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Disease/Pest

area wise diseases

Crop Name:

Sorghum

Disease/Pest Name:

Stem Borer

Reported Area:

Kaithepalli

Reported Mandal:

Repalle

Symptoms:

Early Symptom: Shot holes on the whorls & newly opened leaves.
The larvae bores into midrib & the shoot, feeds on internal tissues & causes typical dead heart formation.
After the internode elongation the growing point moved upwards, the larvae make tunnel into the stem & also presence of red patches on the internodal region.
Later infestation occurs on the top portion of the stem.

Causal_organism:

Chilo partellus

Curative Measures:

Mix any one of the following insecticides with sand and apply in the leaf whorls. Phorate - 10 G (or) Carbofuran 3 G (or) Endosulfan 4D (or) spray Endosulfan 35 EC (or) Carbaryl 50 WP.

Preventive Methods:

The stubbles should be ploughed up during winter and burnt to destroy the hibernating larvae.
Grow resistant cultivars.
Sow lab lab or Dolichos as an intercrop in the ratio of 4:1 to minimise the stem borer damage.

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