Bacterial scorching disease can affect any part of the infected plant and any stage of plant growth.
In the early stages of plant growth, submerged, spherical or irregular wounds spread to the stem and eventually die of withering and sprout which is known as seedling blight.
Small, dark green, submerged angular spots first develop on the lower surface of the leaves, gradually these spots grow dark brown and later these spots appear on the surface of both leaves, called the angular leaf spot.
In this, the veins of the leaves turn black and the leaves start to appear wrinkled and twisted. Which is called vein necrosis.
Black wounds on the trunk and branches and premature fall of leaves is a symptom known as Black Arm.
In this disease, rotten seeds and fibers become colorless in the bolls. In the infected boll, the angular round submerged spots appear which become pitted and dark brown or black over time, this is called Boll rot.
Some seeds do not grow after 10 days of sowing cotton in the field and some plants die after growing.
This can happen due to many reasons such as rotting of seeds, sowing the seeds in more depth, eating of seeds by any insect or not getting enough moisture, etc.
In these empty places, there is a direct effect on production if the plant does not grow, so seeds should be sown again at these places. This action is called Gap Filling.
The distance between the plants in the queues in the cotton field should be the same. The process of filling this space is called Gap Filling.
Gap filling keeps the distance between the plants the same. Due to which the production of cotton is good.
On the other hand, if more than one seed falls at the same place at the time of sowing, more plants grow at the same place.
If these plants are not removed timely, then it directly affects our production.
Therefore, the removal of these extra plants is called Thinning. In the cotton crop, Thinning is done 15 days after sowing. So that the plants get the right amount of manure and fertilizer and the plants get proper growth.
The withering of cotton plants is the first symptom of this disease.
Due to this, in severe cases all the leaves may fall or the plant may fall.
In this disease, the root bark bursts after yellowing due to which water and nutrients do not reach the plant properly.
The entire root system rotting and the plant can be uprooted easily.
Initially, only a few plants are affected in the field. Then, with time, the disease spreads around the entire field, forming a circle around these plants.
To prevent disease, seeds should be treated @ 5 grams of Trichoderma viride or 10 grams of Pseudomonas fluorescens per kg. or
Treat seeds @ 2.5 gm Carbendazim 12% + Mancozeb 63% WP per kg.
To protect, spread 2 acres of Trichoderma viride in 4 tons FYM and spread it in an acre field.
For disease control, mix 500 gm of Carbendazim 12% + Mancozeb 63% WP or 500 gm Thiophanate Methyl 75% WP or 600 gm Metalaxyl 4% + Mancozeb 64% WP in 200 liters of water and drenching near the stem of the plant.
