Insect of paddy.

Rice    None Given

Insect of paddy which is at larval stage and is orange in colour. It's found in Stem.
Please help in identifying the insect.

Posted by: Rupinder Singh (13 points) Rupinder Singh
Posted: September 24, 2016


The picture is not so good as it is out of focus and not close up, but this looks like the stem borer Scirpophaga incertulas. This is a lepidopteran that eats the rice and causes significant damage to the plant. Whether it is this exact species or not it is quite likely a stem borer and there are around 50 species.

"The initial boring and feeding by larvae in the leaf sheath cause broad, longitudinal, whitish, discolored areas at feeding sites, but only rarely do they result in wilting and drying
of the leaf blades. About a week after hatching, the larvae from the leaf
sheaths bore into the stem and, staying in the pith, feed on the inner surface of the walls. Such feeding frequently severs the apical parts of the plant from the base. When this
occurs during the vegetative phase of the plant, the central leaf whorl does not unfold, but turns brownish and dries off, although the lower leaves remain green and healthy."

How long ago did you sow? Is the pannicle formed?

Is the problem widespread?

Posted by: David Hughes (54 points) David Hughes
Posted: September 25, 2016

Rupinder Singh commented,
Thanks Dr. David. I do agree with you. Crop is just at panicle initiation stage. It's 'Poonam' a hybrid variety of paddy and is heavily infested with Sugarcane pyrilla, Brown plant hopper, stem borer, leaf folder, Pollen beetle and in the nearby field we have another paddy variety 'Sharbati' and no such infestation seen there. The only reason that I analyse and you may agree is that we must grow region specific varities that are more adoptable and are good performer produced in that specfic area rather than growing high yieding varities of other state that may induce many other insect-pest infestation problem and even sometime diseases for being susceptible. Thanks for giving your detailed answer. Regards Rupinder Singh
almost 4 years ago.

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