Collar rot – Gramophone

How to prevent Watermelon from collar rot

The whole plant rot and die in the final stages.
To prevent this disease, seeds should be treated at the rate of Carbendazim 12% + Mancozeb 64% @ 3 g/ kg seed.
Trichoderma viride @ 1 kg + Pseudomonas fluorescens @ 1 kg make the solution in 200 litres of water and apply as root drenching or
Drenching at 10 days intervals by making a solution of Kasugamycin 5 + Copper Oxychloride 45 45 WP or Carbendazim 3 g or Metalexyl 8% + Mancozeb 64% WP @ 500 g / acre.

Destroy of the debris of diseased plants.
Crop rotation and ensure good drainage.
Sowing of seeds on raised nursery beds.
Treating seeds with Carbendazim 12%+ Mancozeb 64% @ 3gm/ kg seeds before sowing.
Soil drenching with Carbendazim 50% @ 300 gm/acre or Metalaxyl 8%+Mancozeb 64% @ 500 gm/acrer.

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The lower portion of the stem is affected by the soil-borne inoculum.
Decortication is the main symptom.
Exposure and necrosis of underlying tissues may lead to the collapse of the plant.
Near the ground surface on the stem may be seen the mycelia.
Lack of plant vigor accumulation of water around the stem and mechanical injuries helps in the development of this disease.

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Dark brown water-soaked lesions and girdling at the base of stem occurs. Finally, the entire plant to rot and die.
Cottony white mycelium in the surface of the infected tissue occurs with advanced infections.
Affected plants can be easily uprooted but the lower part of the root usually remains in soil.
Treat the seed with Carbendazim 50% WP @ 2.5 gm/kg of seed before sowing.
Drench vine with Mancozeb 63% + Carbendazim 12% WP @ 400 gm/acre or thiophanate methyl 70% WP @ 300 gm/acre are recommended for control.
Previous crop residues should be buried deep.

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25/07/2018

Management of Collar Rot in Soybean:-

Symptoms:-

Infection usually occurs at or just below the soil surface.
Sudden yellowing or wilting of plants is the first symptom.
Light brown lesions, which quickly darken, enlarge until the hypocotyl or stem is girdled.
Leaves turn brown, dry and often cling to dead stem.

Management:-

Deep ploughing in summer.
Crop rotation with maize or sorghum.
Destroy infected stubble.
Seed treatment with Carbendazim or Thiram 2g/kg of seed.
Spot drenching with Carbendazim @ 3 gm/liter or Thiophanate methyl 70% WP @ 2 gm/liter of Water.

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Symptoms:-

The lower portion of the stem is affected from the soil borne inoculums.
Decortication is the main symptom.
Exposure and necrosis of underlying tissues may lead to collapse of the plant.
Near the ground surface on the stem may be seen the mycelia.
Lack of plant vigour accumulation of water around the stem and mechanical injuries help in development of this disease.

Control:-

Destroy of debris of diseased plants.
Crop rotation and ensure good drainage.
Sowing of seeds on raised nursery beds.
Treating seeds with Carbendazim @ 2 gm/ kg seeds before sowing.
Soil drenching with Carbendazim 3 gm or Metalaxyl + Mancozeb 3 Gm per litre of water.

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