Aonla: Diseases, Symptoms and their Management

Important Topics

May 5, 2023 no responses

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Anola Diseases

Causal organism: Fungus; Revenelia emblicae.

Symptoms

Initially, a few black pustules form on the fruits, which later expand into a ring.
The pustules connect and cover a large region of the fruit.
After rupturing a papery coating, the black spores are revealed.
It is believed that fruit infection does not spread to the leaves.

Management:

Spray of Chlorothalonil @ 0.2 % reduced the disease up to 69.75 percent. Three sprays of wettable sulphur (0.4%), and Zineb (0.2%) during July and September.

Causal organism: Fungus; Capnodium spp.

Symptoms

Sooty mould anola diseases cause a velvety covering of black fungal growth on the surface of leaves, twigs and flowers.

Management:

Spray starch @ 2%, lambda-cyhalothrin @ 0.05% and wettable sulphur @ 0.2% can be mixed in starch if the infection is more.

Causal organism: Fungus; Penicilium citrinum.

Symptoms

It generates brown blotches and water-soaked places on the surface of the fruit.
As the condition advances, three distinct colours emerge in succession: bright yellow, purple-brown, and lastly bluish-green.
Drops of yellowish liquid are flowing from the fruit’s surface.
The fruits have a foul scent and eventually, take on a bluish-green beaded look.

Management:

Treatment of fruits with borax or sodium chloride (1%) checks the blue mould infection.
Treatment with carbendazim or thiophanate methyl 0.1% after harvest.

Causal organism: Fungus; Phomopsis phyllanthi.

Symptoms

Within 2-3 days of infection, smoke brown to black circular lesions appear.
The infected regions eventually turn olive brown, with water-saturated areas extending towards both ends of the fruits, giving an eye shape.

Management: