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Leaf spot disease control using Neem oil:

Leaf spot is a fungal disease caused by the fungus such as Pyrenophora tritici-repentis, Cercospora zein, Cercospora zeae-maydis, Colletotrichum graminicola, Puccinia sorghi, etc. in various food and ornamental crops as well. The spot in the leaves of the plant is identified in brown, black and yellow pigments. It spreads to the entire foliage slowly making the plant look decomposed and on later stage the leaves get withered.


Transmission of the disease to the adjacent plants may be due to wind factor. These bacterial or fungal spots are observed to be active during warm-humid environment, thus spreading is more likely to occur during the prevalence of such conditions. Mostly plants fall prey to this disease and rarely trees. Aesthetic view of flora is one of the facts that get disturbed by the disease. Some other symptoms include dark concentric rings around the spots which on later stage combine all other spots into a single large blotch that remains as a stain of the leaves. Anthracnose is a type of leaf spot disease causing such intense stains over the leaves of the sycamore trees. Size and color of the spots depend upon the plant species and the fungus involved in the attack. Identification of the spots is done prior before the treatment of spots.


Control of disease can be done by some productive measures like providing ample space between the plants, sprinkling of water at the lower level instead of spraying over the leaves, removal of infested parts of the plant, spraying of effective organic fungicides over the infected plants.


Firstly, leaving ample space in between the plant rows can make sure the disease not spread to the neighbor plants from the infected one. The fungus responsible for the cause of disease is found to spread by irrigation water that is sprinkled over the plants and consequently, sprinkling at the lower level can avoid it. Infested leaves should be removed for the further extent of infection.


Organic fungicides like Neem oil can serve as an effective treatment of the fungus spots as neem is well known for it characteristic fungicidal property. Azadirachtin content of neem oil can eradicate the fungus present on leaves and can also evade them from the future spread to the susceptible plants. The practice of spraying should be done once in 10 days for efficient manage of spots. EPA registered Neem oil shows the positive effect and it is diluted with water before use.

Author: Adam Teaser - neem articles


The views expressed by the author are not necessarily those of Plasma Power Private Limited. Reproduction of the articles does not in anyway form an endorsement

 

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