is possible to eliminate insects by spraying white oil on the leaves. The oil, creating a patina that covers the leaves, is able to suffocate insects. The intervention with white oil is to be absolutely avoided during the hottest periods, since not allowing the leaves to transpire could cause extensive damage to the leaves.

Lemon Diseases: Pathologies of the lemon tree


The Lemon diseases may occur often if the plants are grown in greenhouses, because of the proximity of the trees and the lack of ventilation of the premises. Aphids could cause damage if present in large quantities. In fact, like scale insects, aphids are also able to suck the sap, while at the same time producing honeydew, a sugary substance that covers the leaves. The honeydew if deposited in large quantities and on large portions of the plant could cause the onset of smokiness. If this fungal infestation develops excessively it could cause serious damage to the photosynthesis processes, causing necrosis of the leaves and extensive damage to the plant. Sick dryness is a fungal disease that could cause the plant to dry out.

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