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Symptom of attack of Earhead bug/ Gundhi bug : Leaves turn yellow and later rusted from tip downwards. Appearance of numerous brownish spots at the feeding sites / shrivelling of grains.
In the case of heavy infestation, the whole earhead may become devoid of mature grains. Its presence in the field is made out by its strong smell.
Nature of damage of Earhead bug/ Gundhi bug : Both adults and nymphs do the damage. The nymphs start feeding 3 to 4 hours after hatching.
They feed on the leaf sap near the tip/ on milky sap in developing spikelets at milky stage. Sucking of the milky sap causes ill-filled/ partial filled and chaffy grains. Serious infestation can reduce the yield by 50%. The straw gives off-flavour that is unattractive to cattle.