The Pro Farmer

How to treat Septoria leaf spot disease

septoria lycopersici

It is a fungus attacking only tomato and potato.

Circular spots with dark-brown margins appear scattered over the leaves.

Later, the spots enlarge and coalesce, and black dots appear in their centers.


Heavily infected leaves turn yellow, wither, and fall off.

Chlorothalonil
Cyproconazole
Azoxystrobin
Mancozeb

Organic:

Copper Hydroxide

It helps prevent the germination of fungal spores.

It is proven and reliable to be powerful while ensuring plants’ safety.

This OMRI-listed product comes in a dry powder formula that is easy and convenient to apply.

Features excellent plant tenacity and delivers maximum bioavailability.


Copper sulfate –

It is an inorganic compound that combines sulfur with copper.

It can kill bacteria, algae, snails, and fungi.

It controls fungal diseases by damaging enzymes and proteins critical to fungal growth.

It has been registered for use as pesticide product in the United States since 1956.

Mineral oil

Covers the egg, larvae, nymph and adult stages, causing suffocation.

It leaves no toxic residue on plants.


Bacillus Subtilis

A biological fungicide containing a strain of the bacterium Bacillus subtilis.

The bacterial spores occupy space on the plant surface, and compete with the pathogens; then active compounds called lipopeptides, produced by the bacterium, disrupt the germination, and growth of invading pathogens.

Due to this action, resistance is not likely to develop.


Neem oil

A naturally occurring pesticide, found in seeds from the neem tree.               

Azadirachtin is the most active component here.                                                         

It reduces insect feeding and acts as a repellent.

It also interferes with insect hormone systems, making it harder for insects to grow and lay eggs.

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