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BACKGROUND
In the field, we observed that many white‐backed planthoppers (Sogatella furcifera, WBPHs) stayed in the top region of rice plants exposed to direct sunshine. It was known that WBPHs frequently took flight when the ground temperature was about 25 °C, then climbed to and flew in a dense layer corresponding to an air temperature of about 16 °C in the sky. Its migration height was higher...
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