Mustard Eighth to ninth week practices

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Mustard aphid:

Symptoms:

Both nymphs and adults suck the sap from leaves, buds and pods.
Curling may occur for infested leaves and at advanced stage plants may wither and die.
Plants remain stunted and sooty molds grow on the honeydew excreted by the insects.

Management:

Spray the crop with one of the following in the flowering stage: oxydemeton methyl, dimethoate @625-1000 ml per ha

Bacterial blight:

Symptoms

The leaf tissue turns yellow and chlorosis reaches towards the centre of the leaf and forms a V shaped area with base of V towards the midrib.
The veins show brown to black discoloration. Dark coloured streaks are formed on the stem from the ground level and gradually these streaks enlarge and girdle the stem.
Stem becomes hollow due to internal rotting.
Midrib cracking of lower leaves, browning of veins and withering is observed.
In severe cases, the vesicular bundles of the stem also turn brown and the plant collapses.

Chemical control:

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