Hi all,

I am doing research on varietal screening of rice germplasm against brown plant hopper and white-backed plant hopper under field condition. According to IRRI standard evaluation system for rice, the screening of rice germplam against these pests based on its symptom i.e. hopper burn. Therefore, my question is how can differentiate the symptom "Hooper burn" whether it is caused by BPH or WBPH.

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